feat: add npm query cmd (#5000)

Co-authored-by: Gar <gar+gh@danger.computer>

60 files changed, 8391 insertions, 9 deletions

diff --git a/docs/content/commands/npm-query.md b/docs/content/commands/npm-query.md
new file mode 100644
index 000000000..424b9e7e4
--- /dev/null
+++ b/docs/content/commands/npm-query.md
@@ -0,0 +1,236 @@
+---
+title: npm-query
+section: 1
+description: Dependency selector query
+---
+
+### Synopsis
+
+<!-- AUTOGENERATED USAGE DESCRIPTIONS START -->
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/commands/query.js -->
+
+```bash
+npm query <selector>
+```
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/commands/query.js -->
+
+<!-- AUTOGENERATED USAGE DESCRIPTIONS END -->
+
+### Description
+
+The `npm query` command allows for usage of css selectors in order to retrieve
+an array of dependency objects.
+
+### Piping npm query to other commands
+
+```bash
+# find all dependencies with postinstall scripts & uninstall them
+npm query ":attr(scripts, [postinstall])" | jq 'map(.name)|join("\n")' -r | xargs -I {} npm uninstall {}
+
+# find all git dependencies & explain who requires them
+npm query ":type(git)" | jq 'map(.name)' | xargs -I {} npm why {}
+```
+
+### Extended Use Cases & Queries
+
+```stylus
+// all deps
+*
+
+// all direct deps
+:root > *
+
+// direct production deps
+:root > .prod
+
+// direct development deps
+:root > .dev
+
+// any peer dep of a direct deps
+:root > * > .peer
+
+// any workspace dep
+.workspace
+
+// all workspaces that depend on another workspace
+.workspace > .workspace
+
+// all workspaces that have peer deps
+.workspace:has(.peer)
+
+// any dep named "lodash"
+// equivalent to [name="lodash"]
+#lodash
+
+// any deps named "lodash" & within semver range ^"1.2.3"
+#lodash@^1.2.3
+// equivalent to...
+[name="lodash"]:semver(^1.2.3)
+
+// get the hoisted node for a given semver range
+#lodash@^1.2.3:not(:deduped)
+
+// querying deps with a specific version
+#lodash@2.1.5
+// equivalent to...
+[name="lodash"][version="2.1.5"]
+
+// has any deps
+:has(*)
+
+// deps with no other deps (ie. "leaf" nodes)
+:empty
+
+// manually querying git dependencies
+[repository^=github:],
+[repository^=git:],
+[repository^=https://github.com],
+[repository^=http://github.com],
+[repository^=https://github.com],
+[repository^=+git:...]
+
+// querying for all git dependencies
+:type(git)
+
+// get production dependencies that aren't also dev deps
+.prod:not(.dev)
+
+// get dependencies with specific licenses
+[license=MIT], [license=ISC]
+
+// find all packages that have @ruyadorno as a contributor
+:attr(contributors, [email=ruyadorno@github.com])
+```
+
+### Example Response Output
+
+- an array of dependency objects is returned which can contain multiple copies of the same package which may or may not have been linked or deduped
+
+```json
+[
+  {
+    "name": "",
+    "version": "",
+    "description": "",
+    "homepage": "",
+    "bugs": {},
+    "author": {},
+    "license": {},
+    "funding": {},
+    "files": [],
+    "main": "",
+    "browser": "",
+    "bin": {},
+    "man": [],
+    "directories": {},
+    "repository": {},
+    "scripts": {},
+    "config": {},
+    "dependencies": {},
+    "devDependencies": {},
+    "optionalDependencies": {},
+    "bundledDependencies": {},
+    "peerDependencies": {},
+    "peerDependenciesMeta": {},
+    "engines": {},
+    "os": [],
+    "cpu": [],
+    "workspaces": {},
+    "keywords": [],
+    ...
+  },
+  ...
+```
+
+### Configuration
+
+<!-- AUTOGENERATED CONFIG DESCRIPTIONS START -->
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+#### `global`
+
+* Default: false
+* Type: Boolean
+
+Operates in "global" mode, so that packages are installed into the `prefix`
+folder instead of the current working directory. See
+[folders](/configuring-npm/folders) for more on the differences in behavior.
+
+* packages are installed into the `{prefix}/lib/node_modules` folder, instead
+  of the current working directory.
+* bin files are linked to `{prefix}/bin`
+* man pages are linked to `{prefix}/share/man`
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
+#### `workspace`
+
+* Default:
+* Type: String (can be set multiple times)
+
+Enable running a command in the context of the configured workspaces of the
+current project while filtering by running only the workspaces defined by
+this configuration option.
+
+Valid values for the `workspace` config are either:
+
+* Workspace names
+* Path to a workspace directory
+* Path to a parent workspace directory (will result in selecting all
+  workspaces within that folder)
+
+When set for the `npm init` command, this may be set to the folder of a
+workspace which does not yet exist, to create the folder and set it up as a
+brand new workspace within the project.
+
+This value is not exported to the environment for child processes.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
+#### `workspaces`
+
+* Default: null
+* Type: null or Boolean
+
+Set to true to run the command in the context of **all** configured
+workspaces.
+
+Explicitly setting this to false will cause commands like `install` to
+ignore workspaces altogether. When not set explicitly:
+
+- Commands that operate on the `node_modules` tree (install, update, etc.)
+will link workspaces into the `node_modules` folder. - Commands that do
+other things (test, exec, publish, etc.) will operate on the root project,
+_unless_ one or more workspaces are specified in the `workspace` config.
+
+This value is not exported to the environment for child processes.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
+#### `include-workspace-root`
+
+* Default: false
+* Type: Boolean
+
+Include the workspace root when workspaces are enabled for a command.
+
+When false, specifying individual workspaces via the `workspace` config, or
+all workspaces via the `workspaces` flag, will cause npm to operate only on
+the specified workspaces, and not on the root project.
+
+This value is not exported to the environment for child processes.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
+<!-- AUTOGENERATED CONFIG DESCRIPTIONS END -->
+## See Also
+
+* [dependency selector](/using-npm/dependency-selector)
+
diff --git a/docs/content/using-npm/dependency-selectors.md b/docs/content/using-npm/dependency-selectors.md
new file mode 100644
index 000000000..9d65baf63
--- /dev/null
+++ b/docs/content/using-npm/dependency-selectors.md
@@ -0,0 +1,168 @@
+---
+title: Dependency Selector Syntax & Querying
+section: 7
+description: Dependency Selector Syntax & Querying
+---
+
+### Description
+
+The [`npm query`](/commands/npm-query) commmand exposes a new dependency selector syntax (informed by & respecting many aspects of the [CSS Selectors 4 Spec](https://dev.w3.org/csswg/selectors4/#relational)) which:
+
+- Standardizes the shape of, & querying of, dependency graphs with a robust object model, metadata & selector syntax
+- Leverages existing, known language syntax & operators from CSS to make disparate package information broadly accessible
+- Unlocks the ability to answer complex, multi-faceted questions about dependencies, their relationships & associative metadata
+- Consolidates redundant logic of similar query commands in `npm` (ex. `npm fund`, `npm ls`, `npm outdated`, `npm audit` ...)
+
+### Dependency Selector Syntax `v1.0.0`
+
+#### Overview:
+
+- there is no "type" or "tag" selectors (ex. `div, h1, a`) as a dependency/target is the only type of `Node` that can be queried
+- the term "dependencies" is in reference to any `Node` found in a `tree` returned by `Arborist`
+
+#### Combinators
+
+- `>` direct descendant/child
+- ` ` any descendant/child
+- `~` sibling
+
+#### Selectors
+
+- `*` universal selector
+- `#<name>` dependency selector (equivalent to `[name="..."]`)
+- `#<name>@<version>` (equivalent to `[name=<name>]:semver(<version>)`)
+- `,` selector list delimiter
+- `.` dependency type selector
+- `:` pseudo selector
+
+#### Dependency Type Selectors
+
+- `.prod` dependency found in the `dependencies` section of `package.json`, or is a child of said dependency
+- `.dev` dependency found in the `devDependencies` section of `package.json`, or is a child of said dependency
+- `.optional` dependency found in the `optionalDependencies` section of `package.json`, or has `"optional": true` set in its entry in the `peerDependenciesMeta` section of `package.json`, or a child of said dependency
+- `.peer` dependency found in the `peerDependencies` section of `package.json`
+- `.workspace` dependency found in the [`workspaces`](https://docs.npmjs.com/cli/v8/using-npm/workspaces) section of `package.json`
+- `.bundled` dependency found in the `bundleDependencies` section of `package.json`, or is a child of said dependency
+
+#### Pseudo Selectors
+- [`:not(<selector>)`](https://developer.mozilla.org/en-US/docs/Web/CSS/:not)
+- [`:has(<selector>)`](https://developer.mozilla.org/en-US/docs/Web/CSS/:has)
+- [`:is(<selector list>)`](https://developer.mozilla.org/en-US/docs/Web/CSS/:is)
+- [`:root`](https://developer.mozilla.org/en-US/docs/Web/CSS/:root) matches the root node/dependency
+- [`:scope`](https://developer.mozilla.org/en-US/docs/Web/CSS/:scope) matches node/dependency it was queried against
+- [`:empty`](https://developer.mozilla.org/en-US/docs/Web/CSS/:empty) when a dependency has no dependencies
+- [`:private`](https://docs.npmjs.com/cli/v8/configuring-npm/package-json#private) when a dependency is private
+- `:link` when a dependency is linked (for instance, workspaces or packages manually [`linked`](https://docs.npmjs.com/cli/v8/commands/npm-link)
+- `:deduped` when a dependency has been deduped (note that this does *not* always mean the dependency has been hoisted to the root of node_modules)
+- `:override` when a dependency is an override (not implemented yet)
+- `:extraneous` when a dependency exists but is not defined as a dependency of any node
+- `:invalid` when a dependency version is out of its ancestors specified range
+- `:missing` when a dependency is not found on disk
+- `:semver(<spec>)` matching a valid [`node-semver`](https://github.com/npm/node-semver) spec
+- `:path(<path>)` [glob](https://www.npmjs.com/package/glob) matching based on dependencies path relative to the project
+- `:type(<type>)` [based on currently recognized types](https://github.com/npm/npm-package-arg#result-object)
+
+#### [Attribute Selectors](https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors)
+
+The attribute selector evaluates the key/value pairs in `package.json` if they are `String`s.
+
+- `[]` attribute selector (ie. existence of attribute)
+- `[attribute=value]` attribute value is equivalant...
+- `[attribute~=value]` attribute value contains word...
+- `[attribute*=value]` attribute value contains string...
+- `[attribute|=value]` attribute value is equal to or starts with...
+- `[attribute^=value]` attribute value starts with...
+- `[attribute$=value]` attribute value ends with...
+
+#### `Array` & `Object` Attribute Selectors
+
+The generic `:attr()` pseudo selector standardizes a pattern which can be used for attribute selection of `Object`s, `Array`s or `Arrays` of `Object`s accessible via `Arborist`'s `Node.package` metadata. This allows for iterative attribute selection beyond top-level `String` evaluation. The last argument passed to `:attr()` must be an `attribute` selector or a nested `:attr()`. See examples below:
+
+#### `Objects`
+
+```css
+/* return dependencies that have a `scripts.test` containing `"tap"` */
+*:attr(scripts, [test~=tap])
+```
+
+#### Nested `Objects`
+
+Nested objects are expressed as sequential arguments to `:attr()`.
+
+```css
+/* return dependencies that have a testling config for opera browsers */
+*:attr(testling, browsers, [~=opera])
+```
+
+#### `Arrays`
+
+`Array`s specifically uses a special/reserved `.` character in place of a typical attribute name. `Arrays` also support exact `value` matching when a `String` is passed to the selector.
+
+##### Example of an `Array` Attribute Selection:
+```css
+/* removes the distinction between properties & arrays */
+/* ie. we'd have to check the property & iterate to match selection */
+*:attr([keywords^=react])
+*:attr(contributors, :attr([name~=Jordan]))
+```
+
+##### Example of an `Array` matching directly to a value:
+```css
+/* return dependencies that have the exact keyword "react" */
+/* this is equivalent to `*:keywords([value="react"])` */
+*:attr([keywords=react])
+```
+
+##### Example of an `Array` of `Object`s:
+```css
+/* returns */
+*:attr(contributors, [email=ruyadorno@github.com])
+```
+
+### Groups
+
+Dependency groups are defined by the package relationships to their ancestors (ie. the dependency types that are defined in `package.json`). This approach is user-centric as the ecosystem has been taught to think about dependencies in these groups first-and-foremost. Dependencies are allowed to be included in multiple groups (ex. a `prod` dependency may also be a `dev` dependency (in that it's also required by another `dev` dependency) & may also be `bundled` - a selector for that type of dependency would look like: `*.prod.dev.bundled`).
+
+- `.prod`
+- `.dev`
+- `.optional`
+- `.peer`
+- `.bundled`
+- `.workspace`
+
+Please note that currently `workspace` deps are always `prod` dependencies.  Additionally the `.root` dependency is also considered a `prod` dependency.
+
+### Programmatic Usage
+
+- `Arborist`'s `Node` Class has a `.querySelectorAll()` method
+  - this method will return a filtered, flattened dependency Arborist `Node` list based on a valid query selector
+
+```js
+const Arborist = require('@npmcli/arborist')
+const arb = new Arborist({})
+```
+
+```js
+// root-level
+arb.loadActual((tree) => {
+  // query all production dependencies
+  const results = await tree.querySelectorAll('.prod')
+  console.log(results)
+})
+```
+
+```js
+// iterative
+arb.loadActual((tree) => {
+  // query for the deduped version of react
+  const results = await tree.querySelectorAll('#react:not(:deduped)')
+  // query the deduped react for git deps
+  const deps = await results[0].querySelectorAll(':type(git)')
+  console.log(deps)
+})
+```
+
+## See Also
+
+* [npm query](/commands/npm-query)
+* [@npmcli/arborist](https://npm.im/@npmcli/arborist]
diff --git a/docs/nav.yml b/docs/nav.yml
index bc39b969e..565537054 100644
--- a/docs/nav.yml
+++ b/docs/nav.yml
@@ -132,6 +132,9 @@
   - title: npm publish
     url: /commands/npm-publish
     description: Publish a package
+  - title: npm query
+    url: /commands/npm-query
+    description: Retrieve a filtered list of packages
   - title: npm rebuild
     url: /commands/npm-rebuild
     description: Rebuild a package
@@ -253,6 +256,9 @@
   - title: Organizations
     url: /using-npm/orgs
     description: Working with teams & organizations
+  - title: Dependency Selectors
+    url: /using-npm/dependency-selectors
+    description: Dependency Selector Syntax & Querying
   - title: Developers
     url: /using-npm/developers
     description: Developer guide
diff --git a/lib/commands/query.js b/lib/commands/query.js
new file mode 100644
index 000000000..371fddef9
--- /dev/null
+++ b/lib/commands/query.js
@@ -0,0 +1,104 @@
+'use strict'
+
+const { resolve } = require('path')
+const Arborist = require('@npmcli/arborist')
+const BaseCommand = require('../base-command.js')
+
+class QuerySelectorItem {
+  constructor (node) {
+    // all enumerable properties from the target
+    Object.assign(this, node.target.package)
+
+    // append extra info
+    this.pkgid = node.target.pkgid
+    this.location = node.target.location
+    this.path = node.target.path
+    this.realpath = node.target.realpath
+    this.resolved = node.target.resolved
+    this.from = []
+    this.to = []
+    this.dev = node.target.dev
+    this.inBundle = node.target.inBundle
+    this.deduped = this.from.length > 1
+    for (const edge of node.target.edgesIn) {
+      this.from.push(edge.from.location)
+    }
+    for (const [, edge] of node.target.edgesOut) {
+      if (edge.to) {
+        this.to.push(edge.to.location)
+      }
+    }
+  }
+}
+
+class Query extends BaseCommand {
+  #response = [] // response is the query response
+  #seen = new Set() // paths we've seen so we can keep response deduped
+
+  static description = 'Retrieve a filtered list of packages'
+  static name = 'query'
+  static usage = ['<selector>']
+
+  static ignoreImplicitWorkspace = false
+
+  static params = [
+    'global',
+    'workspace',
+    'workspaces',
+    'include-workspace-root',
+  ]
+
+  get parsedResponse () {
+    return JSON.stringify(this.#response, null, 2)
+  }
+
+  async exec (args) {
+    // one dir up from wherever node_modules lives
+    const where = resolve(this.npm.dir, '..')
+    const opts = {
+      ...this.npm.flatOptions,
+      path: where,
+    }
+    const arb = new Arborist(opts)
+    const tree = await arb.loadActual(opts)
+    const items = await tree.querySelectorAll(args[0])
+    this.buildResponse(items)
+
+    this.npm.output(this.parsedResponse)
+  }
+
+  async execWorkspaces (args, filters) {
+    await this.setWorkspaces(filters)
+    const opts = {
+      ...this.npm.flatOptions,
+      path: this.npm.prefix,
+    }
+    const arb = new Arborist(opts)
+    const tree = await arb.loadActual(opts)
+    for (const workspacePath of this.workspacePaths) {
+      let items
+      if (workspacePath === tree.root.path) {
+        // include-workspace-root
+        items = await tree.querySelectorAll(args[0])
+      } else {
+        const [workspace] = await tree.querySelectorAll(`.workspace:path(${workspacePath})`)
+        items = await workspace.target.querySelectorAll(args[0])
+      }
+      this.buildResponse(items)
+    }
+    this.npm.output(this.parsedResponse)
+  }
+
+  // builds a normalized inventory
+  buildResponse (items) {
+    for (const node of items) {
+      if (!this.#seen.has(node.target.location)) {
+        const item = new QuerySelectorItem(node)
+        this.#response.push(item)
+        this.#seen.add(item.location)
+      }
+    }
+  }
+}
+
+module.exports = Query
diff --git a/lib/utils/cmd-list.js b/lib/utils/cmd-list.js
index c1d20186a..38439542a 100644
--- a/lib/utils/cmd-list.js
+++ b/lib/utils/cmd-list.js
@@ -114,6 +114,7 @@ const cmdList = [
   'profile',
   'prune',
   'publish',
+  'query',
   'rebuild',
   'repo',
   'restart',
diff --git a/node_modules/@npmcli/query/LICENSE b/node_modules/@npmcli/query/LICENSE
new file mode 100644
index 000000000..5fc208ff1
--- /dev/null
+++ b/node_modules/@npmcli/query/LICENSE
@@ -0,0 +1,20 @@
+<!-- This file is automatically added by @npmcli/template-oss. Do not edit. -->
+
+ISC License
+
+Copyright npm, Inc.
+
+Permission to use, copy, modify, and/or distribute this
+software for any purpose with or without fee is hereby
+granted, provided that the above copyright notice and this
+permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND NPM DISCLAIMS ALL
+WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO
+EVENT SHALL NPM BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
+USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/@npmcli/query/lib/index.js b/node_modules/@npmcli/query/lib/index.js
new file mode 100644
index 000000000..3986baeac
--- /dev/null
+++ b/node_modules/@npmcli/query/lib/index.js
@@ -0,0 +1,187 @@
+'use strict'
+
+const npa = require('npm-package-arg')
+const parser = require('postcss-selector-parser')
+const semver = require('semver')
+
+const arrayDelimiter = Symbol('arrayDelimiter')
+
+const escapeSlashes = str =>
+  str.replace(/\//g, '\\/')
+
+const unescapeSlashes = str =>
+  str.replace(/\\\//g, '/')
+
+const fixupIds = astNode => {
+  const { name, rawSpec: part } = npa(astNode.value)
+  const versionParts = [{ astNode, part }]
+  let currentAstNode = astNode.next()
+
+  if (!part) {
+    return
+  }
+
+  while (currentAstNode) {
+    versionParts.push({ astNode: currentAstNode, part: String(currentAstNode) })
+    currentAstNode = currentAstNode.next()
+  }
+
+  let version
+  let length = versionParts.length
+  while (!version && length) {
+    version =
+      semver.valid(
+        versionParts.slice(0, length).reduce((res, i) => `${res}${i.part}`, '')
+      )
+    length--
+  }
+
+  astNode.value = `${name}@${version}`
+
+  for (let i = 1; i <= length; i++) {
+    versionParts[i].astNode.remove()
+  }
+}
+
+// recursively fixes up any :attr pseudo-class found
+const fixupAttr = astNode => {
+  const properties = []
+  const matcher = {}
+  for (const selectorAstNode of astNode.nodes) {
+    const [firstAstNode] = selectorAstNode.nodes
+    if (firstAstNode.type === 'tag') {
+      properties.push(firstAstNode.value)
+    }
+  }
+
+  const lastSelectorAstNode = astNode.nodes.pop()
+  const [attributeAstNode] = lastSelectorAstNode.nodes
+
+  if (attributeAstNode.value === ':attr') {
+    const appendParts = fixupAttr(attributeAstNode)
+    properties.push(arrayDelimiter, ...appendParts.lookupProperties)
+    matcher.qualifiedAttribute = appendParts.attributeMatcher.qualifiedAttribute
+    matcher.operator = appendParts.attributeMatcher.operator
+    matcher.value = appendParts.attributeMatcher.value
+
+    // backwards compatibility
+    matcher.attribute = appendParts.attributeMatcher.attribute
+
+    if (appendParts.attributeMatcher.insensitive) {
+      matcher.insensitive = true
+    }
+  } else {
+    matcher.qualifiedAttribute = attributeAstNode.qualifiedAttribute
+    matcher.operator = attributeAstNode.operator || ''
+    matcher.value = attributeAstNode.value
+
+    // backwards compatibility
+    matcher.attribute = attributeAstNode.qualifiedAttribute
+
+    if (attributeAstNode.insensitive) {
+      matcher.insensitive = true
+    }
+
+    if (attributeAstNode.type !== 'attribute') {
+      throw Object.assign(
+        new Error('`:attr` pseudo-class expects an attribute matcher as the last value'),
+        { code: 'EQUERYATTR' }
+      )
+    }
+  }
+
+  astNode.lookupProperties = properties
+  astNode.attributeMatcher = matcher
+  astNode.nodes.length = 0
+  return astNode
+}
+
+// fixed up nested pseudo nodes will have their internal selectors moved
+// to a new root node that will be referenced by the `nestedNode` property,
+// this tweak makes it simpler to reuse `retrieveNodesFromParsedAst` to
+// recursively parse and extract results from the internal selectors
+const fixupNestedPseudo = astNode => {
+  // create a new ast root node and relocate any children
+  // selectors of the current ast node to this new root
+  const newRootNode = parser.root()
+  astNode.nestedNode = newRootNode
+  newRootNode.nodes = [...astNode.nodes]
+
+  // clean up the ast by removing the children nodes from the
+  // current ast node while also cleaning up their `parent` refs
+  astNode.nodes.length = 0
+  for (const currAstNode of newRootNode.nodes) {
+    currAstNode.parent = newRootNode
+  }
+
+  // recursively fixup nodes of any nested selector
+  transformAst(newRootNode)
+}
+
+const fixupSemverSpecs = astNode => {
+  const children = astNode.nodes[0].nodes
+  const value = children.reduce((res, i) => `${res}${String(i)}`, '')
+
+  astNode.semverValue = value
+  astNode.nodes.length = 0
+}
+
+const fixupTypes = astNode => {
+  const [valueAstNode] = astNode.nodes[0].nodes
+  const { value } = valueAstNode || {}
+  astNode.typeValue = value
+  astNode.nodes.length = 0
+}
+
+const fixupPaths = astNode => {
+  astNode.pathValue = unescapeSlashes(String(astNode.nodes[0]))
+  astNode.nodes.length = 0
+}
+
+// a few of the supported ast nodes need to be tweaked in order to properly be
+// interpreted as proper arborist query selectors, namely semver ranges from
+// both ids and :semver pseudo-class selectors need to be translated from what
+// are usually multiple ast nodes, such as: tag:1, class:.0, class:.0 to a
+// single `1.0.0` value, other pseudo-class selectors also get preprocessed in
+// order to make it simpler to execute later when traversing each ast node
+// using rootNode.walk(), such as :path, :type, etc. transformAst handles all
+// these modifications to the parsed ast by doing an extra, initial traversal
+// of the parsed ast from the query and modifying the parsed nodes accordingly
+const transformAst = selector => {
+  selector.walk((nextAstNode) => {
+    if (nextAstNode.type === 'id') {
+      fixupIds(nextAstNode)
+    }
+
+    switch (nextAstNode.value) {
+      case ':attr':
+        return fixupAttr(nextAstNode)
+      case ':is':
+      case ':has':
+      case ':not':
+        return fixupNestedPseudo(nextAstNode)
+      case ':path':
+        return fixupPaths(nextAstNode)
+      case ':semver':
+        return fixupSemverSpecs(nextAstNode)
+      case ':type':
+        return fixupTypes(nextAstNode)
+    }
+  })
+}
+
+const queryParser = (query) => {
+  // if query is an empty string or any falsy
+  // value, just returns an empty result
+  if (!query) {
+    return []
+  }
+
+  return parser(transformAst)
+    .astSync(escapeSlashes(query), { lossless: false })
+}
+
+module.exports = {
+  parser: queryParser,
+  arrayDelimiter,
+}
diff --git a/node_modules/@npmcli/query/package.json b/node_modules/@npmcli/query/package.json
new file mode 100644
index 000000000..f7f656233
--- /dev/null
+++ b/node_modules/@npmcli/query/package.json
@@ -0,0 +1,61 @@
+{
+  "name": "@npmcli/query",
+  "version": "1.1.0",
+  "description": "npm query parser and tools",
+  "main": "lib/index.js",
+  "scripts": {
+    "test": "tap",
+    "lint": "eslint \"**/*.js\"",
+    "postlint": "template-oss-check",
+    "template-oss-apply": "template-oss-apply --force",
+    "lintfix": "npm run lint -- --fix",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "prepublishOnly": "git push origin --follow-tags",
+    "snap": "tap",
+    "posttest": "npm run lint"
+  },
+  "contributors": [
+    {
+      "name": "Ruy Adorno",
+      "url": "https://ruyadorno.com",
+      "twitter": "ruyadorno"
+    }
+  ],
+  "keywords": [
+    "ast",
+    "npm",
+    "npmcli",
+    "parser",
+    "postcss",
+    "postcss-selector-parser",
+    "query"
+  ],
+  "author": "GitHub Inc.",
+  "license": "ISC",
+  "files": [
+    "bin/",
+    "lib/"
+  ],
+  "engines": {
+    "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+  },
+  "templateOSS": {
+    "//@npmcli/template-oss": "This file is partially managed by @npmcli/template-oss. Edits may be overwritten.",
+    "version": "3.5.0"
+  },
+  "devDependencies": {
+    "@npmcli/eslint-config": "^3.0.1",
+    "@npmcli/template-oss": "3.5.0",
+    "tap": "^16.2.0"
+  },
+  "dependencies": {
+    "npm-package-arg": "^9.1.0",
+    "postcss-selector-parser": "^6.0.10",
+    "semver": "^7.3.7"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/npm/query.git"
+  }
+}
diff --git a/node_modules/cssesc/LICENSE-MIT.txt b/node_modules/cssesc/LICENSE-MIT.txt
new file mode 100644
index 000000000..a41e0a7ef
--- /dev/null
+++ b/node_modules/cssesc/LICENSE-MIT.txt
@@ -0,0 +1,20 @@
+Copyright Mathias Bynens <https://mathiasbynens.be/>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/cssesc/bin/cssesc b/node_modules/cssesc/bin/cssesc
new file mode 100755
index 000000000..188c034ff
--- /dev/null
+++ b/node_modules/cssesc/bin/cssesc
@@ -0,0 +1,116 @@
+#!/usr/bin/env node
+const fs = require('fs');
+const cssesc = require('../cssesc.js');
+const strings = process.argv.splice(2);
+const stdin = process.stdin;
+const options = {};
+const log = console.log;
+
+const main = function() {
+	const option = strings[0];
+
+	if (/^(?:-h|--help|undefined)$/.test(option)) {
+		log(
+			'cssesc v%s - https://mths.be/cssesc',
+			cssesc.version
+		);
+		log([
+			'\nUsage:\n',
+			'\tcssesc [string]',
+			'\tcssesc [-i | --identifier] [string]',
+			'\tcssesc [-s | --single-quotes] [string]',
+			'\tcssesc [-d | --double-quotes] [string]',
+			'\tcssesc [-w | --wrap] [string]',
+			'\tcssesc [-e | --escape-everything] [string]',
+			'\tcssesc [-v | --version]',
+			'\tcssesc [-h | --help]',
+			'\nExamples:\n',
+			'\tcssesc \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
+			'\tcssesc --identifier \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
+			'\tcssesc --escape-everything \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
+			'\tcssesc --double-quotes --wrap \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
+			'\techo \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\' | cssesc'
+		].join('\n'));
+		return process.exit(1);
+	}
+
+	if (/^(?:-v|--version)$/.test(option)) {
+		log('v%s', cssesc.version);
+		return process.exit(1);
+	}
+
+	strings.forEach(function(string) {
+		// Process options
+		if (/^(?:-i|--identifier)$/.test(string)) {
+			options.isIdentifier = true;
+			return;
+		}
+		if (/^(?:-s|--single-quotes)$/.test(string)) {
+			options.quotes = 'single';
+			return;
+		}
+		if (/^(?:-d|--double-quotes)$/.test(string)) {
+			options.quotes = 'double';
+			return;
+		}
+		if (/^(?:-w|--wrap)$/.test(string)) {
+			options.wrap = true;
+			return;
+		}
+		if (/^(?:-e|--escape-everything)$/.test(string)) {
+			options.escapeEverything = true;
+			return;
+		}
+
+		// Process string(s)
+		let result;
+		try {
+			result = cssesc(string, options);
+			log(result);
+		} catch (exception) {
+			log(exception.message + '\n');
+			log('Error: failed to escape.');
+			log('If you think this is a bug in cssesc, please report it:');
+			log('https://github.com/mathiasbynens/cssesc/issues/new');
+			log(
+				'\nStack trace using cssesc@%s:\n',
+				cssesc.version
+			);
+			log(exception.stack);
+			return process.exit(1);
+		}
+	});
+	// Return with exit status 0 outside of the `forEach` loop, in case
+	// multiple strings were passed in.
+	return process.exit(0);
+
+};
+
+if (stdin.isTTY) {
+	// handle shell arguments
+	main();
+} else {
+	let timeout;
+	// Either the script is called from within a non-TTY context, or `stdin`
+	// content is being piped in.
+	if (!process.stdout.isTTY) {
+		// The script was called from a non-TTY context. This is a rather uncommon
+		// use case we don’t actively support. However, we don’t want the script
+		// to wait forever in such cases, so…
+		timeout = setTimeout(function() {
+			// …if no piped data arrived after a whole minute, handle shell
+			// arguments instead.
+			main();
+		}, 60000);
+	}
+	let data = '';
+	stdin.on('data', function(chunk) {
+		clearTimeout(timeout);
+		data += chunk;
+	});
+	stdin.on('end', function() {
+		strings.push(data.trim());
+		main();
+	});
+	stdin.resume();
+}
diff --git a/node_modules/cssesc/cssesc.js b/node_modules/cssesc/cssesc.js
new file mode 100644
index 000000000..1c0928e45
--- /dev/null
+++ b/node_modules/cssesc/cssesc.js
@@ -0,0 +1,110 @@
+/*! https://mths.be/cssesc v3.0.0 by @mathias */
+'use strict';
+
+var object = {};
+var hasOwnProperty = object.hasOwnProperty;
+var merge = function merge(options, defaults) {
+	if (!options) {
+		return defaults;
+	}
+	var result = {};
+	for (var key in defaults) {
+		// `if (defaults.hasOwnProperty(key) { … }` is not needed here, since
+		// only recognized option names are used.
+		result[key] = hasOwnProperty.call(options, key) ? options[key] : defaults[key];
+	}
+	return result;
+};
+
+var regexAnySingleEscape = /[ -,\.\/:-@\[-\^`\{-~]/;
+var regexSingleEscape = /[ -,\.\/:-@\[\]\^`\{-~]/;
+var regexAlwaysEscape = /['"\\]/;
+var regexExcessiveSpaces = /(^|\\+)?(\\[A-F0-9]{1,6})\x20(?![a-fA-F0-9\x20])/g;
+
+// https://mathiasbynens.be/notes/css-escapes#css
+var cssesc = function cssesc(string, options) {
+	options = merge(options, cssesc.options);
+	if (options.quotes != 'single' && options.quotes != 'double') {
+		options.quotes = 'single';
+	}
+	var quote = options.quotes == 'double' ? '"' : '\'';
+	var isIdentifier = options.isIdentifier;
+
+	var firstChar = string.charAt(0);
+	var output = '';
+	var counter = 0;
+	var length = string.length;
+	while (counter < length) {
+		var character = string.charAt(counter++);
+		var codePoint = character.charCodeAt();
+		var value = void 0;
+		// If it’s not a printable ASCII character…
+		if (codePoint < 0x20 || codePoint > 0x7E) {
+			if (codePoint >= 0xD800 && codePoint <= 0xDBFF && counter < length) {
+				// It’s a high surrogate, and there is a next character.
+				var extra = string.charCodeAt(counter++);
+				if ((extra & 0xFC00) == 0xDC00) {
+					// next character is low surrogate
+					codePoint = ((codePoint & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000;
+				} else {
+					// It’s an unmatched surrogate; only append this code unit, in case
+					// the next code unit is the high surrogate of a surrogate pair.
+					counter--;
+				}
+			}
+			value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
+		} else {
+			if (options.escapeEverything) {
+				if (regexAnySingleEscape.test(character)) {
+					value = '\\' + character;
+				} else {
+					value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
+				}
+			} else if (/[\t\n\f\r\x0B]/.test(character)) {
+				value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
+			} else if (character == '\\' || !isIdentifier && (character == '"' && quote == character || character == '\'' && quote == character) || isIdentifier && regexSingleEscape.test(character)) {
+				value = '\\' + character;
+			} else {
+				value = character;
+			}
+		}
+		output += value;
+	}
+
+	if (isIdentifier) {
+		if (/^-[-\d]/.test(output)) {
+			output = '\\-' + output.slice(1);
+		} else if (/\d/.test(firstChar)) {
+			output = '\\3' + firstChar + ' ' + output.slice(1);
+		}
+	}
+
+	// Remove spaces after `\HEX` escapes that are not followed by a hex digit,
+	// since they’re redundant. Note that this is only possible if the escape
+	// sequence isn’t preceded by an odd number of backslashes.
+	output = output.replace(regexExcessiveSpaces, function ($0, $1, $2) {
+		if ($1 && $1.length % 2) {
+			// It’s not safe to remove the space, so don’t.
+			return $0;
+		}
+		// Strip the space.
+		return ($1 || '') + $2;
+	});
+
+	if (!isIdentifier && options.wrap) {
+		return quote + output + quote;
+	}
+	return output;
+};
+
+// Expose default options (so they can be overridden globally).
+cssesc.options = {
+	'escapeEverything': false,
+	'isIdentifier': false,
+	'quotes': 'single',
+	'wrap': false
+};
+
+cssesc.version = '3.0.0';
+
+module.exports = cssesc;
diff --git a/node_modules/cssesc/man/cssesc.1 b/node_modules/cssesc/man/cssesc.1
new file mode 100644
index 000000000..eee4996da
--- /dev/null
+++ b/node_modules/cssesc/man/cssesc.1
@@ -0,0 +1,70 @@
+.Dd August 9, 2013
+.Dt cssesc 1
+.Sh NAME
+.Nm cssesc
+.Nd escape text for use in CSS string literals or identifiers
+.Sh SYNOPSIS
+.Nm
+.Op Fl i | -identifier Ar string
+.br
+.Op Fl s | -single-quotes Ar string
+.br
+.Op Fl d | -double-quotes Ar string
+.br
+.Op Fl w | -wrap Ar string
+.br
+.Op Fl e | -escape-everything Ar string
+.br
+.Op Fl v | -version
+.br
+.Op Fl h | -help
+.Sh DESCRIPTION
+.Nm
+escapes strings for use in CSS string literals or identifiers while generating the shortest possible valid ASCII-only output.
+.Sh OPTIONS
+.Bl -ohang -offset
+.It Sy "-s, --single-quotes"
+Escape any occurences of ' in the input string as \\', so that the output can be used in a CSS string literal wrapped in single quotes.
+.It Sy "-d, --double-quotes"
+Escape any occurences of " in the input string as \\", so that the output can be used in a CSS string literal wrapped in double quotes.
+.It Sy "-w, --wrap"
+Make sure the output is a valid CSS string literal wrapped in quotes. The type of quotes can be specified using the
+.Ar -s | --single-quotes
+or
+.Ar -d | --double-quotes
+settings.
+.It Sy "-e, --escape-everything"
+Escape all the symbols in the output, even printable ASCII symbols.
+.It Sy "-v, --version"
+Print cssesc's version.
+.It Sy "-h, --help"
+Show the help screen.
+.El
+.Sh EXIT STATUS
+The
+.Nm cssesc
+utility exits with one of the following values:
+.Pp
+.Bl -tag -width flag -compact
+.It Li 0
+.Nm
+successfully escaped the given text and printed the result.
+.It Li 1
+.Nm
+wasn't instructed to escape anything (for example, the
+.Ar --help
+flag was set); or, an error occurred.
+.El
+.Sh EXAMPLES
+.Bl -ohang -offset
+.It Sy "cssesc 'foo bar baz'"
+Print an escaped version of the given text.
+.It Sy echo\ 'foo bar baz'\ |\ cssesc
+Print an escaped version of the text that gets piped in.
+.El
+.Sh BUGS
+cssesc's bug tracker is located at <https://github.com/mathiasbynens/cssesc/issues>.
+.Sh AUTHOR
+Mathias Bynens <https://mathiasbynens.be/>
+.Sh WWW
+<https://mths.be/cssesc>
diff --git a/node_modules/cssesc/package.json b/node_modules/cssesc/package.json
new file mode 100644
index 000000000..076c84dc8
--- /dev/null
+++ b/node_modules/cssesc/package.json
@@ -0,0 +1,51 @@
+{
+  "name": "cssesc",
+  "version": "3.0.0",
+  "description": "A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.",
+  "homepage": "https://mths.be/cssesc",
+  "engines": {
+    "node": ">=4"
+  },
+  "main": "cssesc.js",
+  "bin": "bin/cssesc",
+  "man": "man/cssesc.1",
+  "keywords": [
+    "css",
+    "escape",
+    "identifier",
+    "string",
+    "tool"
+  ],
+  "license": "MIT",
+  "author": {
+    "name": "Mathias Bynens",
+    "url": "https://mathiasbynens.be/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mathiasbynens/cssesc.git"
+  },
+  "bugs": "https://github.com/mathiasbynens/cssesc/issues",
+  "files": [
+    "LICENSE-MIT.txt",
+    "cssesc.js",
+    "bin/",
+    "man/"
+  ],
+  "scripts": {
+    "build": "grunt template && babel cssesc.js -o cssesc.js",
+    "test": "mocha tests",
+    "cover": "istanbul cover --report html node_modules/.bin/_mocha tests -- -u exports -R spec"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.26.0",
+    "babel-preset-env": "^1.6.1",
+    "codecov": "^1.0.1",
+    "grunt": "^1.0.1",
+    "grunt-template": "^1.0.0",
+    "istanbul": "^0.4.4",
+    "mocha": "^2.5.3",
+    "regenerate": "^1.2.1",
+    "requirejs": "^2.1.16"
+  }
+}
diff --git a/node_modules/postcss-selector-parser/API.md b/node_modules/postcss-selector-parser/API.md
new file mode 100644
index 000000000..6aa1f1438
--- /dev/null
+++ b/node_modules/postcss-selector-parser/API.md
@@ -0,0 +1,873 @@
+# API Documentation
+
+*Please use only this documented API when working with the parser. Methods
+not documented here are subject to change at any point.*
+
+## `parser` function
+
+This is the module's main entry point.
+
+```js
+const parser = require('postcss-selector-parser');
+```
+
+### `parser([transform], [options])`
+
+Creates a new `processor` instance
+
+```js
+const processor = parser();
+```
+
+Or, with optional transform function
+
+```js
+const transform = selectors => {
+    selectors.walkUniversals(selector => {
+        selector.remove();
+    });
+};
+
+const processor = parser(transform)
+
+// Example
+const result = processor.processSync('*.class');
+// => .class
+```
+
+[See processor documentation](#processor)
+
+Arguments:
+
+* `transform (function)`: Provide a function to work with the parsed AST.
+* `options (object)`: Provide default options for all calls on the returned `Processor`.
+
+### `parser.attribute([props])`
+
+Creates a new attribute selector.
+
+```js
+parser.attribute({attribute: 'href'});
+// => [href]
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.className([props])`
+
+Creates a new class selector.
+
+```js
+parser.className({value: 'button'});
+// => .button
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.combinator([props])`
+
+Creates a new selector combinator.
+
+```js
+parser.combinator({value: '+'});
+// => +
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+Notes:
+* **Descendant Combinators** The value of descendant combinators created by the
+  parser always just a single space (`" "`). For descendant selectors with no
+  comments, additional space is now stored in `node.spaces.before`. Depending
+  on the location of comments, additional spaces may be stored in
+  `node.raws.spaces.before`, `node.raws.spaces.after`, or `node.raws.value`.
+* **Named Combinators** Although, nonstandard and unlikely to ever become a standard,
+  named combinators like `/deep/` and `/for/` are parsed as combinators. The
+  `node.value` is name after being unescaped and normalized as lowercase. The
+  original value for the combinator name is stored in `node.raws.value`.
+
+
+### `parser.comment([props])`
+
+Creates a new comment.
+
+```js
+parser.comment({value: '/* Affirmative, Dave. I read you. */'});
+// => /* Affirmative, Dave. I read you. */
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.id([props])`
+
+Creates a new id selector.
+
+```js
+parser.id({value: 'search'});
+// => #search
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.nesting([props])`
+
+Creates a new nesting selector.
+
+```js
+parser.nesting();
+// => &
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.pseudo([props])`
+
+Creates a new pseudo selector.
+
+```js
+parser.pseudo({value: '::before'});
+// => ::before
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.root([props])`
+
+Creates a new root node.
+
+```js
+parser.root();
+// => (empty)
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.selector([props])`
+
+Creates a new selector node.
+
+```js
+parser.selector();
+// => (empty)
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.string([props])`
+
+Creates a new string node.
+
+```js
+parser.string();
+// => (empty)
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.tag([props])`
+
+Creates a new tag selector.
+
+```js
+parser.tag({value: 'button'});
+// => button
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+### `parser.universal([props])`
+
+Creates a new universal selector.
+
+```js
+parser.universal();
+// => *
+```
+
+Arguments:
+
+* `props (object)`: The new node's properties.
+
+## Node types
+
+### `node.type`
+
+A string representation of the selector type. It can be one of the following;
+`attribute`, `class`, `combinator`, `comment`, `id`, `nesting`, `pseudo`,
+`root`, `selector`, `string`, `tag`, or `universal`. Note that for convenience,
+these constants are exposed on the main `parser` as uppercased keys. So for
+example you can get `id` by querying `parser.ID`.
+
+```js
+parser.attribute({attribute: 'href'}).type;
+// => 'attribute'
+```
+
+### `node.parent`
+
+Returns the parent node.
+
+```js
+root.nodes[0].parent === root;
+```
+
+### `node.toString()`, `String(node)`, or `'' + node`
+
+Returns a string representation of the node.
+
+```js
+const id = parser.id({value: 'search'});
+console.log(String(id));
+// => #search
+```
+
+### `node.next()` & `node.prev()`
+
+Returns the next/previous child of the parent node.
+
+```js
+const next = id.next();
+if (next && next.type !== 'combinator') {
+    throw new Error('Qualified IDs are not allowed!');
+}
+```
+
+### `node.replaceWith(node)`
+
+Replace a node with another.
+
+```js
+const attr = selectors.first.first;
+const className = parser.className({value: 'test'});
+attr.replaceWith(className);
+```
+
+Arguments:
+
+* `node`: The node to substitute the original with.
+
+### `node.remove()`
+
+Removes the node from its parent node.
+
+```js
+if (node.type === 'id') {
+    node.remove();
+}
+```
+
+### `node.clone()`
+
+Returns a copy of a node, detached from any parent containers that the
+original might have had.
+
+```js
+const cloned = parser.id({value: 'search'});
+String(cloned);
+
+// => #search
+```
+
+### `node.isAtPosition(line, column)`
+
+Return a `boolean` indicating whether this node includes the character at the
+position of the given line and column. Returns `undefined` if the nodes lack
+sufficient source metadata to determine the position.
+
+Arguments:
+
+* `line`: 1-index based line number relative to the start of the selector.
+* `column`: 1-index based column number relative to the start of the selector.
+
+### `node.spaces`
+
+Extra whitespaces around the node will be moved into `node.spaces.before` and
+`node.spaces.after`. So for example, these spaces will be moved as they have
+no semantic meaning:
+
+```css
+      h1     ,     h2   {}
+```
+
+For descendent selectors, the value is always a single space.
+
+```css
+h1        h2 {}
+```
+
+Additional whitespace is found in either the `node.spaces.before` and `node.spaces.after` depending on the presence of comments or other whitespace characters. If the actual whitespace does not start or end with a single space, the node's raw value is set to the actual space(s) found in the source.
+
+### `node.source`
+
+An object describing the node's start/end, line/column source position.
+
+Within the following CSS, the `.bar` class node ...
+
+```css
+.foo,
+  .bar {}
+```
+
+... will contain the following `source` object.
+
+```js
+source: {
+    start: {
+        line: 2,
+        column: 3
+    },
+    end: {
+        line: 2,
+        column: 6
+    }
+}
+```
+
+### `node.sourceIndex`
+
+The zero-based index of the node within the original source string.
+
+Within the following CSS, the `.baz` class node will have a `sourceIndex` of `12`.
+
+```css
+.foo, .bar, .baz {}
+```
+
+## Container types
+
+The `root`, `selector`, and `pseudo` nodes have some helper methods for working
+with their children.
+
+### `container.nodes`
+
+An array of the container's children.
+
+```js
+// Input: h1 h2
+selectors.at(0).nodes.length   // => 3
+selectors.at(0).nodes[0].value // => 'h1'
+selectors.at(0).nodes[1].value // => ' '
+```
+
+### `container.first` & `container.last`
+
+The first/last child of the container.
+
+```js
+selector.first === selector.nodes[0];
+selector.last === selector.nodes[selector.nodes.length - 1];
+```
+
+### `container.at(index)`
+
+Returns the node at position `index`.
+
+```js
+selector.at(0) === selector.first;
+selector.at(0) === selector.nodes[0];
+```
+
+Arguments:
+
+* `index`: The index of the node to return.
+
+### `container.atPosition(line, column)`
+
+Returns the node at the source position `index`.
+
+```js
+selector.at(0) === selector.first;
+selector.at(0) === selector.nodes[0];
+```
+
+Arguments:
+
+* `index`: The index of the node to return.
+
+### `container.index(node)`
+
+Return the index of the node within its container.
+
+```js
+selector.index(selector.nodes[2]) // => 2
+```
+
+Arguments:
+
+* `node`: A node within the current container.
+
+### `container.length`
+
+Proxy to the length of the container's nodes.
+
+```js
+container.length === container.nodes.length
+```
+
+### `container` Array iterators
+
+The container class provides proxies to certain Array methods; these are:
+
+* `container.map === container.nodes.map`
+* `container.reduce === container.nodes.reduce`
+* `container.every === container.nodes.every`
+* `container.some === container.nodes.some`
+* `container.filter === container.nodes.filter`
+* `container.sort === container.nodes.sort`
+
+Note that these methods only work on a container's immediate children; recursive
+iteration is provided by `container.walk`.
+
+### `container.each(callback)`
+
+Iterate the container's immediate children, calling `callback` for each child.
+You may return `false` within the callback to break the iteration.
+
+```js
+let className;
+selectors.each((selector, index) => {
+    if (selector.type === 'class') {
+        className = selector.value;
+        return false;
+    }
+});
+```
+
+Note that unlike `Array#forEach()`, this iterator is safe to use whilst adding
+or removing nodes from the container.
+
+Arguments:
+
+* `callback (function)`: A function to call for each node, which receives `node`
+  and `index` arguments.
+
+### `container.walk(callback)`
+
+Like `container#each`, but will also iterate child nodes as long as they are
+`container` types.
+
+```js
+selectors.walk((selector, index) => {
+    // all nodes
+});
+```
+
+Arguments:
+
+* `callback (function)`: A function to call for each node, which receives `node`
+  and `index` arguments.
+
+This iterator is safe to use whilst mutating `container.nodes`,
+like `container#each`.
+
+### `container.walk` proxies
+
+The container class provides proxy methods for iterating over types of nodes,
+so that it is easier to write modules that target specific selectors. Those
+methods are:
+
+* `container.walkAttributes`
+* `container.walkClasses`
+* `container.walkCombinators`
+* `container.walkComments`
+* `container.walkIds`
+* `container.walkNesting`
+* `container.walkPseudos`
+* `container.walkTags`
+* `container.walkUniversals`
+
+### `container.split(callback)`
+
+This method allows you to split a group of nodes by returning `true` from
+a callback. It returns an array of arrays, where each inner array corresponds
+to the groups that you created via the callback.
+
+```js
+// (input) => h1 h2>>h3
+const list = selectors.first.split(selector => {
+    return selector.type === 'combinator';
+});
+
+// (node values) => [['h1', ' '], ['h2', '>>'], ['h3']]
+```
+
+Arguments:
+
+* `callback (function)`: A function to call for each node, which receives `node`
+  as an argument.
+
+### `container.prepend(node)` & `container.append(node)`
+
+Add a node to the start/end of the container. Note that doing so will set
+the parent property of the node to this container.
+
+```js
+const id = parser.id({value: 'search'});
+selector.append(id);
+```
+
+Arguments:
+
+* `node`: The node to add.
+
+### `container.insertBefore(old, new)` & `container.insertAfter(old, new)`
+
+Add a node before or after an existing node in a container:
+
+```js
+selectors.walk(selector => {
+    if (selector.type !== 'class') {
+        const className = parser.className({value: 'theme-name'});
+        selector.parent.insertAfter(selector, className);
+    }
+});
+```
+
+Arguments:
+
+* `old`: The existing node in the container.
+* `new`: The new node to add before/after the existing node.
+
+### `container.removeChild(node)`
+
+Remove the node from the container. Note that you can also use
+`node.remove()` if you would like to remove just a single node.
+
+```js
+selector.length // => 2
+selector.remove(id)
+selector.length // => 1;
+id.parent       // undefined
+```
+
+Arguments:
+
+* `node`: The node to remove.
+
+### `container.removeAll()` or `container.empty()`
+
+Remove all children from the container.
+
+```js
+selector.removeAll();
+selector.length // => 0
+```
+
+## Root nodes
+
+A root node represents a comma separated list of selectors. Indeed, all
+a root's `toString()` method does is join its selector children with a ','.
+Other than this, it has no special functionality and acts like a container.
+
+### `root.trailingComma`
+
+This will be set to `true` if the input has a trailing comma, in order to
+support parsing of legacy CSS hacks.
+
+## Selector nodes
+
+A selector node represents a single complex selector. For example, this
+selector string `h1 h2 h3, [href] > p`, is represented as two selector nodes.
+It has no special functionality of its own.
+
+## Pseudo nodes
+
+A pseudo selector extends a container node; if it has any parameters of its
+own (such as `h1:not(h2, h3)`), they will be its children. Note that the pseudo
+`value` will always contain the colons preceding the pseudo identifier. This
+is so that both `:before` and `::before` are properly represented in the AST.
+
+## Attribute nodes
+
+### `attribute.quoted`
+
+Returns `true` if the attribute's value is wrapped in quotation marks, false if it is not.
+Remains `undefined` if there is no attribute value.
+
+```css
+[href=foo] /* false */
+[href='foo'] /* true */
+[href="foo"] /* true */
+[href] /* undefined */
+```
+
+### `attribute.qualifiedAttribute`
+
+Returns the attribute name qualified with the namespace if one is given.
+
+### `attribute.offsetOf(part)`
+
+ Returns the offset of the attribute part specified relative to the
+ start of the node of the output string. This is useful in raising
+ error messages about a specific part of the attribute, especially
+ in combination with `attribute.sourceIndex`.
+
+ Returns `-1` if the name is invalid or the value doesn't exist in this
+ attribute.
+
+ The legal values for `part` are:
+
+ * `"ns"` - alias for "namespace"
+ * `"namespace"` - the namespace if it exists.
+ * `"attribute"` - the attribute name
+ * `"attributeNS"` - the start of the attribute or its namespace
+ * `"operator"` - the match operator of the attribute
+ * `"value"` - The value (string or identifier)
+ * `"insensitive"` - the case insensitivity flag
+
+### `attribute.raws.unquoted`
+
+Returns the unquoted content of the attribute's value.
+Remains `undefined` if there is no attribute value.
+
+```css
+[href=foo] /* foo */
+[href='foo'] /* foo */
+[href="foo"] /* foo */
+[href] /* undefined */
+```
+
+### `attribute.spaces`
+
+Like `node.spaces` with the `before` and `after` values containing the spaces
+around the element, the parts of the attribute can also have spaces before
+and after them. The for each of `attribute`, `operator`, `value` and
+`insensitive` there is corresponding property of the same nam in
+`node.spaces` that has an optional `before` or `after` string containing only
+whitespace.
+
+Note that corresponding values in `attributes.raws.spaces` contain values
+including any comments. If set, these values will override the
+`attribute.spaces` value. Take care to remove them if changing
+`attribute.spaces`.
+
+### `attribute.raws`
+
+The raws object stores comments and other information necessary to re-render
+the node exactly as it was in the source.
+
+If a comment is embedded within the identifiers for the `namespace`, `attribute`
+or `value` then a property is placed in the raws for that value containing the full source of the propery including comments.
+
+If a comment is embedded within the space between parts of the attribute
+then the raw for that space is set accordingly.
+
+Setting an attribute's property `raws` value to be deleted.
+
+For now, changing the spaces required also updating or removing any of the
+raws values that override them.
+
+Example: `[ /*before*/ href /* after-attr */ = /* after-operator */ te/*inside-value*/st/* wow */ /*omg*/i/*bbq*/ /*whodoesthis*/]` would parse as:
+
+```js
+{
+  attribute: "href",
+  operator: "=",
+  value: "test",
+  spaces: {
+    before: '',
+    after: '',
+    attribute: { before: '  ', after: '  ' },
+    operator: { after: '  ' },
+    value: { after: ' ' },
+    insensitive: { after: ' ' }
+  },
+  raws: {
+    spaces: {
+      attribute: { before: ' /*before*/ ', after: ' /* after-attr */ ' },
+      operator: { after: ' /* after-operator */ ' },
+      value: { after: '/* wow */ /*omg*/' },
+      insensitive: { after: '/*bbq*/ /*whodoesthis*/' }
+    },
+    unquoted: 'test',
+    value: 'te/*inside-value*/st'
+  }
+}
+```
+
+## `Processor`
+
+### `ProcessorOptions`
+
+* `lossless` - When `true`, whitespace is preserved. Defaults to `true`.
+* `updateSelector` - When `true`, if any processor methods are passed a postcss
+  `Rule` node instead of a string, then that Rule's selector is updated
+  with the results of the processing. Defaults to `true`.
+
+### `process|processSync(selectors, [options])`
+
+Processes the `selectors`, returning a string from the result of processing.
+
+Note: when the `updateSelector` option is set, the rule's selector
+will be updated with the resulting string.
+
+**Example:**
+
+```js
+const parser = require("postcss-selector-parser");
+const processor = parser();
+
+let result = processor.processSync(' .class');
+console.log(result);
+// =>  .class
+
+// Asynchronous operation
+let promise = processor.process(' .class').then(result => {
+    console.log(result)
+    // => .class
+});
+
+// To have the parser normalize whitespace values, utilize the options
+result = processor.processSync('  .class  ', {lossless: false});
+console.log(result);
+// => .class
+
+// For better syntax errors, pass a PostCSS Rule node.
+const postcss = require('postcss');
+rule = postcss.rule({selector: ' #foo    > a,  .class  '});
+processor.process(rule, {lossless: false, updateSelector: true}).then(result => {
+    console.log(result);
+    // => #foo>a,.class
+    console.log("rule:", rule.selector);
+    // => rule: #foo>a,.class
+})
+```
+
+Arguments:
+
+* `selectors (string|postcss.Rule)`: Either a selector string or a PostCSS Rule
+  node.
+* `[options] (object)`: Process options
+
+
+### `ast|astSync(selectors, [options])`
+
+Like `process()` and `processSync()` but after
+processing the `selectors` these methods return the `Root` node of the result
+instead of a string.
+
+Note: when the `updateSelector` option is set, the rule's selector
+will be updated with the resulting string.
+
+### `transform|transformSync(selectors, [options])`
+
+Like `process()` and `processSync()` but after
+processing the `selectors` these methods return the value returned by the
+processor callback.
+
+Note: when the `updateSelector` option is set, the rule's selector
+will be updated with the resulting string.
+
+### Error Handling Within Selector Processors
+
+The root node passed to the selector processor callback
+has a method `error(message, options)` that returns an
+error object. This method should always be used to raise
+errors relating to the syntax of selectors. The options
+to this method are passed to postcss's error constructor
+([documentation](http://api.postcss.org/Container.html#error)).
+
+#### Async Error Example
+
+```js
+let processor = (root) => {
+    return new Promise((resolve, reject) => {
+        root.walkClasses((classNode) => {
+            if (/^(.*)[-_]/.test(classNode.value)) {
+                let msg = "classes may not have underscores or dashes in them";
+                reject(root.error(msg, {
+                    index: classNode.sourceIndex + RegExp.$1.length + 1,
+                    word: classNode.value
+                }));
+            }
+        });
+        resolve();
+    });
+};
+
+const postcss = require("postcss");
+const parser = require("postcss-selector-parser");
+const selectorProcessor = parser(processor);
+const plugin = postcss.plugin('classValidator', (options) => {
+    return (root) => {
+        let promises = [];
+        root.walkRules(rule => {
+            promises.push(selectorProcessor.process(rule));
+        });
+        return Promise.all(promises);
+    };
+});
+postcss(plugin()).process(`
+.foo-bar {
+  color: red;
+}
+`.trim(), {from: 'test.css'}).catch((e) => console.error(e.toString()));
+
+// CssSyntaxError: classValidator: ./test.css:1:5: classes may not have underscores or dashes in them
+//
+// > 1 | .foo-bar {
+//     |     ^
+//   2 |   color: red;
+//   3 | }
+```
+
+#### Synchronous Error Example
+
+```js
+let processor = (root) => {
+    root.walkClasses((classNode) => {
+        if (/.*[-_]/.test(classNode.value)) {
+            let msg = "classes may not have underscores or dashes in them";
+            throw root.error(msg, {
+                index: classNode.sourceIndex,
+                word: classNode.value
+            });
+        }
+    });
+};
+
+const postcss = require("postcss");
+const parser = require("postcss-selector-parser");
+const selectorProcessor = parser(processor);
+const plugin = postcss.plugin('classValidator', (options) => {
+    return (root) => {
+        root.walkRules(rule => {
+            selectorProcessor.processSync(rule);
+        });
+    };
+});
+postcss(plugin()).process(`
+.foo-bar {
+  color: red;
+}
+`.trim(), {from: 'test.css'}).catch((e) => console.error(e.toString()));
+
+// CssSyntaxError: classValidator: ./test.css:1:5: classes may not have underscores or dashes in them
+//
+// > 1 | .foo-bar {
+//     |     ^
+//   2 |   color: red;
+//   3 | }
+```
diff --git a/node_modules/postcss-selector-parser/LICENSE-MIT b/node_modules/postcss-selector-parser/LICENSE-MIT
new file mode 100644
index 000000000..fd0e863a6
--- /dev/null
+++ b/node_modules/postcss-selector-parser/LICENSE-MIT
@@ -0,0 +1,22 @@
+Copyright (c) Ben Briggs <beneb.info@gmail.com> (http://beneb.info)
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/node_modules/postcss-selector-parser/dist/index.js b/node_modules/postcss-selector-parser/dist/index.js
new file mode 100644
index 000000000..6e76a32bd
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/index.js
@@ -0,0 +1,24 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _processor = _interopRequireDefault(require("./processor"));
+
+var selectors = _interopRequireWildcard(require("./selectors"));
+
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+var parser = function parser(processor) {
+  return new _processor["default"](processor);
+};
+
+Object.assign(parser, selectors);
+delete parser.__esModule;
+var _default = parser;
+exports["default"] = _default;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/parser.js b/node_modules/postcss-selector-parser/dist/parser.js
new file mode 100644
index 000000000..e0451de00
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/parser.js
@@ -0,0 +1,1243 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _root = _interopRequireDefault(require("./selectors/root"));
+
+var _selector = _interopRequireDefault(require("./selectors/selector"));
+
+var _className = _interopRequireDefault(require("./selectors/className"));
+
+var _comment = _interopRequireDefault(require("./selectors/comment"));
+
+var _id = _interopRequireDefault(require("./selectors/id"));
+
+var _tag = _interopRequireDefault(require("./selectors/tag"));
+
+var _string = _interopRequireDefault(require("./selectors/string"));
+
+var _pseudo = _interopRequireDefault(require("./selectors/pseudo"));
+
+var _attribute = _interopRequireWildcard(require("./selectors/attribute"));
+
+var _universal = _interopRequireDefault(require("./selectors/universal"));
+
+var _combinator = _interopRequireDefault(require("./selectors/combinator"));
+
+var _nesting = _interopRequireDefault(require("./selectors/nesting"));
+
+var _sortAscending = _interopRequireDefault(require("./sortAscending"));
+
+var _tokenize = _interopRequireWildcard(require("./tokenize"));
+
+var tokens = _interopRequireWildcard(require("./tokenTypes"));
+
+var types = _interopRequireWildcard(require("./selectors/types"));
+
+var _util = require("./util");
+
+var _WHITESPACE_TOKENS, _Object$assign;
+
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+var WHITESPACE_TOKENS = (_WHITESPACE_TOKENS = {}, _WHITESPACE_TOKENS[tokens.space] = true, _WHITESPACE_TOKENS[tokens.cr] = true, _WHITESPACE_TOKENS[tokens.feed] = true, _WHITESPACE_TOKENS[tokens.newline] = true, _WHITESPACE_TOKENS[tokens.tab] = true, _WHITESPACE_TOKENS);
+var WHITESPACE_EQUIV_TOKENS = Object.assign({}, WHITESPACE_TOKENS, (_Object$assign = {}, _Object$assign[tokens.comment] = true, _Object$assign));
+
+function tokenStart(token) {
+  return {
+    line: token[_tokenize.FIELDS.START_LINE],
+    column: token[_tokenize.FIELDS.START_COL]
+  };
+}
+
+function tokenEnd(token) {
+  return {
+    line: token[_tokenize.FIELDS.END_LINE],
+    column: token[_tokenize.FIELDS.END_COL]
+  };
+}
+
+function getSource(startLine, startColumn, endLine, endColumn) {
+  return {
+    start: {
+      line: startLine,
+      column: startColumn
+    },
+    end: {
+      line: endLine,
+      column: endColumn
+    }
+  };
+}
+
+function getTokenSource(token) {
+  return getSource(token[_tokenize.FIELDS.START_LINE], token[_tokenize.FIELDS.START_COL], token[_tokenize.FIELDS.END_LINE], token[_tokenize.FIELDS.END_COL]);
+}
+
+function getTokenSourceSpan(startToken, endToken) {
+  if (!startToken) {
+    return undefined;
+  }
+
+  return getSource(startToken[_tokenize.FIELDS.START_LINE], startToken[_tokenize.FIELDS.START_COL], endToken[_tokenize.FIELDS.END_LINE], endToken[_tokenize.FIELDS.END_COL]);
+}
+
+function unescapeProp(node, prop) {
+  var value = node[prop];
+
+  if (typeof value !== "string") {
+    return;
+  }
+
+  if (value.indexOf("\\") !== -1) {
+    (0, _util.ensureObject)(node, 'raws');
+    node[prop] = (0, _util.unesc)(value);
+
+    if (node.raws[prop] === undefined) {
+      node.raws[prop] = value;
+    }
+  }
+
+  return node;
+}
+
+function indexesOf(array, item) {
+  var i = -1;
+  var indexes = [];
+
+  while ((i = array.indexOf(item, i + 1)) !== -1) {
+    indexes.push(i);
+  }
+
+  return indexes;
+}
+
+function uniqs() {
+  var list = Array.prototype.concat.apply([], arguments);
+  return list.filter(function (item, i) {
+    return i === list.indexOf(item);
+  });
+}
+
+var Parser = /*#__PURE__*/function () {
+  function Parser(rule, options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    this.rule = rule;
+    this.options = Object.assign({
+      lossy: false,
+      safe: false
+    }, options);
+    this.position = 0;
+    this.css = typeof this.rule === 'string' ? this.rule : this.rule.selector;
+    this.tokens = (0, _tokenize["default"])({
+      css: this.css,
+      error: this._errorGenerator(),
+      safe: this.options.safe
+    });
+    var rootSource = getTokenSourceSpan(this.tokens[0], this.tokens[this.tokens.length - 1]);
+    this.root = new _root["default"]({
+      source: rootSource
+    });
+    this.root.errorGenerator = this._errorGenerator();
+    var selector = new _selector["default"]({
+      source: {
+        start: {
+          line: 1,
+          column: 1
+        }
+      }
+    });
+    this.root.append(selector);
+    this.current = selector;
+    this.loop();
+  }
+
+  var _proto = Parser.prototype;
+
+  _proto._errorGenerator = function _errorGenerator() {
+    var _this = this;
+
+    return function (message, errorOptions) {
+      if (typeof _this.rule === 'string') {
+        return new Error(message);
+      }
+
+      return _this.rule.error(message, errorOptions);
+    };
+  };
+
+  _proto.attribute = function attribute() {
+    var attr = [];
+    var startingToken = this.currToken;
+    this.position++;
+
+    while (this.position < this.tokens.length && this.currToken[_tokenize.FIELDS.TYPE] !== tokens.closeSquare) {
+      attr.push(this.currToken);
+      this.position++;
+    }
+
+    if (this.currToken[_tokenize.FIELDS.TYPE] !== tokens.closeSquare) {
+      return this.expected('closing square bracket', this.currToken[_tokenize.FIELDS.START_POS]);
+    }
+
+    var len = attr.length;
+    var node = {
+      source: getSource(startingToken[1], startingToken[2], this.currToken[3], this.currToken[4]),
+      sourceIndex: startingToken[_tokenize.FIELDS.START_POS]
+    };
+
+    if (len === 1 && !~[tokens.word].indexOf(attr[0][_tokenize.FIELDS.TYPE])) {
+      return this.expected('attribute', attr[0][_tokenize.FIELDS.START_POS]);
+    }
+
+    var pos = 0;
+    var spaceBefore = '';
+    var commentBefore = '';
+    var lastAdded = null;
+    var spaceAfterMeaningfulToken = false;
+
+    while (pos < len) {
+      var token = attr[pos];
+      var content = this.content(token);
+      var next = attr[pos + 1];
+
+      switch (token[_tokenize.FIELDS.TYPE]) {
+        case tokens.space:
+          // if (
+          //     len === 1 ||
+          //     pos === 0 && this.content(next) === '|'
+          // ) {
+          //     return this.expected('attribute', token[TOKEN.START_POS], content);
+          // }
+          spaceAfterMeaningfulToken = true;
+
+          if (this.options.lossy) {
+            break;
+          }
+
+          if (lastAdded) {
+            (0, _util.ensureObject)(node, 'spaces', lastAdded);
+            var prevContent = node.spaces[lastAdded].after || '';
+            node.spaces[lastAdded].after = prevContent + content;
+            var existingComment = (0, _util.getProp)(node, 'raws', 'spaces', lastAdded, 'after') || null;
+
+            if (existingComment) {
+              node.raws.spaces[lastAdded].after = existingComment + content;
+            }
+          } else {
+            spaceBefore = spaceBefore + content;
+            commentBefore = commentBefore + content;
+          }
+
+          break;
+
+        case tokens.asterisk:
+          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
+            node.operator = content;
+            lastAdded = 'operator';
+          } else if ((!node.namespace || lastAdded === "namespace" && !spaceAfterMeaningfulToken) && next) {
+            if (spaceBefore) {
+              (0, _util.ensureObject)(node, 'spaces', 'attribute');
+              node.spaces.attribute.before = spaceBefore;
+              spaceBefore = '';
+            }
+
+            if (commentBefore) {
+              (0, _util.ensureObject)(node, 'raws', 'spaces', 'attribute');
+              node.raws.spaces.attribute.before = spaceBefore;
+              commentBefore = '';
+            }
+
+            node.namespace = (node.namespace || "") + content;
+            var rawValue = (0, _util.getProp)(node, 'raws', 'namespace') || null;
+
+            if (rawValue) {
+              node.raws.namespace += content;
+            }
+
+            lastAdded = 'namespace';
+          }
+
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.dollar:
+          if (lastAdded === "value") {
+            var oldRawValue = (0, _util.getProp)(node, 'raws', 'value');
+            node.value += "$";
+
+            if (oldRawValue) {
+              node.raws.value = oldRawValue + "$";
+            }
+
+            break;
+          }
+
+        // Falls through
+
+        case tokens.caret:
+          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
+            node.operator = content;
+            lastAdded = 'operator';
+          }
+
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.combinator:
+          if (content === '~' && next[_tokenize.FIELDS.TYPE] === tokens.equals) {
+            node.operator = content;
+            lastAdded = 'operator';
+          }
+
+          if (content !== '|') {
+            spaceAfterMeaningfulToken = false;
+            break;
+          }
+
+          if (next[_tokenize.FIELDS.TYPE] === tokens.equals) {
+            node.operator = content;
+            lastAdded = 'operator';
+          } else if (!node.namespace && !node.attribute) {
+            node.namespace = true;
+          }
+
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.word:
+          if (next && this.content(next) === '|' && attr[pos + 2] && attr[pos + 2][_tokenize.FIELDS.TYPE] !== tokens.equals && // this look-ahead probably fails with comment nodes involved.
+          !node.operator && !node.namespace) {
+            node.namespace = content;
+            lastAdded = 'namespace';
+          } else if (!node.attribute || lastAdded === "attribute" && !spaceAfterMeaningfulToken) {
+            if (spaceBefore) {
+              (0, _util.ensureObject)(node, 'spaces', 'attribute');
+              node.spaces.attribute.before = spaceBefore;
+              spaceBefore = '';
+            }
+
+            if (commentBefore) {
+              (0, _util.ensureObject)(node, 'raws', 'spaces', 'attribute');
+              node.raws.spaces.attribute.before = commentBefore;
+              commentBefore = '';
+            }
+
+            node.attribute = (node.attribute || "") + content;
+
+            var _rawValue = (0, _util.getProp)(node, 'raws', 'attribute') || null;
+
+            if (_rawValue) {
+              node.raws.attribute += content;
+            }
+
+            lastAdded = 'attribute';
+          } else if (!node.value && node.value !== "" || lastAdded === "value" && !spaceAfterMeaningfulToken) {
+            var _unescaped = (0, _util.unesc)(content);
+
+            var _oldRawValue = (0, _util.getProp)(node, 'raws', 'value') || '';
+
+            var oldValue = node.value || '';
+            node.value = oldValue + _unescaped;
+            node.quoteMark = null;
+
+            if (_unescaped !== content || _oldRawValue) {
+              (0, _util.ensureObject)(node, 'raws');
+              node.raws.value = (_oldRawValue || oldValue) + content;
+            }
+
+            lastAdded = 'value';
+          } else {
+            var insensitive = content === 'i' || content === "I";
+
+            if ((node.value || node.value === '') && (node.quoteMark || spaceAfterMeaningfulToken)) {
+              node.insensitive = insensitive;
+
+              if (!insensitive || content === "I") {
+                (0, _util.ensureObject)(node, 'raws');
+                node.raws.insensitiveFlag = content;
+              }
+
+              lastAdded = 'insensitive';
+
+              if (spaceBefore) {
+                (0, _util.ensureObject)(node, 'spaces', 'insensitive');
+                node.spaces.insensitive.before = spaceBefore;
+                spaceBefore = '';
+              }
+
+              if (commentBefore) {
+                (0, _util.ensureObject)(node, 'raws', 'spaces', 'insensitive');
+                node.raws.spaces.insensitive.before = commentBefore;
+                commentBefore = '';
+              }
+            } else if (node.value || node.value === '') {
+              lastAdded = 'value';
+              node.value += content;
+
+              if (node.raws.value) {
+                node.raws.value += content;
+              }
+            }
+          }
+
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.str:
+          if (!node.attribute || !node.operator) {
+            return this.error("Expected an attribute followed by an operator preceding the string.", {
+              index: token[_tokenize.FIELDS.START_POS]
+            });
+          }
+
+          var _unescapeValue = (0, _attribute.unescapeValue)(content),
+              unescaped = _unescapeValue.unescaped,
+              quoteMark = _unescapeValue.quoteMark;
+
+          node.value = unescaped;
+          node.quoteMark = quoteMark;
+          lastAdded = 'value';
+          (0, _util.ensureObject)(node, 'raws');
+          node.raws.value = content;
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.equals:
+          if (!node.attribute) {
+            return this.expected('attribute', token[_tokenize.FIELDS.START_POS], content);
+          }
+
+          if (node.value) {
+            return this.error('Unexpected "=" found; an operator was already defined.', {
+              index: token[_tokenize.FIELDS.START_POS]
+            });
+          }
+
+          node.operator = node.operator ? node.operator + content : content;
+          lastAdded = 'operator';
+          spaceAfterMeaningfulToken = false;
+          break;
+
+        case tokens.comment:
+          if (lastAdded) {
+            if (spaceAfterMeaningfulToken || next && next[_tokenize.FIELDS.TYPE] === tokens.space || lastAdded === 'insensitive') {
+              var lastComment = (0, _util.getProp)(node, 'spaces', lastAdded, 'after') || '';
+              var rawLastComment = (0, _util.getProp)(node, 'raws', 'spaces', lastAdded, 'after') || lastComment;
+              (0, _util.ensureObject)(node, 'raws', 'spaces', lastAdded);
+              node.raws.spaces[lastAdded].after = rawLastComment + content;
+            } else {
+              var lastValue = node[lastAdded] || '';
+              var rawLastValue = (0, _util.getProp)(node, 'raws', lastAdded) || lastValue;
+              (0, _util.ensureObject)(node, 'raws');
+              node.raws[lastAdded] = rawLastValue + content;
+            }
+          } else {
+            commentBefore = commentBefore + content;
+          }
+
+          break;
+
+        default:
+          return this.error("Unexpected \"" + content + "\" found.", {
+            index: token[_tokenize.FIELDS.START_POS]
+          });
+      }
+
+      pos++;
+    }
+
+    unescapeProp(node, "attribute");
+    unescapeProp(node, "namespace");
+    this.newNode(new _attribute["default"](node));
+    this.position++;
+  }
+  /**
+   * return a node containing meaningless garbage up to (but not including) the specified token position.
+   * if the token position is negative, all remaining tokens are consumed.
+   *
+   * This returns an array containing a single string node if all whitespace,
+   * otherwise an array of comment nodes with space before and after.
+   *
+   * These tokens are not added to the current selector, the caller can add them or use them to amend
+   * a previous node's space metadata.
+   *
+   * In lossy mode, this returns only comments.
+   */
+  ;
+
+  _proto.parseWhitespaceEquivalentTokens = function parseWhitespaceEquivalentTokens(stopPosition) {
+    if (stopPosition < 0) {
+      stopPosition = this.tokens.length;
+    }
+
+    var startPosition = this.position;
+    var nodes = [];
+    var space = "";
+    var lastComment = undefined;
+
+    do {
+      if (WHITESPACE_TOKENS[this.currToken[_tokenize.FIELDS.TYPE]]) {
+        if (!this.options.lossy) {
+          space += this.content();
+        }
+      } else if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.comment) {
+        var spaces = {};
+
+        if (space) {
+          spaces.before = space;
+          space = "";
+        }
+
+        lastComment = new _comment["default"]({
+          value: this.content(),
+          source: getTokenSource(this.currToken),
+          sourceIndex: this.currToken[_tokenize.FIELDS.START_POS],
+          spaces: spaces
+        });
+        nodes.push(lastComment);
+      }
+    } while (++this.position < stopPosition);
+
+    if (space) {
+      if (lastComment) {
+        lastComment.spaces.after = space;
+      } else if (!this.options.lossy) {
+        var firstToken = this.tokens[startPosition];
+        var lastToken = this.tokens[this.position - 1];
+        nodes.push(new _string["default"]({
+          value: '',
+          source: getSource(firstToken[_tokenize.FIELDS.START_LINE], firstToken[_tokenize.FIELDS.START_COL], lastToken[_tokenize.FIELDS.END_LINE], lastToken[_tokenize.FIELDS.END_COL]),
+          sourceIndex: firstToken[_tokenize.FIELDS.START_POS],
+          spaces: {
+            before: space,
+            after: ''
+          }
+        }));
+      }
+    }
+
+    return nodes;
+  }
+  /**
+   * 
+   * @param {*} nodes 
+   */
+  ;
+
+  _proto.convertWhitespaceNodesToSpace = function convertWhitespaceNodesToSpace(nodes, requiredSpace) {
+    var _this2 = this;
+
+    if (requiredSpace === void 0) {
+      requiredSpace = false;
+    }
+
+    var space = "";
+    var rawSpace = "";
+    nodes.forEach(function (n) {
+      var spaceBefore = _this2.lossySpace(n.spaces.before, requiredSpace);
+
+      var rawSpaceBefore = _this2.lossySpace(n.rawSpaceBefore, requiredSpace);
+
+      space += spaceBefore + _this2.lossySpace(n.spaces.after, requiredSpace && spaceBefore.length === 0);
+      rawSpace += spaceBefore + n.value + _this2.lossySpace(n.rawSpaceAfter, requiredSpace && rawSpaceBefore.length === 0);
+    });
+
+    if (rawSpace === space) {
+      rawSpace = undefined;
+    }
+
+    var result = {
+      space: space,
+      rawSpace: rawSpace
+    };
+    return result;
+  };
+
+  _proto.isNamedCombinator = function isNamedCombinator(position) {
+    if (position === void 0) {
+      position = this.position;
+    }
+
+    return this.tokens[position + 0] && this.tokens[position + 0][_tokenize.FIELDS.TYPE] === tokens.slash && this.tokens[position + 1] && this.tokens[position + 1][_tokenize.FIELDS.TYPE] === tokens.word && this.tokens[position + 2] && this.tokens[position + 2][_tokenize.FIELDS.TYPE] === tokens.slash;
+  };
+
+  _proto.namedCombinator = function namedCombinator() {
+    if (this.isNamedCombinator()) {
+      var nameRaw = this.content(this.tokens[this.position + 1]);
+      var name = (0, _util.unesc)(nameRaw).toLowerCase();
+      var raws = {};
+
+      if (name !== nameRaw) {
+        raws.value = "/" + nameRaw + "/";
+      }
+
+      var node = new _combinator["default"]({
+        value: "/" + name + "/",
+        source: getSource(this.currToken[_tokenize.FIELDS.START_LINE], this.currToken[_tokenize.FIELDS.START_COL], this.tokens[this.position + 2][_tokenize.FIELDS.END_LINE], this.tokens[this.position + 2][_tokenize.FIELDS.END_COL]),
+        sourceIndex: this.currToken[_tokenize.FIELDS.START_POS],
+        raws: raws
+      });
+      this.position = this.position + 3;
+      return node;
+    } else {
+      this.unexpected();
+    }
+  };
+
+  _proto.combinator = function combinator() {
+    var _this3 = this;
+
+    if (this.content() === '|') {
+      return this.namespace();
+    } // We need to decide between a space that's a descendant combinator and meaningless whitespace at the end of a selector.
+
+
+    var nextSigTokenPos = this.locateNextMeaningfulToken(this.position);
+
+    if (nextSigTokenPos < 0 || this.tokens[nextSigTokenPos][_tokenize.FIELDS.TYPE] === tokens.comma) {
+      var nodes = this.parseWhitespaceEquivalentTokens(nextSigTokenPos);
+
+      if (nodes.length > 0) {
+        var last = this.current.last;
+
+        if (last) {
+          var _this$convertWhitespa = this.convertWhitespaceNodesToSpace(nodes),
+              space = _this$convertWhitespa.space,
+              rawSpace = _this$convertWhitespa.rawSpace;
+
+          if (rawSpace !== undefined) {
+            last.rawSpaceAfter += rawSpace;
+          }
+
+          last.spaces.after += space;
+        } else {
+          nodes.forEach(function (n) {
+            return _this3.newNode(n);
+          });
+        }
+      }
+
+      return;
+    }
+
+    var firstToken = this.currToken;
+    var spaceOrDescendantSelectorNodes = undefined;
+
+    if (nextSigTokenPos > this.position) {
+      spaceOrDescendantSelectorNodes = this.parseWhitespaceEquivalentTokens(nextSigTokenPos);
+    }
+
+    var node;
+
+    if (this.isNamedCombinator()) {
+      node = this.namedCombinator();
+    } else if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.combinator) {
+      node = new _combinator["default"]({
+        value: this.content(),
+        source: getTokenSource(this.currToken),
+        sourceIndex: this.currToken[_tokenize.FIELDS.START_POS]
+      });
+      this.position++;
+    } else if (WHITESPACE_TOKENS[this.currToken[_tokenize.FIELDS.TYPE]]) {// pass
+    } else if (!spaceOrDescendantSelectorNodes) {
+      this.unexpected();
+    }
+
+    if (node) {
+      if (spaceOrDescendantSelectorNodes) {
+        var _this$convertWhitespa2 = this.convertWhitespaceNodesToSpace(spaceOrDescendantSelectorNodes),
+            _space = _this$convertWhitespa2.space,
+            _rawSpace = _this$convertWhitespa2.rawSpace;
+
+        node.spaces.before = _space;
+        node.rawSpaceBefore = _rawSpace;
+      }
+    } else {
+      // descendant combinator
+      var _this$convertWhitespa3 = this.convertWhitespaceNodesToSpace(spaceOrDescendantSelectorNodes, true),
+          _space2 = _this$convertWhitespa3.space,
+          _rawSpace2 = _this$convertWhitespa3.rawSpace;
+
+      if (!_rawSpace2) {
+        _rawSpace2 = _space2;
+      }
+
+      var spaces = {};
+      var raws = {
+        spaces: {}
+      };
+
+      if (_space2.endsWith(' ') && _rawSpace2.endsWith(' ')) {
+        spaces.before = _space2.slice(0, _space2.length - 1);
+        raws.spaces.before = _rawSpace2.slice(0, _rawSpace2.length - 1);
+      } else if (_space2.startsWith(' ') && _rawSpace2.startsWith(' ')) {
+        spaces.after = _space2.slice(1);
+        raws.spaces.after = _rawSpace2.slice(1);
+      } else {
+        raws.value = _rawSpace2;
+      }
+
+      node = new _combinator["default"]({
+        value: ' ',
+        source: getTokenSourceSpan(firstToken, this.tokens[this.position - 1]),
+        sourceIndex: firstToken[_tokenize.FIELDS.START_POS],
+        spaces: spaces,
+        raws: raws
+      });
+    }
+
+    if (this.currToken && this.currToken[_tokenize.FIELDS.TYPE] === tokens.space) {
+      node.spaces.after = this.optionalSpace(this.content());
+      this.position++;
+    }
+
+    return this.newNode(node);
+  };
+
+  _proto.comma = function comma() {
+    if (this.position === this.tokens.length - 1) {
+      this.root.trailingComma = true;
+      this.position++;
+      return;
+    }
+
+    this.current._inferEndPosition();
+
+    var selector = new _selector["default"]({
+      source: {
+        start: tokenStart(this.tokens[this.position + 1])
+      }
+    });
+    this.current.parent.append(selector);
+    this.current = selector;
+    this.position++;
+  };
+
+  _proto.comment = function comment() {
+    var current = this.currToken;
+    this.newNode(new _comment["default"]({
+      value: this.content(),
+      source: getTokenSource(current),
+      sourceIndex: current[_tokenize.FIELDS.START_POS]
+    }));
+    this.position++;
+  };
+
+  _proto.error = function error(message, opts) {
+    throw this.root.error(message, opts);
+  };
+
+  _proto.missingBackslash = function missingBackslash() {
+    return this.error('Expected a backslash preceding the semicolon.', {
+      index: this.currToken[_tokenize.FIELDS.START_POS]
+    });
+  };
+
+  _proto.missingParenthesis = function missingParenthesis() {
+    return this.expected('opening parenthesis', this.currToken[_tokenize.FIELDS.START_POS]);
+  };
+
+  _proto.missingSquareBracket = function missingSquareBracket() {
+    return this.expected('opening square bracket', this.currToken[_tokenize.FIELDS.START_POS]);
+  };
+
+  _proto.unexpected = function unexpected() {
+    return this.error("Unexpected '" + this.content() + "'. Escaping special characters with \\ may help.", this.currToken[_tokenize.FIELDS.START_POS]);
+  };
+
+  _proto.namespace = function namespace() {
+    var before = this.prevToken && this.content(this.prevToken) || true;
+
+    if (this.nextToken[_tokenize.FIELDS.TYPE] === tokens.word) {
+      this.position++;
+      return this.word(before);
+    } else if (this.nextToken[_tokenize.FIELDS.TYPE] === tokens.asterisk) {
+      this.position++;
+      return this.universal(before);
+    }
+  };
+
+  _proto.nesting = function nesting() {
+    if (this.nextToken) {
+      var nextContent = this.content(this.nextToken);
+
+      if (nextContent === "|") {
+        this.position++;
+        return;
+      }
+    }
+
+    var current = this.currToken;
+    this.newNode(new _nesting["default"]({
+      value: this.content(),
+      source: getTokenSource(current),
+      sourceIndex: current[_tokenize.FIELDS.START_POS]
+    }));
+    this.position++;
+  };
+
+  _proto.parentheses = function parentheses() {
+    var last = this.current.last;
+    var unbalanced = 1;
+    this.position++;
+
+    if (last && last.type === types.PSEUDO) {
+      var selector = new _selector["default"]({
+        source: {
+          start: tokenStart(this.tokens[this.position - 1])
+        }
+      });
+      var cache = this.current;
+      last.append(selector);
+      this.current = selector;
+
+      while (this.position < this.tokens.length && unbalanced) {
+        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
+          unbalanced++;
+        }
+
+        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
+          unbalanced--;
+        }
+
+        if (unbalanced) {
+          this.parse();
+        } else {
+          this.current.source.end = tokenEnd(this.currToken);
+          this.current.parent.source.end = tokenEnd(this.currToken);
+          this.position++;
+        }
+      }
+
+      this.current = cache;
+    } else {
+      // I think this case should be an error. It's used to implement a basic parse of media queries
+      // but I don't think it's a good idea.
+      var parenStart = this.currToken;
+      var parenValue = "(";
+      var parenEnd;
+
+      while (this.position < this.tokens.length && unbalanced) {
+        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
+          unbalanced++;
+        }
+
+        if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
+          unbalanced--;
+        }
+
+        parenEnd = this.currToken;
+        parenValue += this.parseParenthesisToken(this.currToken);
+        this.position++;
+      }
+
+      if (last) {
+        last.appendToPropertyAndEscape("value", parenValue, parenValue);
+      } else {
+        this.newNode(new _string["default"]({
+          value: parenValue,
+          source: getSource(parenStart[_tokenize.FIELDS.START_LINE], parenStart[_tokenize.FIELDS.START_COL], parenEnd[_tokenize.FIELDS.END_LINE], parenEnd[_tokenize.FIELDS.END_COL]),
+          sourceIndex: parenStart[_tokenize.FIELDS.START_POS]
+        }));
+      }
+    }
+
+    if (unbalanced) {
+      return this.expected('closing parenthesis', this.currToken[_tokenize.FIELDS.START_POS]);
+    }
+  };
+
+  _proto.pseudo = function pseudo() {
+    var _this4 = this;
+
+    var pseudoStr = '';
+    var startingToken = this.currToken;
+
+    while (this.currToken && this.currToken[_tokenize.FIELDS.TYPE] === tokens.colon) {
+      pseudoStr += this.content();
+      this.position++;
+    }
+
+    if (!this.currToken) {
+      return this.expected(['pseudo-class', 'pseudo-element'], this.position - 1);
+    }
+
+    if (this.currToken[_tokenize.FIELDS.TYPE] === tokens.word) {
+      this.splitWord(false, function (first, length) {
+        pseudoStr += first;
+
+        _this4.newNode(new _pseudo["default"]({
+          value: pseudoStr,
+          source: getTokenSourceSpan(startingToken, _this4.currToken),
+          sourceIndex: startingToken[_tokenize.FIELDS.START_POS]
+        }));
+
+        if (length > 1 && _this4.nextToken && _this4.nextToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis) {
+          _this4.error('Misplaced parenthesis.', {
+            index: _this4.nextToken[_tokenize.FIELDS.START_POS]
+          });
+        }
+      });
+    } else {
+      return this.expected(['pseudo-class', 'pseudo-element'], this.currToken[_tokenize.FIELDS.START_POS]);
+    }
+  };
+
+  _proto.space = function space() {
+    var content = this.content(); // Handle space before and after the selector
+
+    if (this.position === 0 || this.prevToken[_tokenize.FIELDS.TYPE] === tokens.comma || this.prevToken[_tokenize.FIELDS.TYPE] === tokens.openParenthesis || this.current.nodes.every(function (node) {
+      return node.type === 'comment';
+    })) {
+      this.spaces = this.optionalSpace(content);
+      this.position++;
+    } else if (this.position === this.tokens.length - 1 || this.nextToken[_tokenize.FIELDS.TYPE] === tokens.comma || this.nextToken[_tokenize.FIELDS.TYPE] === tokens.closeParenthesis) {
+      this.current.last.spaces.after = this.optionalSpace(content);
+      this.position++;
+    } else {
+      this.combinator();
+    }
+  };
+
+  _proto.string = function string() {
+    var current = this.currToken;
+    this.newNode(new _string["default"]({
+      value: this.content(),
+      source: getTokenSource(current),
+      sourceIndex: current[_tokenize.FIELDS.START_POS]
+    }));
+    this.position++;
+  };
+
+  _proto.universal = function universal(namespace) {
+    var nextToken = this.nextToken;
+
+    if (nextToken && this.content(nextToken) === '|') {
+      this.position++;
+      return this.namespace();
+    }
+
+    var current = this.currToken;
+    this.newNode(new _universal["default"]({
+      value: this.content(),
+      source: getTokenSource(current),
+      sourceIndex: current[_tokenize.FIELDS.START_POS]
+    }), namespace);
+    this.position++;
+  };
+
+  _proto.splitWord = function splitWord(namespace, firstCallback) {
+    var _this5 = this;
+
+    var nextToken = this.nextToken;
+    var word = this.content();
+
+    while (nextToken && ~[tokens.dollar, tokens.caret, tokens.equals, tokens.word].indexOf(nextToken[_tokenize.FIELDS.TYPE])) {
+      this.position++;
+      var current = this.content();
+      word += current;
+
+      if (current.lastIndexOf('\\') === current.length - 1) {
+        var next = this.nextToken;
+
+        if (next && next[_tokenize.FIELDS.TYPE] === tokens.space) {
+          word += this.requiredSpace(this.content(next));
+          this.position++;
+        }
+      }
+
+      nextToken = this.nextToken;
+    }
+
+    var hasClass = indexesOf(word, '.').filter(function (i) {
+      // Allow escaped dot within class name
+      var escapedDot = word[i - 1] === '\\'; // Allow decimal numbers percent in @keyframes
+
+      var isKeyframesPercent = /^\d+\.\d+%$/.test(word);
+      return !escapedDot && !isKeyframesPercent;
+    });
+    var hasId = indexesOf(word, '#').filter(function (i) {
+      return word[i - 1] !== '\\';
+    }); // Eliminate Sass interpolations from the list of id indexes
+
+    var interpolations = indexesOf(word, '#{');
+
+    if (interpolations.length) {
+      hasId = hasId.filter(function (hashIndex) {
+        return !~interpolations.indexOf(hashIndex);
+      });
+    }
+
+    var indices = (0, _sortAscending["default"])(uniqs([0].concat(hasClass, hasId)));
+    indices.forEach(function (ind, i) {
+      var index = indices[i + 1] || word.length;
+      var value = word.slice(ind, index);
+
+      if (i === 0 && firstCallback) {
+        return firstCallback.call(_this5, value, indices.length);
+      }
+
+      var node;
+      var current = _this5.currToken;
+      var sourceIndex = current[_tokenize.FIELDS.START_POS] + indices[i];
+      var source = getSource(current[1], current[2] + ind, current[3], current[2] + (index - 1));
+
+      if (~hasClass.indexOf(ind)) {
+        var classNameOpts = {
+          value: value.slice(1),
+          source: source,
+          sourceIndex: sourceIndex
+        };
+        node = new _className["default"](unescapeProp(classNameOpts, "value"));
+      } else if (~hasId.indexOf(ind)) {
+        var idOpts = {
+          value: value.slice(1),
+          source: source,
+          sourceIndex: sourceIndex
+        };
+        node = new _id["default"](unescapeProp(idOpts, "value"));
+      } else {
+        var tagOpts = {
+          value: value,
+          source: source,
+          sourceIndex: sourceIndex
+        };
+        unescapeProp(tagOpts, "value");
+        node = new _tag["default"](tagOpts);
+      }
+
+      _this5.newNode(node, namespace); // Ensure that the namespace is used only once
+
+
+      namespace = null;
+    });
+    this.position++;
+  };
+
+  _proto.word = function word(namespace) {
+    var nextToken = this.nextToken;
+
+    if (nextToken && this.content(nextToken) === '|') {
+      this.position++;
+      return this.namespace();
+    }
+
+    return this.splitWord(namespace);
+  };
+
+  _proto.loop = function loop() {
+    while (this.position < this.tokens.length) {
+      this.parse(true);
+    }
+
+    this.current._inferEndPosition();
+
+    return this.root;
+  };
+
+  _proto.parse = function parse(throwOnParenthesis) {
+    switch (this.currToken[_tokenize.FIELDS.TYPE]) {
+      case tokens.space:
+        this.space();
+        break;
+
+      case tokens.comment:
+        this.comment();
+        break;
+
+      case tokens.openParenthesis:
+        this.parentheses();
+        break;
+
+      case tokens.closeParenthesis:
+        if (throwOnParenthesis) {
+          this.missingParenthesis();
+        }
+
+        break;
+
+      case tokens.openSquare:
+        this.attribute();
+        break;
+
+      case tokens.dollar:
+      case tokens.caret:
+      case tokens.equals:
+      case tokens.word:
+        this.word();
+        break;
+
+      case tokens.colon:
+        this.pseudo();
+        break;
+
+      case tokens.comma:
+        this.comma();
+        break;
+
+      case tokens.asterisk:
+        this.universal();
+        break;
+
+      case tokens.ampersand:
+        this.nesting();
+        break;
+
+      case tokens.slash:
+      case tokens.combinator:
+        this.combinator();
+        break;
+
+      case tokens.str:
+        this.string();
+        break;
+      // These cases throw; no break needed.
+
+      case tokens.closeSquare:
+        this.missingSquareBracket();
+
+      case tokens.semicolon:
+        this.missingBackslash();
+
+      default:
+        this.unexpected();
+    }
+  }
+  /**
+   * Helpers
+   */
+  ;
+
+  _proto.expected = function expected(description, index, found) {
+    if (Array.isArray(description)) {
+      var last = description.pop();
+      description = description.join(', ') + " or " + last;
+    }
+
+    var an = /^[aeiou]/.test(description[0]) ? 'an' : 'a';
+
+    if (!found) {
+      return this.error("Expected " + an + " " + description + ".", {
+        index: index
+      });
+    }
+
+    return this.error("Expected " + an + " " + description + ", found \"" + found + "\" instead.", {
+      index: index
+    });
+  };
+
+  _proto.requiredSpace = function requiredSpace(space) {
+    return this.options.lossy ? ' ' : space;
+  };
+
+  _proto.optionalSpace = function optionalSpace(space) {
+    return this.options.lossy ? '' : space;
+  };
+
+  _proto.lossySpace = function lossySpace(space, required) {
+    if (this.options.lossy) {
+      return required ? ' ' : '';
+    } else {
+      return space;
+    }
+  };
+
+  _proto.parseParenthesisToken = function parseParenthesisToken(token) {
+    var content = this.content(token);
+
+    if (token[_tokenize.FIELDS.TYPE] === tokens.space) {
+      return this.requiredSpace(content);
+    } else {
+      return content;
+    }
+  };
+
+  _proto.newNode = function newNode(node, namespace) {
+    if (namespace) {
+      if (/^ +$/.test(namespace)) {
+        if (!this.options.lossy) {
+          this.spaces = (this.spaces || '') + namespace;
+        }
+
+        namespace = true;
+      }
+
+      node.namespace = namespace;
+      unescapeProp(node, "namespace");
+    }
+
+    if (this.spaces) {
+      node.spaces.before = this.spaces;
+      this.spaces = '';
+    }
+
+    return this.current.append(node);
+  };
+
+  _proto.content = function content(token) {
+    if (token === void 0) {
+      token = this.currToken;
+    }
+
+    return this.css.slice(token[_tokenize.FIELDS.START_POS], token[_tokenize.FIELDS.END_POS]);
+  };
+
+  /**
+   * returns the index of the next non-whitespace, non-comment token.
+   * returns -1 if no meaningful token is found.
+   */
+  _proto.locateNextMeaningfulToken = function locateNextMeaningfulToken(startPosition) {
+    if (startPosition === void 0) {
+      startPosition = this.position + 1;
+    }
+
+    var searchPosition = startPosition;
+
+    while (searchPosition < this.tokens.length) {
+      if (WHITESPACE_EQUIV_TOKENS[this.tokens[searchPosition][_tokenize.FIELDS.TYPE]]) {
+        searchPosition++;
+        continue;
+      } else {
+        return searchPosition;
+      }
+    }
+
+    return -1;
+  };
+
+  _createClass(Parser, [{
+    key: "currToken",
+    get: function get() {
+      return this.tokens[this.position];
+    }
+  }, {
+    key: "nextToken",
+    get: function get() {
+      return this.tokens[this.position + 1];
+    }
+  }, {
+    key: "prevToken",
+    get: function get() {
+      return this.tokens[this.position - 1];
+    }
+  }]);
+
+  return Parser;
+}();
+
+exports["default"] = Parser;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/processor.js b/node_modules/postcss-selector-parser/dist/processor.js
new file mode 100644
index 000000000..a00170c28
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/processor.js
@@ -0,0 +1,206 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _parser = _interopRequireDefault(require("./parser"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+var Processor = /*#__PURE__*/function () {
+  function Processor(func, options) {
+    this.func = func || function noop() {};
+
+    this.funcRes = null;
+    this.options = options;
+  }
+
+  var _proto = Processor.prototype;
+
+  _proto._shouldUpdateSelector = function _shouldUpdateSelector(rule, options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    var merged = Object.assign({}, this.options, options);
+
+    if (merged.updateSelector === false) {
+      return false;
+    } else {
+      return typeof rule !== "string";
+    }
+  };
+
+  _proto._isLossy = function _isLossy(options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    var merged = Object.assign({}, this.options, options);
+
+    if (merged.lossless === false) {
+      return true;
+    } else {
+      return false;
+    }
+  };
+
+  _proto._root = function _root(rule, options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    var parser = new _parser["default"](rule, this._parseOptions(options));
+    return parser.root;
+  };
+
+  _proto._parseOptions = function _parseOptions(options) {
+    return {
+      lossy: this._isLossy(options)
+    };
+  };
+
+  _proto._run = function _run(rule, options) {
+    var _this = this;
+
+    if (options === void 0) {
+      options = {};
+    }
+
+    return new Promise(function (resolve, reject) {
+      try {
+        var root = _this._root(rule, options);
+
+        Promise.resolve(_this.func(root)).then(function (transform) {
+          var string = undefined;
+
+          if (_this._shouldUpdateSelector(rule, options)) {
+            string = root.toString();
+            rule.selector = string;
+          }
+
+          return {
+            transform: transform,
+            root: root,
+            string: string
+          };
+        }).then(resolve, reject);
+      } catch (e) {
+        reject(e);
+        return;
+      }
+    });
+  };
+
+  _proto._runSync = function _runSync(rule, options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    var root = this._root(rule, options);
+
+    var transform = this.func(root);
+
+    if (transform && typeof transform.then === "function") {
+      throw new Error("Selector processor returned a promise to a synchronous call.");
+    }
+
+    var string = undefined;
+
+    if (options.updateSelector && typeof rule !== "string") {
+      string = root.toString();
+      rule.selector = string;
+    }
+
+    return {
+      transform: transform,
+      root: root,
+      string: string
+    };
+  }
+  /**
+   * Process rule into a selector AST.
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {Promise<parser.Root>} The AST of the selector after processing it.
+   */
+  ;
+
+  _proto.ast = function ast(rule, options) {
+    return this._run(rule, options).then(function (result) {
+      return result.root;
+    });
+  }
+  /**
+   * Process rule into a selector AST synchronously.
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {parser.Root} The AST of the selector after processing it.
+   */
+  ;
+
+  _proto.astSync = function astSync(rule, options) {
+    return this._runSync(rule, options).root;
+  }
+  /**
+   * Process a selector into a transformed value asynchronously
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {Promise<any>} The value returned by the processor.
+   */
+  ;
+
+  _proto.transform = function transform(rule, options) {
+    return this._run(rule, options).then(function (result) {
+      return result.transform;
+    });
+  }
+  /**
+   * Process a selector into a transformed value synchronously.
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {any} The value returned by the processor.
+   */
+  ;
+
+  _proto.transformSync = function transformSync(rule, options) {
+    return this._runSync(rule, options).transform;
+  }
+  /**
+   * Process a selector into a new selector string asynchronously.
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {string} the selector after processing.
+   */
+  ;
+
+  _proto.process = function process(rule, options) {
+    return this._run(rule, options).then(function (result) {
+      return result.string || result.root.toString();
+    });
+  }
+  /**
+   * Process a selector into a new selector string synchronously.
+   *
+   * @param rule {postcss.Rule | string} The css selector to be processed
+   * @param options The options for processing
+   * @returns {string} the selector after processing.
+   */
+  ;
+
+  _proto.processSync = function processSync(rule, options) {
+    var result = this._runSync(rule, options);
+
+    return result.string || result.root.toString();
+  };
+
+  return Processor;
+}();
+
+exports["default"] = Processor;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/attribute.js b/node_modules/postcss-selector-parser/dist/selectors/attribute.js
new file mode 100644
index 000000000..8f535e5d7
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/attribute.js
@@ -0,0 +1,515 @@
+"use strict";
+
+exports.__esModule = true;
+exports.unescapeValue = unescapeValue;
+exports["default"] = void 0;
+
+var _cssesc = _interopRequireDefault(require("cssesc"));
+
+var _unesc = _interopRequireDefault(require("../util/unesc"));
+
+var _namespace = _interopRequireDefault(require("./namespace"));
+
+var _types = require("./types");
+
+var _CSSESC_QUOTE_OPTIONS;
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var deprecate = require("util-deprecate");
+
+var WRAPPED_IN_QUOTES = /^('|")([^]*)\1$/;
+var warnOfDeprecatedValueAssignment = deprecate(function () {}, "Assigning an attribute a value containing characters that might need to be escaped is deprecated. " + "Call attribute.setValue() instead.");
+var warnOfDeprecatedQuotedAssignment = deprecate(function () {}, "Assigning attr.quoted is deprecated and has no effect. Assign to attr.quoteMark instead.");
+var warnOfDeprecatedConstructor = deprecate(function () {}, "Constructing an Attribute selector with a value without specifying quoteMark is deprecated. Note: The value should be unescaped now.");
+
+function unescapeValue(value) {
+  var deprecatedUsage = false;
+  var quoteMark = null;
+  var unescaped = value;
+  var m = unescaped.match(WRAPPED_IN_QUOTES);
+
+  if (m) {
+    quoteMark = m[1];
+    unescaped = m[2];
+  }
+
+  unescaped = (0, _unesc["default"])(unescaped);
+
+  if (unescaped !== value) {
+    deprecatedUsage = true;
+  }
+
+  return {
+    deprecatedUsage: deprecatedUsage,
+    unescaped: unescaped,
+    quoteMark: quoteMark
+  };
+}
+
+function handleDeprecatedContructorOpts(opts) {
+  if (opts.quoteMark !== undefined) {
+    return opts;
+  }
+
+  if (opts.value === undefined) {
+    return opts;
+  }
+
+  warnOfDeprecatedConstructor();
+
+  var _unescapeValue = unescapeValue(opts.value),
+      quoteMark = _unescapeValue.quoteMark,
+      unescaped = _unescapeValue.unescaped;
+
+  if (!opts.raws) {
+    opts.raws = {};
+  }
+
+  if (opts.raws.value === undefined) {
+    opts.raws.value = opts.value;
+  }
+
+  opts.value = unescaped;
+  opts.quoteMark = quoteMark;
+  return opts;
+}
+
+var Attribute = /*#__PURE__*/function (_Namespace) {
+  _inheritsLoose(Attribute, _Namespace);
+
+  function Attribute(opts) {
+    var _this;
+
+    if (opts === void 0) {
+      opts = {};
+    }
+
+    _this = _Namespace.call(this, handleDeprecatedContructorOpts(opts)) || this;
+    _this.type = _types.ATTRIBUTE;
+    _this.raws = _this.raws || {};
+    Object.defineProperty(_this.raws, 'unquoted', {
+      get: deprecate(function () {
+        return _this.value;
+      }, "attr.raws.unquoted is deprecated. Call attr.value instead."),
+      set: deprecate(function () {
+        return _this.value;
+      }, "Setting attr.raws.unquoted is deprecated and has no effect. attr.value is unescaped by default now.")
+    });
+    _this._constructed = true;
+    return _this;
+  }
+  /**
+   * Returns the Attribute's value quoted such that it would be legal to use
+   * in the value of a css file. The original value's quotation setting
+   * used for stringification is left unchanged. See `setValue(value, options)`
+   * if you want to control the quote settings of a new value for the attribute.
+   *
+   * You can also change the quotation used for the current value by setting quoteMark.
+   *
+   * Options:
+   *   * quoteMark {'"' | "'" | null} - Use this value to quote the value. If this
+   *     option is not set, the original value for quoteMark will be used. If
+   *     indeterminate, a double quote is used. The legal values are:
+   *     * `null` - the value will be unquoted and characters will be escaped as necessary.
+   *     * `'` - the value will be quoted with a single quote and single quotes are escaped.
+   *     * `"` - the value will be quoted with a double quote and double quotes are escaped.
+   *   * preferCurrentQuoteMark {boolean} - if true, prefer the source quote mark
+   *     over the quoteMark option value.
+   *   * smart {boolean} - if true, will select a quote mark based on the value
+   *     and the other options specified here. See the `smartQuoteMark()`
+   *     method.
+   **/
+
+
+  var _proto = Attribute.prototype;
+
+  _proto.getQuotedValue = function getQuotedValue(options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    var quoteMark = this._determineQuoteMark(options);
+
+    var cssescopts = CSSESC_QUOTE_OPTIONS[quoteMark];
+    var escaped = (0, _cssesc["default"])(this._value, cssescopts);
+    return escaped;
+  };
+
+  _proto._determineQuoteMark = function _determineQuoteMark(options) {
+    return options.smart ? this.smartQuoteMark(options) : this.preferredQuoteMark(options);
+  }
+  /**
+   * Set the unescaped value with the specified quotation options. The value
+   * provided must not include any wrapping quote marks -- those quotes will
+   * be interpreted as part of the value and escaped accordingly.
+   */
+  ;
+
+  _proto.setValue = function setValue(value, options) {
+    if (options === void 0) {
+      options = {};
+    }
+
+    this._value = value;
+    this._quoteMark = this._determineQuoteMark(options);
+
+    this._syncRawValue();
+  }
+  /**
+   * Intelligently select a quoteMark value based on the value's contents. If
+   * the value is a legal CSS ident, it will not be quoted. Otherwise a quote
+   * mark will be picked that minimizes the number of escapes.
+   *
+   * If there's no clear winner, the quote mark from these options is used,
+   * then the source quote mark (this is inverted if `preferCurrentQuoteMark` is
+   * true). If the quoteMark is unspecified, a double quote is used.
+   *
+   * @param options This takes the quoteMark and preferCurrentQuoteMark options
+   * from the quoteValue method.
+   */
+  ;
+
+  _proto.smartQuoteMark = function smartQuoteMark(options) {
+    var v = this.value;
+    var numSingleQuotes = v.replace(/[^']/g, '').length;
+    var numDoubleQuotes = v.replace(/[^"]/g, '').length;
+
+    if (numSingleQuotes + numDoubleQuotes === 0) {
+      var escaped = (0, _cssesc["default"])(v, {
+        isIdentifier: true
+      });
+
+      if (escaped === v) {
+        return Attribute.NO_QUOTE;
+      } else {
+        var pref = this.preferredQuoteMark(options);
+
+        if (pref === Attribute.NO_QUOTE) {
+          // pick a quote mark that isn't none and see if it's smaller
+          var quote = this.quoteMark || options.quoteMark || Attribute.DOUBLE_QUOTE;
+          var opts = CSSESC_QUOTE_OPTIONS[quote];
+          var quoteValue = (0, _cssesc["default"])(v, opts);
+
+          if (quoteValue.length < escaped.length) {
+            return quote;
+          }
+        }
+
+        return pref;
+      }
+    } else if (numDoubleQuotes === numSingleQuotes) {
+      return this.preferredQuoteMark(options);
+    } else if (numDoubleQuotes < numSingleQuotes) {
+      return Attribute.DOUBLE_QUOTE;
+    } else {
+      return Attribute.SINGLE_QUOTE;
+    }
+  }
+  /**
+   * Selects the preferred quote mark based on the options and the current quote mark value.
+   * If you want the quote mark to depend on the attribute value, call `smartQuoteMark(opts)`
+   * instead.
+   */
+  ;
+
+  _proto.preferredQuoteMark = function preferredQuoteMark(options) {
+    var quoteMark = options.preferCurrentQuoteMark ? this.quoteMark : options.quoteMark;
+
+    if (quoteMark === undefined) {
+      quoteMark = options.preferCurrentQuoteMark ? options.quoteMark : this.quoteMark;
+    }
+
+    if (quoteMark === undefined) {
+      quoteMark = Attribute.DOUBLE_QUOTE;
+    }
+
+    return quoteMark;
+  };
+
+  _proto._syncRawValue = function _syncRawValue() {
+    var rawValue = (0, _cssesc["default"])(this._value, CSSESC_QUOTE_OPTIONS[this.quoteMark]);
+
+    if (rawValue === this._value) {
+      if (this.raws) {
+        delete this.raws.value;
+      }
+    } else {
+      this.raws.value = rawValue;
+    }
+  };
+
+  _proto._handleEscapes = function _handleEscapes(prop, value) {
+    if (this._constructed) {
+      var escaped = (0, _cssesc["default"])(value, {
+        isIdentifier: true
+      });
+
+      if (escaped !== value) {
+        this.raws[prop] = escaped;
+      } else {
+        delete this.raws[prop];
+      }
+    }
+  };
+
+  _proto._spacesFor = function _spacesFor(name) {
+    var attrSpaces = {
+      before: '',
+      after: ''
+    };
+    var spaces = this.spaces[name] || {};
+    var rawSpaces = this.raws.spaces && this.raws.spaces[name] || {};
+    return Object.assign(attrSpaces, spaces, rawSpaces);
+  };
+
+  _proto._stringFor = function _stringFor(name, spaceName, concat) {
+    if (spaceName === void 0) {
+      spaceName = name;
+    }
+
+    if (concat === void 0) {
+      concat = defaultAttrConcat;
+    }
+
+    var attrSpaces = this._spacesFor(spaceName);
+
+    return concat(this.stringifyProperty(name), attrSpaces);
+  }
+  /**
+   * returns the offset of the attribute part specified relative to the
+   * start of the node of the output string.
+   *
+   * * "ns" - alias for "namespace"
+   * * "namespace" - the namespace if it exists.
+   * * "attribute" - the attribute name
+   * * "attributeNS" - the start of the attribute or its namespace
+   * * "operator" - the match operator of the attribute
+   * * "value" - The value (string or identifier)
+   * * "insensitive" - the case insensitivity flag;
+   * @param part One of the possible values inside an attribute.
+   * @returns -1 if the name is invalid or the value doesn't exist in this attribute.
+   */
+  ;
+
+  _proto.offsetOf = function offsetOf(name) {
+    var count = 1;
+
+    var attributeSpaces = this._spacesFor("attribute");
+
+    count += attributeSpaces.before.length;
+
+    if (name === "namespace" || name === "ns") {
+      return this.namespace ? count : -1;
+    }
+
+    if (name === "attributeNS") {
+      return count;
+    }
+
+    count += this.namespaceString.length;
+
+    if (this.namespace) {
+      count += 1;
+    }
+
+    if (name === "attribute") {
+      return count;
+    }
+
+    count += this.stringifyProperty("attribute").length;
+    count += attributeSpaces.after.length;
+
+    var operatorSpaces = this._spacesFor("operator");
+
+    count += operatorSpaces.before.length;
+    var operator = this.stringifyProperty("operator");
+
+    if (name === "operator") {
+      return operator ? count : -1;
+    }
+
+    count += operator.length;
+    count += operatorSpaces.after.length;
+
+    var valueSpaces = this._spacesFor("value");
+
+    count += valueSpaces.before.length;
+    var value = this.stringifyProperty("value");
+
+    if (name === "value") {
+      return value ? count : -1;
+    }
+
+    count += value.length;
+    count += valueSpaces.after.length;
+
+    var insensitiveSpaces = this._spacesFor("insensitive");
+
+    count += insensitiveSpaces.before.length;
+
+    if (name === "insensitive") {
+      return this.insensitive ? count : -1;
+    }
+
+    return -1;
+  };
+
+  _proto.toString = function toString() {
+    var _this2 = this;
+
+    var selector = [this.rawSpaceBefore, '['];
+    selector.push(this._stringFor('qualifiedAttribute', 'attribute'));
+
+    if (this.operator && (this.value || this.value === '')) {
+      selector.push(this._stringFor('operator'));
+      selector.push(this._stringFor('value'));
+      selector.push(this._stringFor('insensitiveFlag', 'insensitive', function (attrValue, attrSpaces) {
+        if (attrValue.length > 0 && !_this2.quoted && attrSpaces.before.length === 0 && !(_this2.spaces.value && _this2.spaces.value.after)) {
+          attrSpaces.before = " ";
+        }
+
+        return defaultAttrConcat(attrValue, attrSpaces);
+      }));
+    }
+
+    selector.push(']');
+    selector.push(this.rawSpaceAfter);
+    return selector.join('');
+  };
+
+  _createClass(Attribute, [{
+    key: "quoted",
+    get: function get() {
+      var qm = this.quoteMark;
+      return qm === "'" || qm === '"';
+    },
+    set: function set(value) {
+      warnOfDeprecatedQuotedAssignment();
+    }
+    /**
+     * returns a single (`'`) or double (`"`) quote character if the value is quoted.
+     * returns `null` if the value is not quoted.
+     * returns `undefined` if the quotation state is unknown (this can happen when
+     * the attribute is constructed without specifying a quote mark.)
+     */
+
+  }, {
+    key: "quoteMark",
+    get: function get() {
+      return this._quoteMark;
+    }
+    /**
+     * Set the quote mark to be used by this attribute's value.
+     * If the quote mark changes, the raw (escaped) value at `attr.raws.value` of the attribute
+     * value is updated accordingly.
+     *
+     * @param {"'" | '"' | null} quoteMark The quote mark or `null` if the value should be unquoted.
+     */
+    ,
+    set: function set(quoteMark) {
+      if (!this._constructed) {
+        this._quoteMark = quoteMark;
+        return;
+      }
+
+      if (this._quoteMark !== quoteMark) {
+        this._quoteMark = quoteMark;
+
+        this._syncRawValue();
+      }
+    }
+  }, {
+    key: "qualifiedAttribute",
+    get: function get() {
+      return this.qualifiedName(this.raws.attribute || this.attribute);
+    }
+  }, {
+    key: "insensitiveFlag",
+    get: function get() {
+      return this.insensitive ? 'i' : '';
+    }
+  }, {
+    key: "value",
+    get: function get() {
+      return this._value;
+    }
+    /**
+     * Before 3.0, the value had to be set to an escaped value including any wrapped
+     * quote marks. In 3.0, the semantics of `Attribute.value` changed so that the value
+     * is unescaped during parsing and any quote marks are removed.
+     *
+     * Because the ambiguity of this semantic change, if you set `attr.value = newValue`,
+     * a deprecation warning is raised when the new value contains any characters that would
+     * require escaping (including if it contains wrapped quotes).
+     *
+     * Instead, you should call `attr.setValue(newValue, opts)` and pass options that describe
+     * how the new value is quoted.
+     */
+    ,
+    set: function set(v) {
+      if (this._constructed) {
+        var _unescapeValue2 = unescapeValue(v),
+            deprecatedUsage = _unescapeValue2.deprecatedUsage,
+            unescaped = _unescapeValue2.unescaped,
+            quoteMark = _unescapeValue2.quoteMark;
+
+        if (deprecatedUsage) {
+          warnOfDeprecatedValueAssignment();
+        }
+
+        if (unescaped === this._value && quoteMark === this._quoteMark) {
+          return;
+        }
+
+        this._value = unescaped;
+        this._quoteMark = quoteMark;
+
+        this._syncRawValue();
+      } else {
+        this._value = v;
+      }
+    }
+  }, {
+    key: "attribute",
+    get: function get() {
+      return this._attribute;
+    },
+    set: function set(name) {
+      this._handleEscapes("attribute", name);
+
+      this._attribute = name;
+    }
+  }]);
+
+  return Attribute;
+}(_namespace["default"]);
+
+exports["default"] = Attribute;
+Attribute.NO_QUOTE = null;
+Attribute.SINGLE_QUOTE = "'";
+Attribute.DOUBLE_QUOTE = '"';
+var CSSESC_QUOTE_OPTIONS = (_CSSESC_QUOTE_OPTIONS = {
+  "'": {
+    quotes: 'single',
+    wrap: true
+  },
+  '"': {
+    quotes: 'double',
+    wrap: true
+  }
+}, _CSSESC_QUOTE_OPTIONS[null] = {
+  isIdentifier: true
+}, _CSSESC_QUOTE_OPTIONS);
+
+function defaultAttrConcat(attrValue, attrSpaces) {
+  return "" + attrSpaces.before + attrValue + attrSpaces.after;
+}
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/className.js b/node_modules/postcss-selector-parser/dist/selectors/className.js
new file mode 100644
index 000000000..22409914c
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/className.js
@@ -0,0 +1,69 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _cssesc = _interopRequireDefault(require("cssesc"));
+
+var _util = require("../util");
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var ClassName = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(ClassName, _Node);
+
+  function ClassName(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.CLASS;
+    _this._constructed = true;
+    return _this;
+  }
+
+  var _proto = ClassName.prototype;
+
+  _proto.valueToString = function valueToString() {
+    return '.' + _Node.prototype.valueToString.call(this);
+  };
+
+  _createClass(ClassName, [{
+    key: "value",
+    get: function get() {
+      return this._value;
+    },
+    set: function set(v) {
+      if (this._constructed) {
+        var escaped = (0, _cssesc["default"])(v, {
+          isIdentifier: true
+        });
+
+        if (escaped !== v) {
+          (0, _util.ensureObject)(this, "raws");
+          this.raws.value = escaped;
+        } else if (this.raws) {
+          delete this.raws.value;
+        }
+      }
+
+      this._value = v;
+    }
+  }]);
+
+  return ClassName;
+}(_node["default"]);
+
+exports["default"] = ClassName;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/combinator.js b/node_modules/postcss-selector-parser/dist/selectors/combinator.js
new file mode 100644
index 000000000..271ab4d3b
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/combinator.js
@@ -0,0 +1,31 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Combinator = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Combinator, _Node);
+
+  function Combinator(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.COMBINATOR;
+    return _this;
+  }
+
+  return Combinator;
+}(_node["default"]);
+
+exports["default"] = Combinator;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/comment.js b/node_modules/postcss-selector-parser/dist/selectors/comment.js
new file mode 100644
index 000000000..e778094e1
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/comment.js
@@ -0,0 +1,31 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Comment = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Comment, _Node);
+
+  function Comment(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.COMMENT;
+    return _this;
+  }
+
+  return Comment;
+}(_node["default"]);
+
+exports["default"] = Comment;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/constructors.js b/node_modules/postcss-selector-parser/dist/selectors/constructors.js
new file mode 100644
index 000000000..078023eb2
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/constructors.js
@@ -0,0 +1,102 @@
+"use strict";
+
+exports.__esModule = true;
+exports.universal = exports.tag = exports.string = exports.selector = exports.root = exports.pseudo = exports.nesting = exports.id = exports.comment = exports.combinator = exports.className = exports.attribute = void 0;
+
+var _attribute = _interopRequireDefault(require("./attribute"));
+
+var _className = _interopRequireDefault(require("./className"));
+
+var _combinator = _interopRequireDefault(require("./combinator"));
+
+var _comment = _interopRequireDefault(require("./comment"));
+
+var _id = _interopRequireDefault(require("./id"));
+
+var _nesting = _interopRequireDefault(require("./nesting"));
+
+var _pseudo = _interopRequireDefault(require("./pseudo"));
+
+var _root = _interopRequireDefault(require("./root"));
+
+var _selector = _interopRequireDefault(require("./selector"));
+
+var _string = _interopRequireDefault(require("./string"));
+
+var _tag = _interopRequireDefault(require("./tag"));
+
+var _universal = _interopRequireDefault(require("./universal"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+var attribute = function attribute(opts) {
+  return new _attribute["default"](opts);
+};
+
+exports.attribute = attribute;
+
+var className = function className(opts) {
+  return new _className["default"](opts);
+};
+
+exports.className = className;
+
+var combinator = function combinator(opts) {
+  return new _combinator["default"](opts);
+};
+
+exports.combinator = combinator;
+
+var comment = function comment(opts) {
+  return new _comment["default"](opts);
+};
+
+exports.comment = comment;
+
+var id = function id(opts) {
+  return new _id["default"](opts);
+};
+
+exports.id = id;
+
+var nesting = function nesting(opts) {
+  return new _nesting["default"](opts);
+};
+
+exports.nesting = nesting;
+
+var pseudo = function pseudo(opts) {
+  return new _pseudo["default"](opts);
+};
+
+exports.pseudo = pseudo;
+
+var root = function root(opts) {
+  return new _root["default"](opts);
+};
+
+exports.root = root;
+
+var selector = function selector(opts) {
+  return new _selector["default"](opts);
+};
+
+exports.selector = selector;
+
+var string = function string(opts) {
+  return new _string["default"](opts);
+};
+
+exports.string = string;
+
+var tag = function tag(opts) {
+  return new _tag["default"](opts);
+};
+
+exports.tag = tag;
+
+var universal = function universal(opts) {
+  return new _universal["default"](opts);
+};
+
+exports.universal = universal;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/container.js b/node_modules/postcss-selector-parser/dist/selectors/container.js
new file mode 100644
index 000000000..2626fb85b
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/container.js
@@ -0,0 +1,395 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var types = _interopRequireWildcard(require("./types"));
+
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = o[Symbol.iterator](); return it.next.bind(it); }
+
+function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
+
+function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Container = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Container, _Node);
+
+  function Container(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+
+    if (!_this.nodes) {
+      _this.nodes = [];
+    }
+
+    return _this;
+  }
+
+  var _proto = Container.prototype;
+
+  _proto.append = function append(selector) {
+    selector.parent = this;
+    this.nodes.push(selector);
+    return this;
+  };
+
+  _proto.prepend = function prepend(selector) {
+    selector.parent = this;
+    this.nodes.unshift(selector);
+    return this;
+  };
+
+  _proto.at = function at(index) {
+    return this.nodes[index];
+  };
+
+  _proto.index = function index(child) {
+    if (typeof child === 'number') {
+      return child;
+    }
+
+    return this.nodes.indexOf(child);
+  };
+
+  _proto.removeChild = function removeChild(child) {
+    child = this.index(child);
+    this.at(child).parent = undefined;
+    this.nodes.splice(child, 1);
+    var index;
+
+    for (var id in this.indexes) {
+      index = this.indexes[id];
+
+      if (index >= child) {
+        this.indexes[id] = index - 1;
+      }
+    }
+
+    return this;
+  };
+
+  _proto.removeAll = function removeAll() {
+    for (var _iterator = _createForOfIteratorHelperLoose(this.nodes), _step; !(_step = _iterator()).done;) {
+      var node = _step.value;
+      node.parent = undefined;
+    }
+
+    this.nodes = [];
+    return this;
+  };
+
+  _proto.empty = function empty() {
+    return this.removeAll();
+  };
+
+  _proto.insertAfter = function insertAfter(oldNode, newNode) {
+    newNode.parent = this;
+    var oldIndex = this.index(oldNode);
+    this.nodes.splice(oldIndex + 1, 0, newNode);
+    newNode.parent = this;
+    var index;
+
+    for (var id in this.indexes) {
+      index = this.indexes[id];
+
+      if (oldIndex <= index) {
+        this.indexes[id] = index + 1;
+      }
+    }
+
+    return this;
+  };
+
+  _proto.insertBefore = function insertBefore(oldNode, newNode) {
+    newNode.parent = this;
+    var oldIndex = this.index(oldNode);
+    this.nodes.splice(oldIndex, 0, newNode);
+    newNode.parent = this;
+    var index;
+
+    for (var id in this.indexes) {
+      index = this.indexes[id];
+
+      if (index <= oldIndex) {
+        this.indexes[id] = index + 1;
+      }
+    }
+
+    return this;
+  };
+
+  _proto._findChildAtPosition = function _findChildAtPosition(line, col) {
+    var found = undefined;
+    this.each(function (node) {
+      if (node.atPosition) {
+        var foundChild = node.atPosition(line, col);
+
+        if (foundChild) {
+          found = foundChild;
+          return false;
+        }
+      } else if (node.isAtPosition(line, col)) {
+        found = node;
+        return false;
+      }
+    });
+    return found;
+  }
+  /**
+   * Return the most specific node at the line and column number given.
+   * The source location is based on the original parsed location, locations aren't
+   * updated as selector nodes are mutated.
+   * 
+   * Note that this location is relative to the location of the first character
+   * of the selector, and not the location of the selector in the overall document
+   * when used in conjunction with postcss.
+   *
+   * If not found, returns undefined.
+   * @param {number} line The line number of the node to find. (1-based index)
+   * @param {number} col  The column number of the node to find. (1-based index)
+   */
+  ;
+
+  _proto.atPosition = function atPosition(line, col) {
+    if (this.isAtPosition(line, col)) {
+      return this._findChildAtPosition(line, col) || this;
+    } else {
+      return undefined;
+    }
+  };
+
+  _proto._inferEndPosition = function _inferEndPosition() {
+    if (this.last && this.last.source && this.last.source.end) {
+      this.source = this.source || {};
+      this.source.end = this.source.end || {};
+      Object.assign(this.source.end, this.last.source.end);
+    }
+  };
+
+  _proto.each = function each(callback) {
+    if (!this.lastEach) {
+      this.lastEach = 0;
+    }
+
+    if (!this.indexes) {
+      this.indexes = {};
+    }
+
+    this.lastEach++;
+    var id = this.lastEach;
+    this.indexes[id] = 0;
+
+    if (!this.length) {
+      return undefined;
+    }
+
+    var index, result;
+
+    while (this.indexes[id] < this.length) {
+      index = this.indexes[id];
+      result = callback(this.at(index), index);
+
+      if (result === false) {
+        break;
+      }
+
+      this.indexes[id] += 1;
+    }
+
+    delete this.indexes[id];
+
+    if (result === false) {
+      return false;
+    }
+  };
+
+  _proto.walk = function walk(callback) {
+    return this.each(function (node, i) {
+      var result = callback(node, i);
+
+      if (result !== false && node.length) {
+        result = node.walk(callback);
+      }
+
+      if (result === false) {
+        return false;
+      }
+    });
+  };
+
+  _proto.walkAttributes = function walkAttributes(callback) {
+    var _this2 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.ATTRIBUTE) {
+        return callback.call(_this2, selector);
+      }
+    });
+  };
+
+  _proto.walkClasses = function walkClasses(callback) {
+    var _this3 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.CLASS) {
+        return callback.call(_this3, selector);
+      }
+    });
+  };
+
+  _proto.walkCombinators = function walkCombinators(callback) {
+    var _this4 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.COMBINATOR) {
+        return callback.call(_this4, selector);
+      }
+    });
+  };
+
+  _proto.walkComments = function walkComments(callback) {
+    var _this5 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.COMMENT) {
+        return callback.call(_this5, selector);
+      }
+    });
+  };
+
+  _proto.walkIds = function walkIds(callback) {
+    var _this6 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.ID) {
+        return callback.call(_this6, selector);
+      }
+    });
+  };
+
+  _proto.walkNesting = function walkNesting(callback) {
+    var _this7 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.NESTING) {
+        return callback.call(_this7, selector);
+      }
+    });
+  };
+
+  _proto.walkPseudos = function walkPseudos(callback) {
+    var _this8 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.PSEUDO) {
+        return callback.call(_this8, selector);
+      }
+    });
+  };
+
+  _proto.walkTags = function walkTags(callback) {
+    var _this9 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.TAG) {
+        return callback.call(_this9, selector);
+      }
+    });
+  };
+
+  _proto.walkUniversals = function walkUniversals(callback) {
+    var _this10 = this;
+
+    return this.walk(function (selector) {
+      if (selector.type === types.UNIVERSAL) {
+        return callback.call(_this10, selector);
+      }
+    });
+  };
+
+  _proto.split = function split(callback) {
+    var _this11 = this;
+
+    var current = [];
+    return this.reduce(function (memo, node, index) {
+      var split = callback.call(_this11, node);
+      current.push(node);
+
+      if (split) {
+        memo.push(current);
+        current = [];
+      } else if (index === _this11.length - 1) {
+        memo.push(current);
+      }
+
+      return memo;
+    }, []);
+  };
+
+  _proto.map = function map(callback) {
+    return this.nodes.map(callback);
+  };
+
+  _proto.reduce = function reduce(callback, memo) {
+    return this.nodes.reduce(callback, memo);
+  };
+
+  _proto.every = function every(callback) {
+    return this.nodes.every(callback);
+  };
+
+  _proto.some = function some(callback) {
+    return this.nodes.some(callback);
+  };
+
+  _proto.filter = function filter(callback) {
+    return this.nodes.filter(callback);
+  };
+
+  _proto.sort = function sort(callback) {
+    return this.nodes.sort(callback);
+  };
+
+  _proto.toString = function toString() {
+    return this.map(String).join('');
+  };
+
+  _createClass(Container, [{
+    key: "first",
+    get: function get() {
+      return this.at(0);
+    }
+  }, {
+    key: "last",
+    get: function get() {
+      return this.at(this.length - 1);
+    }
+  }, {
+    key: "length",
+    get: function get() {
+      return this.nodes.length;
+    }
+  }]);
+
+  return Container;
+}(_node["default"]);
+
+exports["default"] = Container;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/guards.js b/node_modules/postcss-selector-parser/dist/selectors/guards.js
new file mode 100644
index 000000000..c949af57e
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/guards.js
@@ -0,0 +1,64 @@
+"use strict";
+
+exports.__esModule = true;
+exports.isNode = isNode;
+exports.isPseudoElement = isPseudoElement;
+exports.isPseudoClass = isPseudoClass;
+exports.isContainer = isContainer;
+exports.isNamespace = isNamespace;
+exports.isUniversal = exports.isTag = exports.isString = exports.isSelector = exports.isRoot = exports.isPseudo = exports.isNesting = exports.isIdentifier = exports.isComment = exports.isCombinator = exports.isClassName = exports.isAttribute = void 0;
+
+var _types = require("./types");
+
+var _IS_TYPE;
+
+var IS_TYPE = (_IS_TYPE = {}, _IS_TYPE[_types.ATTRIBUTE] = true, _IS_TYPE[_types.CLASS] = true, _IS_TYPE[_types.COMBINATOR] = true, _IS_TYPE[_types.COMMENT] = true, _IS_TYPE[_types.ID] = true, _IS_TYPE[_types.NESTING] = true, _IS_TYPE[_types.PSEUDO] = true, _IS_TYPE[_types.ROOT] = true, _IS_TYPE[_types.SELECTOR] = true, _IS_TYPE[_types.STRING] = true, _IS_TYPE[_types.TAG] = true, _IS_TYPE[_types.UNIVERSAL] = true, _IS_TYPE);
+
+function isNode(node) {
+  return typeof node === "object" && IS_TYPE[node.type];
+}
+
+function isNodeType(type, node) {
+  return isNode(node) && node.type === type;
+}
+
+var isAttribute = isNodeType.bind(null, _types.ATTRIBUTE);
+exports.isAttribute = isAttribute;
+var isClassName = isNodeType.bind(null, _types.CLASS);
+exports.isClassName = isClassName;
+var isCombinator = isNodeType.bind(null, _types.COMBINATOR);
+exports.isCombinator = isCombinator;
+var isComment = isNodeType.bind(null, _types.COMMENT);
+exports.isComment = isComment;
+var isIdentifier = isNodeType.bind(null, _types.ID);
+exports.isIdentifier = isIdentifier;
+var isNesting = isNodeType.bind(null, _types.NESTING);
+exports.isNesting = isNesting;
+var isPseudo = isNodeType.bind(null, _types.PSEUDO);
+exports.isPseudo = isPseudo;
+var isRoot = isNodeType.bind(null, _types.ROOT);
+exports.isRoot = isRoot;
+var isSelector = isNodeType.bind(null, _types.SELECTOR);
+exports.isSelector = isSelector;
+var isString = isNodeType.bind(null, _types.STRING);
+exports.isString = isString;
+var isTag = isNodeType.bind(null, _types.TAG);
+exports.isTag = isTag;
+var isUniversal = isNodeType.bind(null, _types.UNIVERSAL);
+exports.isUniversal = isUniversal;
+
+function isPseudoElement(node) {
+  return isPseudo(node) && node.value && (node.value.startsWith("::") || node.value.toLowerCase() === ":before" || node.value.toLowerCase() === ":after" || node.value.toLowerCase() === ":first-letter" || node.value.toLowerCase() === ":first-line");
+}
+
+function isPseudoClass(node) {
+  return isPseudo(node) && !isPseudoElement(node);
+}
+
+function isContainer(node) {
+  return !!(isNode(node) && node.walk);
+}
+
+function isNamespace(node) {
+  return isAttribute(node) || isTag(node);
+}
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/id.js b/node_modules/postcss-selector-parser/dist/selectors/id.js
new file mode 100644
index 000000000..4e83147e3
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/id.js
@@ -0,0 +1,37 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var ID = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(ID, _Node);
+
+  function ID(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.ID;
+    return _this;
+  }
+
+  var _proto = ID.prototype;
+
+  _proto.valueToString = function valueToString() {
+    return '#' + _Node.prototype.valueToString.call(this);
+  };
+
+  return ID;
+}(_node["default"]);
+
+exports["default"] = ID;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/index.js b/node_modules/postcss-selector-parser/dist/selectors/index.js
new file mode 100644
index 000000000..1fe9b138a
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/index.js
@@ -0,0 +1,27 @@
+"use strict";
+
+exports.__esModule = true;
+
+var _types = require("./types");
+
+Object.keys(_types).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _types[key]) return;
+  exports[key] = _types[key];
+});
+
+var _constructors = require("./constructors");
+
+Object.keys(_constructors).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _constructors[key]) return;
+  exports[key] = _constructors[key];
+});
+
+var _guards = require("./guards");
+
+Object.keys(_guards).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  if (key in exports && exports[key] === _guards[key]) return;
+  exports[key] = _guards[key];
+});
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/namespace.js b/node_modules/postcss-selector-parser/dist/selectors/namespace.js
new file mode 100644
index 000000000..fd6c729e1
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/namespace.js
@@ -0,0 +1,101 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _cssesc = _interopRequireDefault(require("cssesc"));
+
+var _util = require("../util");
+
+var _node = _interopRequireDefault(require("./node"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Namespace = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Namespace, _Node);
+
+  function Namespace() {
+    return _Node.apply(this, arguments) || this;
+  }
+
+  var _proto = Namespace.prototype;
+
+  _proto.qualifiedName = function qualifiedName(value) {
+    if (this.namespace) {
+      return this.namespaceString + "|" + value;
+    } else {
+      return value;
+    }
+  };
+
+  _proto.valueToString = function valueToString() {
+    return this.qualifiedName(_Node.prototype.valueToString.call(this));
+  };
+
+  _createClass(Namespace, [{
+    key: "namespace",
+    get: function get() {
+      return this._namespace;
+    },
+    set: function set(namespace) {
+      if (namespace === true || namespace === "*" || namespace === "&") {
+        this._namespace = namespace;
+
+        if (this.raws) {
+          delete this.raws.namespace;
+        }
+
+        return;
+      }
+
+      var escaped = (0, _cssesc["default"])(namespace, {
+        isIdentifier: true
+      });
+      this._namespace = namespace;
+
+      if (escaped !== namespace) {
+        (0, _util.ensureObject)(this, "raws");
+        this.raws.namespace = escaped;
+      } else if (this.raws) {
+        delete this.raws.namespace;
+      }
+    }
+  }, {
+    key: "ns",
+    get: function get() {
+      return this._namespace;
+    },
+    set: function set(namespace) {
+      this.namespace = namespace;
+    }
+  }, {
+    key: "namespaceString",
+    get: function get() {
+      if (this.namespace) {
+        var ns = this.stringifyProperty("namespace");
+
+        if (ns === true) {
+          return '';
+        } else {
+          return ns;
+        }
+      } else {
+        return '';
+      }
+    }
+  }]);
+
+  return Namespace;
+}(_node["default"]);
+
+exports["default"] = Namespace;
+;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/nesting.js b/node_modules/postcss-selector-parser/dist/selectors/nesting.js
new file mode 100644
index 000000000..3288c78f2
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/nesting.js
@@ -0,0 +1,32 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Nesting = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(Nesting, _Node);
+
+  function Nesting(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.NESTING;
+    _this.value = '&';
+    return _this;
+  }
+
+  return Nesting;
+}(_node["default"]);
+
+exports["default"] = Nesting;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/node.js b/node_modules/postcss-selector-parser/dist/selectors/node.js
new file mode 100644
index 000000000..e8eca11c7
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/node.js
@@ -0,0 +1,239 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _util = require("../util");
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+var cloneNode = function cloneNode(obj, parent) {
+  if (typeof obj !== 'object' || obj === null) {
+    return obj;
+  }
+
+  var cloned = new obj.constructor();
+
+  for (var i in obj) {
+    if (!obj.hasOwnProperty(i)) {
+      continue;
+    }
+
+    var value = obj[i];
+    var type = typeof value;
+
+    if (i === 'parent' && type === 'object') {
+      if (parent) {
+        cloned[i] = parent;
+      }
+    } else if (value instanceof Array) {
+      cloned[i] = value.map(function (j) {
+        return cloneNode(j, cloned);
+      });
+    } else {
+      cloned[i] = cloneNode(value, cloned);
+    }
+  }
+
+  return cloned;
+};
+
+var Node = /*#__PURE__*/function () {
+  function Node(opts) {
+    if (opts === void 0) {
+      opts = {};
+    }
+
+    Object.assign(this, opts);
+    this.spaces = this.spaces || {};
+    this.spaces.before = this.spaces.before || '';
+    this.spaces.after = this.spaces.after || '';
+  }
+
+  var _proto = Node.prototype;
+
+  _proto.remove = function remove() {
+    if (this.parent) {
+      this.parent.removeChild(this);
+    }
+
+    this.parent = undefined;
+    return this;
+  };
+
+  _proto.replaceWith = function replaceWith() {
+    if (this.parent) {
+      for (var index in arguments) {
+        this.parent.insertBefore(this, arguments[index]);
+      }
+
+      this.remove();
+    }
+
+    return this;
+  };
+
+  _proto.next = function next() {
+    return this.parent.at(this.parent.index(this) + 1);
+  };
+
+  _proto.prev = function prev() {
+    return this.parent.at(this.parent.index(this) - 1);
+  };
+
+  _proto.clone = function clone(overrides) {
+    if (overrides === void 0) {
+      overrides = {};
+    }
+
+    var cloned = cloneNode(this);
+
+    for (var name in overrides) {
+      cloned[name] = overrides[name];
+    }
+
+    return cloned;
+  }
+  /**
+   * Some non-standard syntax doesn't follow normal escaping rules for css.
+   * This allows non standard syntax to be appended to an existing property
+   * by specifying the escaped value. By specifying the escaped value,
+   * illegal characters are allowed to be directly inserted into css output.
+   * @param {string} name the property to set
+   * @param {any} value the unescaped value of the property
+   * @param {string} valueEscaped optional. the escaped value of the property.
+   */
+  ;
+
+  _proto.appendToPropertyAndEscape = function appendToPropertyAndEscape(name, value, valueEscaped) {
+    if (!this.raws) {
+      this.raws = {};
+    }
+
+    var originalValue = this[name];
+    var originalEscaped = this.raws[name];
+    this[name] = originalValue + value; // this may trigger a setter that updates raws, so it has to be set first.
+
+    if (originalEscaped || valueEscaped !== value) {
+      this.raws[name] = (originalEscaped || originalValue) + valueEscaped;
+    } else {
+      delete this.raws[name]; // delete any escaped value that was created by the setter.
+    }
+  }
+  /**
+   * Some non-standard syntax doesn't follow normal escaping rules for css.
+   * This allows the escaped value to be specified directly, allowing illegal
+   * characters to be directly inserted into css output.
+   * @param {string} name the property to set
+   * @param {any} value the unescaped value of the property
+   * @param {string} valueEscaped the escaped value of the property.
+   */
+  ;
+
+  _proto.setPropertyAndEscape = function setPropertyAndEscape(name, value, valueEscaped) {
+    if (!this.raws) {
+      this.raws = {};
+    }
+
+    this[name] = value; // this may trigger a setter that updates raws, so it has to be set first.
+
+    this.raws[name] = valueEscaped;
+  }
+  /**
+   * When you want a value to passed through to CSS directly. This method
+   * deletes the corresponding raw value causing the stringifier to fallback
+   * to the unescaped value.
+   * @param {string} name the property to set.
+   * @param {any} value The value that is both escaped and unescaped.
+   */
+  ;
+
+  _proto.setPropertyWithoutEscape = function setPropertyWithoutEscape(name, value) {
+    this[name] = value; // this may trigger a setter that updates raws, so it has to be set first.
+
+    if (this.raws) {
+      delete this.raws[name];
+    }
+  }
+  /**
+   *
+   * @param {number} line The number (starting with 1)
+   * @param {number} column The column number (starting with 1)
+   */
+  ;
+
+  _proto.isAtPosition = function isAtPosition(line, column) {
+    if (this.source && this.source.start && this.source.end) {
+      if (this.source.start.line > line) {
+        return false;
+      }
+
+      if (this.source.end.line < line) {
+        return false;
+      }
+
+      if (this.source.start.line === line && this.source.start.column > column) {
+        return false;
+      }
+
+      if (this.source.end.line === line && this.source.end.column < column) {
+        return false;
+      }
+
+      return true;
+    }
+
+    return undefined;
+  };
+
+  _proto.stringifyProperty = function stringifyProperty(name) {
+    return this.raws && this.raws[name] || this[name];
+  };
+
+  _proto.valueToString = function valueToString() {
+    return String(this.stringifyProperty("value"));
+  };
+
+  _proto.toString = function toString() {
+    return [this.rawSpaceBefore, this.valueToString(), this.rawSpaceAfter].join('');
+  };
+
+  _createClass(Node, [{
+    key: "rawSpaceBefore",
+    get: function get() {
+      var rawSpace = this.raws && this.raws.spaces && this.raws.spaces.before;
+
+      if (rawSpace === undefined) {
+        rawSpace = this.spaces && this.spaces.before;
+      }
+
+      return rawSpace || "";
+    },
+    set: function set(raw) {
+      (0, _util.ensureObject)(this, "raws", "spaces");
+      this.raws.spaces.before = raw;
+    }
+  }, {
+    key: "rawSpaceAfter",
+    get: function get() {
+      var rawSpace = this.raws && this.raws.spaces && this.raws.spaces.after;
+
+      if (rawSpace === undefined) {
+        rawSpace = this.spaces.after;
+      }
+
+      return rawSpace || "";
+    },
+    set: function set(raw) {
+      (0, _util.ensureObject)(this, "raws", "spaces");
+      this.raws.spaces.after = raw;
+    }
+  }]);
+
+  return Node;
+}();
+
+exports["default"] = Node;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/pseudo.js b/node_modules/postcss-selector-parser/dist/selectors/pseudo.js
new file mode 100644
index 000000000..a0e7bca17
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/pseudo.js
@@ -0,0 +1,38 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _container = _interopRequireDefault(require("./container"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Pseudo = /*#__PURE__*/function (_Container) {
+  _inheritsLoose(Pseudo, _Container);
+
+  function Pseudo(opts) {
+    var _this;
+
+    _this = _Container.call(this, opts) || this;
+    _this.type = _types.PSEUDO;
+    return _this;
+  }
+
+  var _proto = Pseudo.prototype;
+
+  _proto.toString = function toString() {
+    var params = this.length ? '(' + this.map(String).join(',') + ')' : '';
+    return [this.rawSpaceBefore, this.stringifyProperty("value"), params, this.rawSpaceAfter].join('');
+  };
+
+  return Pseudo;
+}(_container["default"]);
+
+exports["default"] = Pseudo;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/root.js b/node_modules/postcss-selector-parser/dist/selectors/root.js
new file mode 100644
index 000000000..be5c2ccb2
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/root.js
@@ -0,0 +1,60 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _container = _interopRequireDefault(require("./container"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Root = /*#__PURE__*/function (_Container) {
+  _inheritsLoose(Root, _Container);
+
+  function Root(opts) {
+    var _this;
+
+    _this = _Container.call(this, opts) || this;
+    _this.type = _types.ROOT;
+    return _this;
+  }
+
+  var _proto = Root.prototype;
+
+  _proto.toString = function toString() {
+    var str = this.reduce(function (memo, selector) {
+      memo.push(String(selector));
+      return memo;
+    }, []).join(',');
+    return this.trailingComma ? str + ',' : str;
+  };
+
+  _proto.error = function error(message, options) {
+    if (this._error) {
+      return this._error(message, options);
+    } else {
+      return new Error(message);
+    }
+  };
+
+  _createClass(Root, [{
+    key: "errorGenerator",
+    set: function set(handler) {
+      this._error = handler;
+    }
+  }]);
+
+  return Root;
+}(_container["default"]);
+
+exports["default"] = Root;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/selector.js b/node_modules/postcss-selector-parser/dist/selectors/selector.js
new file mode 100644
index 000000000..699eeb6e5
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/selector.js
@@ -0,0 +1,31 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _container = _interopRequireDefault(require("./container"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Selector = /*#__PURE__*/function (_Container) {
+  _inheritsLoose(Selector, _Container);
+
+  function Selector(opts) {
+    var _this;
+
+    _this = _Container.call(this, opts) || this;
+    _this.type = _types.SELECTOR;
+    return _this;
+  }
+
+  return Selector;
+}(_container["default"]);
+
+exports["default"] = Selector;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/string.js b/node_modules/postcss-selector-parser/dist/selectors/string.js
new file mode 100644
index 000000000..e61df30c7
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/string.js
@@ -0,0 +1,31 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _node = _interopRequireDefault(require("./node"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var String = /*#__PURE__*/function (_Node) {
+  _inheritsLoose(String, _Node);
+
+  function String(opts) {
+    var _this;
+
+    _this = _Node.call(this, opts) || this;
+    _this.type = _types.STRING;
+    return _this;
+  }
+
+  return String;
+}(_node["default"]);
+
+exports["default"] = String;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/tag.js b/node_modules/postcss-selector-parser/dist/selectors/tag.js
new file mode 100644
index 000000000..e298db15f
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/tag.js
@@ -0,0 +1,31 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _namespace = _interopRequireDefault(require("./namespace"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Tag = /*#__PURE__*/function (_Namespace) {
+  _inheritsLoose(Tag, _Namespace);
+
+  function Tag(opts) {
+    var _this;
+
+    _this = _Namespace.call(this, opts) || this;
+    _this.type = _types.TAG;
+    return _this;
+  }
+
+  return Tag;
+}(_namespace["default"]);
+
+exports["default"] = Tag;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/types.js b/node_modules/postcss-selector-parser/dist/selectors/types.js
new file mode 100644
index 000000000..ab897b8ce
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/types.js
@@ -0,0 +1,28 @@
+"use strict";
+
+exports.__esModule = true;
+exports.UNIVERSAL = exports.ATTRIBUTE = exports.CLASS = exports.COMBINATOR = exports.COMMENT = exports.ID = exports.NESTING = exports.PSEUDO = exports.ROOT = exports.SELECTOR = exports.STRING = exports.TAG = void 0;
+var TAG = 'tag';
+exports.TAG = TAG;
+var STRING = 'string';
+exports.STRING = STRING;
+var SELECTOR = 'selector';
+exports.SELECTOR = SELECTOR;
+var ROOT = 'root';
+exports.ROOT = ROOT;
+var PSEUDO = 'pseudo';
+exports.PSEUDO = PSEUDO;
+var NESTING = 'nesting';
+exports.NESTING = NESTING;
+var ID = 'id';
+exports.ID = ID;
+var COMMENT = 'comment';
+exports.COMMENT = COMMENT;
+var COMBINATOR = 'combinator';
+exports.COMBINATOR = COMBINATOR;
+var CLASS = 'class';
+exports.CLASS = CLASS;
+var ATTRIBUTE = 'attribute';
+exports.ATTRIBUTE = ATTRIBUTE;
+var UNIVERSAL = 'universal';
+exports.UNIVERSAL = UNIVERSAL;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/selectors/universal.js b/node_modules/postcss-selector-parser/dist/selectors/universal.js
new file mode 100644
index 000000000..cf25473d1
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/selectors/universal.js
@@ -0,0 +1,32 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = void 0;
+
+var _namespace = _interopRequireDefault(require("./namespace"));
+
+var _types = require("./types");
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; _setPrototypeOf(subClass, superClass); }
+
+function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
+
+var Universal = /*#__PURE__*/function (_Namespace) {
+  _inheritsLoose(Universal, _Namespace);
+
+  function Universal(opts) {
+    var _this;
+
+    _this = _Namespace.call(this, opts) || this;
+    _this.type = _types.UNIVERSAL;
+    _this.value = '*';
+    return _this;
+  }
+
+  return Universal;
+}(_namespace["default"]);
+
+exports["default"] = Universal;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/sortAscending.js b/node_modules/postcss-selector-parser/dist/sortAscending.js
new file mode 100644
index 000000000..3ef56acc5
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/sortAscending.js
@@ -0,0 +1,13 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = sortAscending;
+
+function sortAscending(list) {
+  return list.sort(function (a, b) {
+    return a - b;
+  });
+}
+
+;
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/tokenTypes.js b/node_modules/postcss-selector-parser/dist/tokenTypes.js
new file mode 100644
index 000000000..48314b93e
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/tokenTypes.js
@@ -0,0 +1,95 @@
+"use strict";
+
+exports.__esModule = true;
+exports.combinator = exports.word = exports.comment = exports.str = exports.tab = exports.newline = exports.feed = exports.cr = exports.backslash = exports.bang = exports.slash = exports.doubleQuote = exports.singleQuote = exports.space = exports.greaterThan = exports.pipe = exports.equals = exports.plus = exports.caret = exports.tilde = exports.dollar = exports.closeSquare = exports.openSquare = exports.closeParenthesis = exports.openParenthesis = exports.semicolon = exports.colon = exports.comma = exports.at = exports.asterisk = exports.ampersand = void 0;
+var ampersand = 38; // `&`.charCodeAt(0);
+
+exports.ampersand = ampersand;
+var asterisk = 42; // `*`.charCodeAt(0);
+
+exports.asterisk = asterisk;
+var at = 64; // `@`.charCodeAt(0);
+
+exports.at = at;
+var comma = 44; // `,`.charCodeAt(0);
+
+exports.comma = comma;
+var colon = 58; // `:`.charCodeAt(0);
+
+exports.colon = colon;
+var semicolon = 59; // `;`.charCodeAt(0);
+
+exports.semicolon = semicolon;
+var openParenthesis = 40; // `(`.charCodeAt(0);
+
+exports.openParenthesis = openParenthesis;
+var closeParenthesis = 41; // `)`.charCodeAt(0);
+
+exports.closeParenthesis = closeParenthesis;
+var openSquare = 91; // `[`.charCodeAt(0);
+
+exports.openSquare = openSquare;
+var closeSquare = 93; // `]`.charCodeAt(0);
+
+exports.closeSquare = closeSquare;
+var dollar = 36; // `$`.charCodeAt(0);
+
+exports.dollar = dollar;
+var tilde = 126; // `~`.charCodeAt(0);
+
+exports.tilde = tilde;
+var caret = 94; // `^`.charCodeAt(0);
+
+exports.caret = caret;
+var plus = 43; // `+`.charCodeAt(0);
+
+exports.plus = plus;
+var equals = 61; // `=`.charCodeAt(0);
+
+exports.equals = equals;
+var pipe = 124; // `|`.charCodeAt(0);
+
+exports.pipe = pipe;
+var greaterThan = 62; // `>`.charCodeAt(0);
+
+exports.greaterThan = greaterThan;
+var space = 32; // ` `.charCodeAt(0);
+
+exports.space = space;
+var singleQuote = 39; // `'`.charCodeAt(0);
+
+exports.singleQuote = singleQuote;
+var doubleQuote = 34; // `"`.charCodeAt(0);
+
+exports.doubleQuote = doubleQuote;
+var slash = 47; // `/`.charCodeAt(0);
+
+exports.slash = slash;
+var bang = 33; // `!`.charCodeAt(0);
+
+exports.bang = bang;
+var backslash = 92; // '\\'.charCodeAt(0);
+
+exports.backslash = backslash;
+var cr = 13; // '\r'.charCodeAt(0);
+
+exports.cr = cr;
+var feed = 12; // '\f'.charCodeAt(0);
+
+exports.feed = feed;
+var newline = 10; // '\n'.charCodeAt(0);
+
+exports.newline = newline;
+var tab = 9; // '\t'.charCodeAt(0);
+// Expose aliases primarily for readability.
+
+exports.tab = tab;
+var str = singleQuote; // No good single character representation!
+
+exports.str = str;
+var comment = -1;
+exports.comment = comment;
+var word = -2;
+exports.word = word;
+var combinator = -3;
+exports.combinator = combinator;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/tokenize.js b/node_modules/postcss-selector-parser/dist/tokenize.js
new file mode 100644
index 000000000..bee9fee63
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/tokenize.js
@@ -0,0 +1,271 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = tokenize;
+exports.FIELDS = void 0;
+
+var t = _interopRequireWildcard(require("./tokenTypes"));
+
+var _unescapable, _wordDelimiters;
+
+function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }
+
+function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+
+var unescapable = (_unescapable = {}, _unescapable[t.tab] = true, _unescapable[t.newline] = true, _unescapable[t.cr] = true, _unescapable[t.feed] = true, _unescapable);
+var wordDelimiters = (_wordDelimiters = {}, _wordDelimiters[t.space] = true, _wordDelimiters[t.tab] = true, _wordDelimiters[t.newline] = true, _wordDelimiters[t.cr] = true, _wordDelimiters[t.feed] = true, _wordDelimiters[t.ampersand] = true, _wordDelimiters[t.asterisk] = true, _wordDelimiters[t.bang] = true, _wordDelimiters[t.comma] = true, _wordDelimiters[t.colon] = true, _wordDelimiters[t.semicolon] = true, _wordDelimiters[t.openParenthesis] = true, _wordDelimiters[t.closeParenthesis] = true, _wordDelimiters[t.openSquare] = true, _wordDelimiters[t.closeSquare] = true, _wordDelimiters[t.singleQuote] = true, _wordDelimiters[t.doubleQuote] = true, _wordDelimiters[t.plus] = true, _wordDelimiters[t.pipe] = true, _wordDelimiters[t.tilde] = true, _wordDelimiters[t.greaterThan] = true, _wordDelimiters[t.equals] = true, _wordDelimiters[t.dollar] = true, _wordDelimiters[t.caret] = true, _wordDelimiters[t.slash] = true, _wordDelimiters);
+var hex = {};
+var hexChars = "0123456789abcdefABCDEF";
+
+for (var i = 0; i < hexChars.length; i++) {
+  hex[hexChars.charCodeAt(i)] = true;
+}
+/**
+ *  Returns the last index of the bar css word
+ * @param {string} css The string in which the word begins
+ * @param {number} start The index into the string where word's first letter occurs
+ */
+
+
+function consumeWord(css, start) {
+  var next = start;
+  var code;
+
+  do {
+    code = css.charCodeAt(next);
+
+    if (wordDelimiters[code]) {
+      return next - 1;
+    } else if (code === t.backslash) {
+      next = consumeEscape(css, next) + 1;
+    } else {
+      // All other characters are part of the word
+      next++;
+    }
+  } while (next < css.length);
+
+  return next - 1;
+}
+/**
+ *  Returns the last index of the escape sequence
+ * @param {string} css The string in which the sequence begins
+ * @param {number} start The index into the string where escape character (`\`) occurs.
+ */
+
+
+function consumeEscape(css, start) {
+  var next = start;
+  var code = css.charCodeAt(next + 1);
+
+  if (unescapable[code]) {// just consume the escape char
+  } else if (hex[code]) {
+    var hexDigits = 0; // consume up to 6 hex chars
+
+    do {
+      next++;
+      hexDigits++;
+      code = css.charCodeAt(next + 1);
+    } while (hex[code] && hexDigits < 6); // if fewer than 6 hex chars, a trailing space ends the escape
+
+
+    if (hexDigits < 6 && code === t.space) {
+      next++;
+    }
+  } else {
+    // the next char is part of the current word
+    next++;
+  }
+
+  return next;
+}
+
+var FIELDS = {
+  TYPE: 0,
+  START_LINE: 1,
+  START_COL: 2,
+  END_LINE: 3,
+  END_COL: 4,
+  START_POS: 5,
+  END_POS: 6
+};
+exports.FIELDS = FIELDS;
+
+function tokenize(input) {
+  var tokens = [];
+  var css = input.css.valueOf();
+  var _css = css,
+      length = _css.length;
+  var offset = -1;
+  var line = 1;
+  var start = 0;
+  var end = 0;
+  var code, content, endColumn, endLine, escaped, escapePos, last, lines, next, nextLine, nextOffset, quote, tokenType;
+
+  function unclosed(what, fix) {
+    if (input.safe) {
+      // fyi: this is never set to true.
+      css += fix;
+      next = css.length - 1;
+    } else {
+      throw input.error('Unclosed ' + what, line, start - offset, start);
+    }
+  }
+
+  while (start < length) {
+    code = css.charCodeAt(start);
+
+    if (code === t.newline) {
+      offset = start;
+      line += 1;
+    }
+
+    switch (code) {
+      case t.space:
+      case t.tab:
+      case t.newline:
+      case t.cr:
+      case t.feed:
+        next = start;
+
+        do {
+          next += 1;
+          code = css.charCodeAt(next);
+
+          if (code === t.newline) {
+            offset = next;
+            line += 1;
+          }
+        } while (code === t.space || code === t.newline || code === t.tab || code === t.cr || code === t.feed);
+
+        tokenType = t.space;
+        endLine = line;
+        endColumn = next - offset - 1;
+        end = next;
+        break;
+
+      case t.plus:
+      case t.greaterThan:
+      case t.tilde:
+      case t.pipe:
+        next = start;
+
+        do {
+          next += 1;
+          code = css.charCodeAt(next);
+        } while (code === t.plus || code === t.greaterThan || code === t.tilde || code === t.pipe);
+
+        tokenType = t.combinator;
+        endLine = line;
+        endColumn = start - offset;
+        end = next;
+        break;
+      // Consume these characters as single tokens.
+
+      case t.asterisk:
+      case t.ampersand:
+      case t.bang:
+      case t.comma:
+      case t.equals:
+      case t.dollar:
+      case t.caret:
+      case t.openSquare:
+      case t.closeSquare:
+      case t.colon:
+      case t.semicolon:
+      case t.openParenthesis:
+      case t.closeParenthesis:
+        next = start;
+        tokenType = code;
+        endLine = line;
+        endColumn = start - offset;
+        end = next + 1;
+        break;
+
+      case t.singleQuote:
+      case t.doubleQuote:
+        quote = code === t.singleQuote ? "'" : '"';
+        next = start;
+
+        do {
+          escaped = false;
+          next = css.indexOf(quote, next + 1);
+
+          if (next === -1) {
+            unclosed('quote', quote);
+          }
+
+          escapePos = next;
+
+          while (css.charCodeAt(escapePos - 1) === t.backslash) {
+            escapePos -= 1;
+            escaped = !escaped;
+          }
+        } while (escaped);
+
+        tokenType = t.str;
+        endLine = line;
+        endColumn = start - offset;
+        end = next + 1;
+        break;
+
+      default:
+        if (code === t.slash && css.charCodeAt(start + 1) === t.asterisk) {
+          next = css.indexOf('*/', start + 2) + 1;
+
+          if (next === 0) {
+            unclosed('comment', '*/');
+          }
+
+          content = css.slice(start, next + 1);
+          lines = content.split('\n');
+          last = lines.length - 1;
+
+          if (last > 0) {
+            nextLine = line + last;
+            nextOffset = next - lines[last].length;
+          } else {
+            nextLine = line;
+            nextOffset = offset;
+          }
+
+          tokenType = t.comment;
+          line = nextLine;
+          endLine = nextLine;
+          endColumn = next - nextOffset;
+        } else if (code === t.slash) {
+          next = start;
+          tokenType = code;
+          endLine = line;
+          endColumn = start - offset;
+          end = next + 1;
+        } else {
+          next = consumeWord(css, start);
+          tokenType = t.word;
+          endLine = line;
+          endColumn = next - offset;
+        }
+
+        end = next + 1;
+        break;
+    } // Ensure that the token structure remains consistent
+
+
+    tokens.push([tokenType, // [0] Token type
+    line, // [1] Starting line
+    start - offset, // [2] Starting column
+    endLine, // [3] Ending line
+    endColumn, // [4] Ending column
+    start, // [5] Start position / Source index
+    end // [6] End position
+    ]); // Reset offset for the next token
+
+    if (nextOffset) {
+      offset = nextOffset;
+      nextOffset = null;
+    }
+
+    start = end;
+  }
+
+  return tokens;
+}
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/util/ensureObject.js b/node_modules/postcss-selector-parser/dist/util/ensureObject.js
new file mode 100644
index 000000000..3472e0752
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/util/ensureObject.js
@@ -0,0 +1,22 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = ensureObject;
+
+function ensureObject(obj) {
+  for (var _len = arguments.length, props = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+    props[_key - 1] = arguments[_key];
+  }
+
+  while (props.length > 0) {
+    var prop = props.shift();
+
+    if (!obj[prop]) {
+      obj[prop] = {};
+    }
+
+    obj = obj[prop];
+  }
+}
+
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/util/getProp.js b/node_modules/postcss-selector-parser/dist/util/getProp.js
new file mode 100644
index 000000000..53e07c902
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/util/getProp.js
@@ -0,0 +1,24 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = getProp;
+
+function getProp(obj) {
+  for (var _len = arguments.length, props = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+    props[_key - 1] = arguments[_key];
+  }
+
+  while (props.length > 0) {
+    var prop = props.shift();
+
+    if (!obj[prop]) {
+      return undefined;
+    }
+
+    obj = obj[prop];
+  }
+
+  return obj;
+}
+
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/util/index.js b/node_modules/postcss-selector-parser/dist/util/index.js
new file mode 100644
index 000000000..043fda8c6
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/util/index.js
@@ -0,0 +1,22 @@
+"use strict";
+
+exports.__esModule = true;
+exports.stripComments = exports.ensureObject = exports.getProp = exports.unesc = void 0;
+
+var _unesc = _interopRequireDefault(require("./unesc"));
+
+exports.unesc = _unesc["default"];
+
+var _getProp = _interopRequireDefault(require("./getProp"));
+
+exports.getProp = _getProp["default"];
+
+var _ensureObject = _interopRequireDefault(require("./ensureObject"));
+
+exports.ensureObject = _ensureObject["default"];
+
+var _stripComments = _interopRequireDefault(require("./stripComments"));
+
+exports.stripComments = _stripComments["default"];
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/util/stripComments.js b/node_modules/postcss-selector-parser/dist/util/stripComments.js
new file mode 100644
index 000000000..c74f1fecd
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/util/stripComments.js
@@ -0,0 +1,27 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = stripComments;
+
+function stripComments(str) {
+  var s = "";
+  var commentStart = str.indexOf("/*");
+  var lastEnd = 0;
+
+  while (commentStart >= 0) {
+    s = s + str.slice(lastEnd, commentStart);
+    var commentEnd = str.indexOf("*/", commentStart + 2);
+
+    if (commentEnd < 0) {
+      return s;
+    }
+
+    lastEnd = commentEnd + 2;
+    commentStart = str.indexOf("/*", lastEnd);
+  }
+
+  s = s + str.slice(lastEnd);
+  return s;
+}
+
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/dist/util/unesc.js b/node_modules/postcss-selector-parser/dist/util/unesc.js
new file mode 100644
index 000000000..3136e7e00
--- /dev/null
+++ b/node_modules/postcss-selector-parser/dist/util/unesc.js
@@ -0,0 +1,93 @@
+"use strict";
+
+exports.__esModule = true;
+exports["default"] = unesc;
+
+// Many thanks for this post which made this migration much easier.
+// https://mathiasbynens.be/notes/css-escapes
+
+/**
+ * 
+ * @param {string} str 
+ * @returns {[string, number]|undefined}
+ */
+function gobbleHex(str) {
+  var lower = str.toLowerCase();
+  var hex = '';
+  var spaceTerminated = false;
+
+  for (var i = 0; i < 6 && lower[i] !== undefined; i++) {
+    var code = lower.charCodeAt(i); // check to see if we are dealing with a valid hex char [a-f|0-9]
+
+    var valid = code >= 97 && code <= 102 || code >= 48 && code <= 57; // https://drafts.csswg.org/css-syntax/#consume-escaped-code-point
+
+    spaceTerminated = code === 32;
+
+    if (!valid) {
+      break;
+    }
+
+    hex += lower[i];
+  }
+
+  if (hex.length === 0) {
+    return undefined;
+  }
+
+  var codePoint = parseInt(hex, 16);
+  var isSurrogate = codePoint >= 0xD800 && codePoint <= 0xDFFF; // Add special case for
+  // "If this number is zero, or is for a surrogate, or is greater than the maximum allowed code point"
+  // https://drafts.csswg.org/css-syntax/#maximum-allowed-code-point
+
+  if (isSurrogate || codePoint === 0x0000 || codePoint > 0x10FFFF) {
+    return ["\uFFFD", hex.length + (spaceTerminated ? 1 : 0)];
+  }
+
+  return [String.fromCodePoint(codePoint), hex.length + (spaceTerminated ? 1 : 0)];
+}
+
+var CONTAINS_ESCAPE = /\\/;
+
+function unesc(str) {
+  var needToProcess = CONTAINS_ESCAPE.test(str);
+
+  if (!needToProcess) {
+    return str;
+  }
+
+  var ret = "";
+
+  for (var i = 0; i < str.length; i++) {
+    if (str[i] === "\\") {
+      var gobbled = gobbleHex(str.slice(i + 1, i + 7));
+
+      if (gobbled !== undefined) {
+        ret += gobbled[0];
+        i += gobbled[1];
+        continue;
+      } // Retain a pair of \\ if double escaped `\\\\`
+      // https://github.com/postcss/postcss-selector-parser/commit/268c9a7656fb53f543dc620aa5b73a30ec3ff20e
+
+
+      if (str[i + 1] === "\\") {
+        ret += "\\";
+        i++;
+        continue;
+      } // if \\ is at the end of the string retain it
+      // https://github.com/postcss/postcss-selector-parser/commit/01a6b346e3612ce1ab20219acc26abdc259ccefb
+
+
+      if (str.length === i + 1) {
+        ret += str[i];
+      }
+
+      continue;
+    }
+
+    ret += str[i];
+  }
+
+  return ret;
+}
+
+module.exports = exports.default;
\ No newline at end of file
diff --git a/node_modules/postcss-selector-parser/package.json b/node_modules/postcss-selector-parser/package.json
new file mode 100644
index 000000000..a6f33589b
--- /dev/null
+++ b/node_modules/postcss-selector-parser/package.json
@@ -0,0 +1,78 @@
+{
+  "name": "postcss-selector-parser",
+  "version": "6.0.10",
+  "devDependencies": {
+    "@babel/cli": "^7.11.6",
+    "@babel/core": "^7.11.6",
+    "@babel/eslint-parser": "^7.11.5",
+    "@babel/eslint-plugin": "^7.11.5",
+    "@babel/plugin-proposal-class-properties": "^7.10.4",
+    "@babel/preset-env": "^7.11.5",
+    "@babel/register": "^7.11.5",
+    "ava": "^3.12.1",
+    "babel-plugin-add-module-exports": "^1.0.4",
+    "coveralls": "^3.1.0",
+    "del-cli": "^3.0.1",
+    "eslint": "^7.9.0",
+    "eslint-plugin-import": "^2.22.0",
+    "glob": "^7.1.6",
+    "minimist": "^1.2.5",
+    "nyc": "^15.1.0",
+    "postcss": "^8.0.0",
+    "semver": "^7.3.2",
+    "typescript": "^4.0.3"
+  },
+  "main": "dist/index.js",
+  "types": "postcss-selector-parser.d.ts",
+  "files": [
+    "API.md",
+    "CHANGELOG.md",
+    "LICENSE-MIT",
+    "dist",
+    "postcss-selector-parser.d.ts",
+    "!**/__tests__"
+  ],
+  "scripts": {
+    "pretest": "eslint src && tsc --noEmit postcss-selector-parser.d.ts",
+    "prepare": "del-cli dist && BABEL_ENV=publish babel src --out-dir dist --ignore /__tests__/",
+    "lintfix": "eslint --fix src",
+    "report": "nyc report --reporter=html",
+    "test": "nyc ava src/__tests__/*.js ",
+    "testone": "ava"
+  },
+  "dependencies": {
+    "cssesc": "^3.0.0",
+    "util-deprecate": "^1.0.2"
+  },
+  "license": "MIT",
+  "engines": {
+    "node": ">=4"
+  },
+  "homepage": "https://github.com/postcss/postcss-selector-parser",
+  "contributors": [
+    {
+      "name": "Ben Briggs",
+      "email": "beneb.info@gmail.com",
+      "url": "http://beneb.info"
+    },
+    {
+      "name": "Chris Eppstein",
+      "email": "chris@eppsteins.net",
+      "url": "http://twitter.com/chriseppstein"
+    }
+  ],
+  "repository": "postcss/postcss-selector-parser",
+  "ava": {
+    "require": [
+      "@babel/register"
+    ],
+    "concurrency": 5,
+    "timeout": "25s"
+  },
+  "nyc": {
+    "exclude": [
+      "node_modules",
+      "**/__tests__"
+    ]
+  }
+}
diff --git a/node_modules/postcss-selector-parser/postcss-selector-parser.d.ts b/node_modules/postcss-selector-parser/postcss-selector-parser.d.ts
new file mode 100644
index 000000000..89a2c5239
--- /dev/null
+++ b/node_modules/postcss-selector-parser/postcss-selector-parser.d.ts
@@ -0,0 +1,555 @@
+// Type definitions for postcss-selector-parser 2.2.3
+// Definitions by: Chris Eppstein <chris@eppsteins.net>
+
+/*~ Note that ES6 modules cannot directly export callable functions.
+ *~ This file should be imported using the CommonJS-style:
+ *~   import x = require('someLibrary');
+ *~
+ *~ Refer to the documentation to understand common
+ *~ workarounds for this limitation of ES6 modules.
+ */
+
+/*~ This declaration specifies that the function
+ *~ is the exported object from the file
+ */
+export = parser;
+
+// A type that's T but not U.
+type Diff<T, U> = T extends U ? never : T;
+
+// TODO: Conditional types in TS 1.8 will really clean this up.
+declare function parser(): parser.Processor<never>;
+declare function parser<Transform>(processor: parser.AsyncProcessor<Transform>): parser.Processor<Transform, never>;
+declare function parser(processor: parser.AsyncProcessor<void>): parser.Processor<never, never>;
+declare function parser<Transform>(processor: parser.SyncProcessor<Transform>): parser.Processor<Transform>;
+declare function parser(processor: parser.SyncProcessor<void>): parser.Processor<never>;
+declare function parser<Transform>(processor?: parser.SyncProcessor<Transform> | parser.AsyncProcessor<Transform>): parser.Processor<Transform>;
+
+/*~ If you want to expose types from your module as well, you can
+ *~ place them in this block. Often you will want to describe the
+ *~ shape of the return type of the function; that type should
+ *~ be declared in here, as this example shows.
+ */
+declare namespace parser {
+    /* copied from postcss -- so we don't need to add a dependency */
+    type ErrorOptions = {
+        plugin?: string;
+        word?: string;
+        index?: number
+    };
+    /* the bits we use of postcss.Rule, copied from postcss -- so we don't need to add a dependency */
+    type PostCSSRuleNode = {
+        selector: string
+        /**
+         * @returns postcss.CssSyntaxError but it's a complex object, caller
+         *   should cast to it if they have a dependency on postcss.
+         */
+        error(message: string, options?: ErrorOptions): Error;
+    };
+    /** Accepts a string  */
+    type Selectors = string | PostCSSRuleNode
+    type ProcessorFn<ReturnType = void> = (root: parser.Root) => ReturnType;
+    type SyncProcessor<Transform = void> = ProcessorFn<Transform>;
+    type AsyncProcessor<Transform = void> = ProcessorFn<PromiseLike<Transform>>;
+
+    const TAG: "tag";
+    const STRING: "string";
+    const SELECTOR: "selector";
+    const ROOT: "root";
+    const PSEUDO: "pseudo";
+    const NESTING: "nesting";
+    const ID: "id";
+    const COMMENT: "comment";
+    const COMBINATOR: "combinator";
+    const CLASS: "class";
+    const ATTRIBUTE: "attribute";
+    const UNIVERSAL: "universal";
+
+    interface NodeTypes {
+        tag: Tag,
+        string: String,
+        selector: Selector,
+        root: Root,
+        pseudo: Pseudo,
+        nesting: Nesting,
+        id: Identifier,
+        comment: Comment,
+        combinator: Combinator,
+        class: ClassName,
+        attribute: Attribute,
+        universal: Universal
+    }
+
+    type Node = NodeTypes[keyof NodeTypes];
+
+    function isNode(node: any): node is Node;
+
+    interface Options {
+        /**
+         * Preserve whitespace when true. Default: false;
+         */
+        lossless: boolean;
+        /**
+         * When true and a postcss.Rule is passed, set the result of
+         * processing back onto the rule when done. Default: false.
+         */
+        updateSelector: boolean;
+    }
+    class Processor<
+        TransformType = never,
+        SyncSelectorsType extends Selectors | never = Selectors
+    > {
+        res: Root;
+        readonly result: String;
+        ast(selectors: Selectors, options?: Partial<Options>): Promise<Root>;
+        astSync(selectors: SyncSelectorsType, options?: Partial<Options>): Root;
+        transform(selectors: Selectors, options?: Partial<Options>): Promise<TransformType>;
+        transformSync(selectors: SyncSelectorsType, options?: Partial<Options>): TransformType;
+        process(selectors: Selectors, options?: Partial<Options>): Promise<string>;
+        processSync(selectors: SyncSelectorsType, options?: Partial<Options>): string;
+    }
+    interface ParserOptions {
+        css: string;
+        error: (message: string, options: ErrorOptions) => Error;
+        options: Options;
+    }
+    class Parser {
+        input: ParserOptions;
+        lossy: boolean;
+        position: number;
+        root: Root;
+        selectors: string;
+        current: Selector;
+        constructor(input: ParserOptions);
+        /**
+         * Raises an error, if the processor is invoked on
+         * a postcss Rule node, a better error message is raised.
+         */
+        error(message: string, options?: ErrorOptions): void;
+    }
+    interface NodeSource {
+        start?: {
+            line: number,
+            column: number
+        },
+        end?: {
+            line: number,
+            column: number
+        }
+    }
+    interface SpaceAround {
+      before: string;
+      after: string;
+    }
+    interface Spaces extends SpaceAround {
+      [spaceType: string]: string | Partial<SpaceAround> | undefined;
+    }
+    interface NodeOptions<Value = string> {
+        value: Value;
+        spaces?: Partial<Spaces>;
+        source?: NodeSource;
+        sourceIndex?: number;
+    }
+    interface Base<
+        Value extends string | undefined = string,
+        ParentType extends Container | undefined = Container | undefined
+    > {
+        type: keyof NodeTypes;
+        parent: ParentType;
+        value: Value;
+        spaces: Spaces;
+        source?: NodeSource;
+        sourceIndex: number;
+        rawSpaceBefore: string;
+        rawSpaceAfter: string;
+        remove(): Node;
+        replaceWith(...nodes: Node[]): Node;
+        next(): Node;
+        prev(): Node;
+        clone(opts: {[override: string]:any}): Node;
+        /**
+         * Return whether this node includes the character at the position of the given line and column.
+         * Returns undefined if the nodes lack sufficient source metadata to determine the position.
+         * @param line 1-index based line number relative to the start of the selector.
+         * @param column 1-index based column number relative to the start of the selector.
+         */
+        isAtPosition(line: number, column: number): boolean | undefined;
+        /**
+         * Some non-standard syntax doesn't follow normal escaping rules for css,
+         * this allows the escaped value to be specified directly, allowing illegal characters to be
+         * directly inserted into css output.
+         * @param name the property to set
+         * @param value the unescaped value of the property
+         * @param valueEscaped optional. the escaped value of the property.
+         */
+        setPropertyAndEscape(name: string, value: any, valueEscaped: string): void;
+        /**
+         * When you want a value to passed through to CSS directly. This method
+         * deletes the corresponding raw value causing the stringifier to fallback
+         * to the unescaped value.
+         * @param name the property to set.
+         * @param value The value that is both escaped and unescaped.
+         */
+        setPropertyWithoutEscape(name: string, value: any): void;
+        /**
+         * Some non-standard syntax doesn't follow normal escaping rules for css.
+         * This allows non standard syntax to be appended to an existing property
+         * by specifying the escaped value. By specifying the escaped value,
+         * illegal characters are allowed to be directly inserted into css output.
+         * @param {string} name the property to set
+         * @param {any} value the unescaped value of the property
+         * @param {string} valueEscaped optional. the escaped value of the property.
+         */
+        appendToPropertyAndEscape(name: string, value: any, valueEscaped: string): void;
+        toString(): string;
+    }
+    interface ContainerOptions extends NodeOptions {
+        nodes?: Array<Node>;
+    }
+    interface Container<
+        Value extends string | undefined = string,
+        Child extends Node = Node
+    > extends Base<Value> {
+        nodes: Array<Child>;
+        append(selector: Selector): this;
+        prepend(selector: Selector): this;
+        at(index: number): Child;
+        /**
+         * Return the most specific node at the line and column number given.
+         * The source location is based on the original parsed location, locations aren't
+         * updated as selector nodes are mutated.
+         *
+         * Note that this location is relative to the location of the first character
+         * of the selector, and not the location of the selector in the overall document
+         * when used in conjunction with postcss.
+         *
+         * If not found, returns undefined.
+         * @param line The line number of the node to find. (1-based index)
+         * @param col  The column number of the node to find. (1-based index)
+         */
+        atPosition(line: number, column: number): Child;
+        index(child: Child): number;
+        readonly first: Child;
+        readonly last: Child;
+        readonly length: number;
+        removeChild(child: Child): this;
+        removeAll(): Container;
+        empty(): Container;
+        insertAfter(oldNode: Child, newNode: Child): this;
+        insertBefore(oldNode: Child, newNode: Child): this;
+        each(callback: (node: Child) => boolean | void): boolean | undefined;
+        walk(
+            callback: (node: Node) => boolean | void
+        ): boolean | undefined;
+        walkAttributes(
+            callback: (node: Attribute) => boolean | void
+        ): boolean | undefined;
+        walkClasses(
+            callback: (node: ClassName) => boolean | void
+        ): boolean | undefined;
+        walkCombinators(
+            callback: (node: Combinator) => boolean | void
+        ): boolean | undefined;
+        walkComments(
+            callback: (node: Comment) => boolean | void
+        ): boolean | undefined;
+        walkIds(
+            callback: (node: Identifier) => boolean | void
+        ): boolean | undefined;
+        walkNesting(
+            callback: (node: Nesting) => boolean | void
+        ): boolean | undefined;
+        walkPseudos(
+            callback: (node: Pseudo) => boolean | void
+        ): boolean | undefined;
+        walkTags(callback: (node: Tag) => boolean | void): boolean | undefined;
+        split(callback: (node: Child) => boolean): [Child[], Child[]];
+        map<T>(callback: (node: Child) => T): T[];
+        reduce(
+            callback: (
+                previousValue: Child,
+                currentValue: Child,
+                currentIndex: number,
+                array: readonly Child[]
+            ) => Child
+        ): Child;
+        reduce(
+            callback: (
+                previousValue: Child,
+                currentValue: Child,
+                currentIndex: number,
+                array: readonly Child[]
+            ) => Child,
+            initialValue: Child
+        ): Child;
+        reduce<T>(
+            callback: (
+                previousValue: T,
+                currentValue: Child,
+                currentIndex: number,
+                array: readonly Child[]
+            ) => T,
+            initialValue: T
+        ): T;
+        every(callback: (node: Child) => boolean): boolean;
+        some(callback: (node: Child) => boolean): boolean;
+        filter(callback: (node: Child) => boolean): Child[];
+        sort(callback: (nodeA: Child, nodeB: Child) => number): Child[];
+        toString(): string;
+    }
+    function isContainer(node: any): node is Root | Selector | Pseudo;
+
+    interface NamespaceOptions<Value extends string | undefined = string> extends NodeOptions<Value> {
+        namespace?: string | true;
+    }
+    interface Namespace<Value extends string | undefined = string> extends Base<Value> {
+        /** alias for namespace */
+        ns: string | true;
+        /**
+         *  namespace prefix.
+         */
+        namespace: string | true;
+        /**
+         * If a namespace exists, prefix the value provided with it, separated by |.
+         */
+        qualifiedName(value: string): string;
+        /**
+         * A string representing the namespace suitable for output.
+         */
+        readonly namespaceString: string;
+    }
+    function isNamespace(node: any): node is Attribute | Tag;
+
+    interface Root extends Container<undefined, Selector> {
+        type: "root";
+        /**
+         * Raises an error, if the processor is invoked on
+         * a postcss Rule node, a better error message is raised.
+         */
+        error(message: string, options?: ErrorOptions): Error;
+        nodeAt(line: number, column: number): Node
+    }
+    function root(opts: ContainerOptions): Root;
+    function isRoot(node: any): node is Root;
+
+    interface _Selector<S> extends Container<string, Diff<Node, S>> {
+        type: "selector";
+    }
+    type Selector = _Selector<Selector>;
+    function selector(opts: ContainerOptions): Selector;
+    function isSelector(node: any): node is Selector;
+
+    interface CombinatorRaws {
+        value?: string;
+        spaces?: {
+            before?: string;
+            after?: string;
+        };
+    }
+    interface Combinator extends Base {
+        type: "combinator";
+        raws?: CombinatorRaws;
+    }
+    function combinator(opts: NodeOptions): Combinator;
+    function isCombinator(node: any): node is Combinator;
+
+    interface ClassName extends Base {
+        type: "class";
+    }
+    function className(opts: NamespaceOptions): ClassName;
+    function isClassName(node: any): node is ClassName;
+
+    type AttributeOperator = "=" | "~=" | "|=" | "^=" | "$=" | "*=";
+    type QuoteMark = '"' | "'" | null;
+    interface PreferredQuoteMarkOptions {
+        quoteMark?: QuoteMark;
+        preferCurrentQuoteMark?: boolean;
+    }
+    interface SmartQuoteMarkOptions extends PreferredQuoteMarkOptions {
+        smart?: boolean;
+    }
+    interface AttributeOptions extends NamespaceOptions<string | undefined> {
+        attribute: string;
+        operator?: AttributeOperator;
+        insensitive?: boolean;
+        quoteMark?: QuoteMark;
+        /** @deprecated Use quoteMark instead. */
+        quoted?: boolean;
+        spaces?: {
+            before?: string;
+            after?: string;
+            attribute?: Partial<SpaceAround>;
+            operator?: Partial<SpaceAround>;
+            value?: Partial<SpaceAround>;
+            insensitive?: Partial<SpaceAround>;
+        }
+        raws: {
+            unquoted?: string;
+            attribute?: string;
+            operator?: string;
+            value?: string;
+            insensitive?: string;
+            spaces?: {
+                attribute?: Partial<Spaces>;
+                operator?: Partial<Spaces>;
+                value?: Partial<Spaces>;
+                insensitive?: Partial<Spaces>;
+            }
+        };
+    }
+    interface Attribute extends Namespace<string | undefined> {
+        type: "attribute";
+        attribute: string;
+        operator?: AttributeOperator;
+        insensitive?: boolean;
+        quoteMark: QuoteMark;
+        quoted?: boolean;
+        spaces: {
+            before: string;
+            after: string;
+            attribute?: Partial<Spaces>;
+            operator?: Partial<Spaces>;
+            value?: Partial<Spaces>;
+            insensitive?: Partial<Spaces>;
+        }
+        raws: {
+            /** @deprecated The attribute value is unquoted, use that instead.. */
+            unquoted?: string;
+            attribute?: string;
+            operator?: string;
+            /** The value of the attribute with quotes and escapes. */
+            value?: string;
+            insensitive?: string;
+            spaces?: {
+                attribute?: Partial<Spaces>;
+                operator?: Partial<Spaces>;
+                value?: Partial<Spaces>;
+                insensitive?: Partial<Spaces>;
+            }
+        };
+        /**
+         * The attribute name after having been qualified with a namespace.
+         */
+        readonly qualifiedAttribute: string;
+
+        /**
+         * The case insensitivity flag or an empty string depending on whether this
+         * attribute is case insensitive.
+         */
+        readonly insensitiveFlag : 'i' | '';
+
+        /**
+         * Returns the attribute's value quoted such that it would be legal to use
+         * in the value of a css file. The original value's quotation setting
+         * used for stringification is left unchanged. See `setValue(value, options)`
+         * if you want to control the quote settings of a new value for the attribute or
+         * `set quoteMark(mark)` if you want to change the quote settings of the current
+         * value.
+         *
+         * You can also change the quotation used for the current value by setting quoteMark.
+         **/
+        getQuotedValue(options?: SmartQuoteMarkOptions): string;
+
+        /**
+         * Set the unescaped value with the specified quotation options. The value
+         * provided must not include any wrapping quote marks -- those quotes will
+         * be interpreted as part of the value and escaped accordingly.
+         * @param value
+         */
+        setValue(value: string, options?: SmartQuoteMarkOptions): void;
+
+        /**
+         * Intelligently select a quoteMark value based on the value's contents. If
+         * the value is a legal CSS ident, it will not be quoted. Otherwise a quote
+         * mark will be picked that minimizes the number of escapes.
+         *
+         * If there's no clear winner, the quote mark from these options is used,
+         * then the source quote mark (this is inverted if `preferCurrentQuoteMark` is
+         * true). If the quoteMark is unspecified, a double quote is used.
+         **/
+        smartQuoteMark(options: PreferredQuoteMarkOptions): QuoteMark;
+
+        /**
+         * Selects the preferred quote mark based on the options and the current quote mark value.
+         * If you want the quote mark to depend on the attribute value, call `smartQuoteMark(opts)`
+         * instead.
+         */
+        preferredQuoteMark(options: PreferredQuoteMarkOptions): QuoteMark
+
+        /**
+         * returns the offset of the attribute part specified relative to the
+         * start of the node of the output string.
+         *
+         * * "ns" - alias for "namespace"
+         * * "namespace" - the namespace if it exists.
+         * * "attribute" - the attribute name
+         * * "attributeNS" - the start of the attribute or its namespace
+         * * "operator" - the match operator of the attribute
+         * * "value" - The value (string or identifier)
+         * * "insensitive" - the case insensitivity flag;
+         * @param part One of the possible values inside an attribute.
+         * @returns -1 if the name is invalid or the value doesn't exist in this attribute.
+         */
+        offsetOf(part: "ns" | "namespace" | "attribute" | "attributeNS" | "operator" | "value" | "insensitive"): number;
+    }
+    function attribute(opts: AttributeOptions): Attribute;
+    function isAttribute(node: any): node is Attribute;
+
+    interface Pseudo extends Container<string, Selector> {
+        type: "pseudo";
+    }
+    function pseudo(opts: ContainerOptions): Pseudo;
+    /**
+     * Checks wether the node is the Psuedo subtype of node.
+     */
+    function isPseudo(node: any): node is Pseudo;
+
+    /**
+     * Checks wether the node is, specifically, a pseudo element instead of
+     * pseudo class.
+     */
+    function isPseudoElement(node: any): node is Pseudo;
+
+    /**
+     * Checks wether the node is, specifically, a pseudo class instead of
+     * pseudo element.
+     */
+    function isPseudoClass(node: any): node is Pseudo;
+
+
+    interface Tag extends Namespace {
+        type: "tag";
+    }
+    function tag(opts: NamespaceOptions): Tag;
+    function isTag(node: any): node is Tag;
+
+    interface Comment extends Base {
+        type: "comment";
+    }
+    function comment(opts: NodeOptions): Comment;
+    function isComment(node: any): node is Comment;
+
+    interface Identifier extends Base {
+        type: "id";
+    }
+    function id(opts: any): any;
+    function isIdentifier(node: any): node is Identifier;
+
+    interface Nesting extends Base {
+        type: "nesting";
+    }
+    function nesting(opts: any): any;
+    function isNesting(node: any): node is Nesting;
+
+    interface String extends Base {
+        type: "string";
+    }
+    function string(opts: NodeOptions): String;
+    function isString(node: any): node is String;
+
+    interface Universal extends Base {
+        type: "universal";
+    }
+    function universal(opts?: NamespaceOptions): any;
+    function isUniversal(node: any): node is Universal;
+}
diff --git a/package-lock.json b/package-lock.json
index 9ff57a3ec..3eba39300 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1043,6 +1043,19 @@
         "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
       }
     },
+    "node_modules/@npmcli/query": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@npmcli/query/-/query-1.1.0.tgz",
+      "integrity": "sha512-MQWugz9zqVS3w3ccaC3tN6oruM9W8sLPahdUu6No85Rn3EIppMYISdxnxDnYuQbVO1YVaa2kkWJ/jixCWZ59tg==",
+      "dependencies": {
+        "npm-package-arg": "^9.1.0",
+        "postcss-selector-parser": "^6.0.10",
+        "semver": "^7.3.7"
+      },
+      "engines": {
+        "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+      }
+    },
     "node_modules/@npmcli/run-script": {
       "version": "4.1.7",
       "resolved": "https://registry.npmjs.org/@npmcli/run-script/-/run-script-4.1.7.tgz",
@@ -2012,6 +2025,17 @@
         "node": ">= 8"
       }
     },
+    "node_modules/cssesc": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz",
+      "integrity": "sha512-/Tb/JcjK111nNScGob5MNtsntNM1aCNUDipB/TkwZFhyDrrE47SOx/18wF2bbjgc3ZzCSKW1T5nt5EbFoAz/Vg==",
+      "bin": {
+        "cssesc": "bin/cssesc"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/cssom": {
       "version": "0.5.0",
       "dev": true,
@@ -5694,6 +5718,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/postcss-selector-parser": {
+      "version": "6.0.10",
+      "resolved": "https://registry.npmjs.org/postcss-selector-parser/-/postcss-selector-parser-6.0.10.tgz",
+      "integrity": "sha512-IQ7TZdoaqbT+LCpShg46jnZVlhWD2w6iQYAcYXfHARZ7X1t/UGhhceQDs5X0cGqKvYlHNOuv7Oa1xmb0oQuA3w==",
+      "dependencies": {
+        "cssesc": "^3.0.0",
+        "util-deprecate": "^1.0.2"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/prebuild-install": {
       "version": "6.1.4",
       "dev": true,
@@ -10007,12 +10043,14 @@
         "@npmcli/name-from-folder": "^1.0.1",
         "@npmcli/node-gyp": "^2.0.0",
         "@npmcli/package-json": "^2.0.0",
+        "@npmcli/query": "^1.1.0",
         "@npmcli/run-script": "^4.1.3",
         "bin-links": "^3.0.0",
         "cacache": "^16.0.6",
         "common-ancestor-path": "^1.0.1",
         "json-parse-even-better-errors": "^2.3.1",
         "json-stringify-nice": "^1.1.4",
+        "minimatch": "^5.1.0",
         "mkdirp": "^1.0.4",
         "mkdirp-infer-owner": "^2.0.0",
         "nopt": "^5.0.0",
diff --git a/smoke-tests/tap-snapshots/test/index.js.test.cjs b/smoke-tests/tap-snapshots/test/index.js.test.cjs
index cca28b348..68145ce52 100644
--- a/smoke-tests/tap-snapshots/test/index.js.test.cjs
+++ b/smoke-tests/tap-snapshots/test/index.js.test.cjs
@@ -26,7 +26,7 @@ All commands:
     edit, exec, explain, explore, find-dupes, fund, get, help,
     hook, init, install, install-ci-test, install-test, link,
     ll, login, logout, ls, org, outdated, owner, pack, ping,
-    pkg, prefix, profile, prune, publish, rebuild, repo,
+    pkg, prefix, profile, prune, publish, query, rebuild, repo,
     restart, root, run-script, search, set, set-script,
     shrinkwrap, star, stars, start, stop, team, test, token,
     uninstall, unpublish, unstar, update, version, view, whoami
diff --git a/tap-snapshots/test/lib/commands/completion.js.test.cjs b/tap-snapshots/test/lib/commands/completion.js.test.cjs
index 232cfec66..f08ef0f37 100644
--- a/tap-snapshots/test/lib/commands/completion.js.test.cjs
+++ b/tap-snapshots/test/lib/commands/completion.js.test.cjs
@@ -87,6 +87,7 @@ Array [
       profile
       prune
       publish
+      query
       rebuild
       repo
       restart
diff --git a/tap-snapshots/test/lib/commands/query.js.test.cjs b/tap-snapshots/test/lib/commands/query.js.test.cjs
new file mode 100644
index 000000000..0a2aa769e
--- /dev/null
+++ b/tap-snapshots/test/lib/commands/query.js.test.cjs
@@ -0,0 +1,221 @@
+/* IMPORTANT
+ * This snapshot file is auto-generated, but designed for humans.
+ * It should be checked into source control and tracked carefully.
+ * Re-generate by setting TAP_SNAPSHOT=1 and running tests.
+ * Make sure to inspect the output below.  Do not ignore changes!
+ */
+'use strict'
+exports[`test/lib/commands/query.js TAP global > should return global package 1`] = `
+[
+  {
+    "name": "lorem",
+    "version": "2.0.0",
+    "_id": "lorem@2.0.0",
+    "pkgid": "lorem@2.0.0",
+    "location": "node_modules/lorem",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-global/global/node_modules/lorem",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-global/global/node_modules/lorem",
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
+
+exports[`test/lib/commands/query.js TAP include-workspace-root > should return workspace object and root object 1`] = `
+[
+  {
+    "name": "project",
+    "workspaces": [
+      "c"
+    ],
+    "dependencies": {
+      "a": "^1.0.0",
+      "b": "^1.0.0"
+    },
+    "pkgid": "project@",
+    "location": "",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-include-workspace-root/prefix",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-include-workspace-root/prefix",
+    "resolved": null,
+    "from": [],
+    "to": [
+      "node_modules/c",
+      "node_modules/a",
+      "node_modules/b"
+    ],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  },
+  {
+    "name": "c",
+    "version": "1.0.0",
+    "_id": "c@1.0.0",
+    "pkgid": "c@1.0.0",
+    "location": "c",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-include-workspace-root/prefix/c",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-include-workspace-root/prefix/c",
+    "resolved": null,
+    "from": [],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
+
+exports[`test/lib/commands/query.js TAP linked node > should return linked node res 1`] = `
+[
+  {
+    "name": "a",
+    "version": "1.0.0",
+    "_id": "a@1.0.0",
+    "pkgid": "a@1.0.0",
+    "location": "a",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-linked-node/prefix/a",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-linked-node/prefix/a",
+    "resolved": null,
+    "from": [],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
+
+exports[`test/lib/commands/query.js TAP recursive tree > should return everything in the tree, accounting for recursion 1`] = `
+[
+  {
+    "name": "project",
+    "dependencies": {
+      "a": "^1.0.0",
+      "b": "^1.0.0"
+    },
+    "pkgid": "project@",
+    "location": "",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix",
+    "resolved": null,
+    "from": [],
+    "to": [
+      "node_modules/a",
+      "node_modules/b"
+    ],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  },
+  {
+    "pkgid": "a@",
+    "location": "node_modules/a",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix/node_modules/a",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix/node_modules/a",
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  },
+  {
+    "pkgid": "b@",
+    "location": "node_modules/b",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix/node_modules/b",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-recursive-tree/prefix/node_modules/b",
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
+
+exports[`test/lib/commands/query.js TAP simple query > should return root object and direct children 1`] = `
+[
+  {
+    "name": "project",
+    "dependencies": {
+      "a": "^1.0.0",
+      "b": "^1.0.0"
+    },
+    "peerDependencies": {
+      "c": "1.0.0"
+    },
+    "pkgid": "project@",
+    "location": "",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix",
+    "resolved": null,
+    "from": [],
+    "to": [
+      "node_modules/a",
+      "node_modules/b"
+    ],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  },
+  {
+    "pkgid": "a@",
+    "location": "node_modules/a",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix/node_modules/a",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix/node_modules/a",
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  },
+  {
+    "pkgid": "b@",
+    "location": "node_modules/b",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix/node_modules/b",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-simple-query/prefix/node_modules/b",
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
+
+exports[`test/lib/commands/query.js TAP workspace query > should return workspace object 1`] = `
+[
+  {
+    "name": "c",
+    "version": "1.0.0",
+    "_id": "c@1.0.0",
+    "pkgid": "c@1.0.0",
+    "location": "c",
+    "path": "{CWD}/test/lib/commands/tap-testdir-query-workspace-query/prefix/c",
+    "realpath": "{CWD}/test/lib/commands/tap-testdir-query-workspace-query/prefix/c",
+    "resolved": null,
+    "from": [],
+    "to": [],
+    "dev": false,
+    "inBundle": false,
+    "deduped": false
+  }
+]
+`
diff --git a/tap-snapshots/test/lib/load-all-commands.js.test.cjs b/tap-snapshots/test/lib/load-all-commands.js.test.cjs
index 88b1d4955..eac037f4b 100644
--- a/tap-snapshots/test/lib/load-all-commands.js.test.cjs
+++ b/tap-snapshots/test/lib/load-all-commands.js.test.cjs
@@ -693,6 +693,20 @@ Options:
 Run "npm help publish" for more info
 `
 
+exports[`test/lib/load-all-commands.js TAP load each command query > must match snapshot 1`] = `
+Retrieve a filtered list of packages
+
+Usage:
+npm query <selector>
+
+Options:
+[-g|--global]
+[-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
+[-ws|--workspaces] [--include-workspace-root]
+
+Run "npm help query" for more info
+`
+
 exports[`test/lib/load-all-commands.js TAP load each command rebuild > must match snapshot 1`] = `
 Rebuild a package
 
diff --git a/tap-snapshots/test/lib/npm.js.test.cjs b/tap-snapshots/test/lib/npm.js.test.cjs
index ea7d2a7e1..094792afd 100644
--- a/tap-snapshots/test/lib/npm.js.test.cjs
+++ b/tap-snapshots/test/lib/npm.js.test.cjs
@@ -26,7 +26,7 @@ All commands:
     edit, exec, explain, explore, find-dupes, fund, get, help,
     hook, init, install, install-ci-test, install-test, link,
     ll, login, logout, ls, org, outdated, owner, pack, ping,
-    pkg, prefix, profile, prune, publish, rebuild, repo,
+    pkg, prefix, profile, prune, publish, query, rebuild, repo,
     restart, root, run-script, search, set, set-script,
     shrinkwrap, star, stars, start, stop, team, test, token,
     uninstall, unpublish, unstar, update, version, view, whoami
@@ -62,7 +62,7 @@ All commands:
     edit, exec, explain, explore, find-dupes, fund, get, help,
     hook, init, install, install-ci-test, install-test, link,
     ll, login, logout, ls, org, outdated, owner, pack, ping,
-    pkg, prefix, profile, prune, publish, rebuild, repo,
+    pkg, prefix, profile, prune, publish, query, rebuild, repo,
     restart, root, run-script, search, set, set-script,
     shrinkwrap, star, stars, start, stop, team, test, token,
     uninstall, unpublish, unstar, update, version, view, whoami
@@ -98,7 +98,7 @@ All commands:
     edit, exec, explain, explore, find-dupes, fund, get, help,
     hook, init, install, install-ci-test, install-test, link,
     ll, login, logout, ls, org, outdated, owner, pack, ping,
-    pkg, prefix, profile, prune, publish, rebuild, repo,
+    pkg, prefix, profile, prune, publish, query, rebuild, repo,
     restart, root, run-script, search, set, set-script,
     shrinkwrap, star, stars, start, stop, team, test, token,
     uninstall, unpublish, unstar, update, version, view, whoami
@@ -134,7 +134,7 @@ All commands:
     edit, exec, explain, explore, find-dupes, fund, get, help,
     hook, init, install, install-ci-test, install-test, link,
     ll, login, logout, ls, org, outdated, owner, pack, ping,
-    pkg, prefix, profile, prune, publish, rebuild, repo,
+    pkg, prefix, profile, prune, publish, query, rebuild, repo,
     restart, root, run-script, search, set, set-script,
     shrinkwrap, star, stars, start, stop, team, test, token,
     uninstall, unpublish, unstar, update, version, view, whoami
@@ -746,6 +746,18 @@ All commands:
                     
                     Run "npm help publish" for more info
 
+    query           Retrieve a filtered list of packages
+                    
+                    Usage:
+                    npm query <selector>
+                    
+                    Options:
+                    [-g|--global]
+                    [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
+                    [-ws|--workspaces] [--include-workspace-root]
+                    
+                    Run "npm help query" for more info
+
     rebuild         Rebuild a package
                     
                     Usage:
diff --git a/tap-snapshots/test/lib/utils/cmd-list.js.test.cjs b/tap-snapshots/test/lib/utils/cmd-list.js.test.cjs
index 9413f8e9a..dd0df9b86 100644
--- a/tap-snapshots/test/lib/utils/cmd-list.js.test.cjs
+++ b/tap-snapshots/test/lib/utils/cmd-list.js.test.cjs
@@ -218,6 +218,11 @@ Object {
     "publi": "publish",
     "publis": "publish",
     "publish": "publish",
+    "q": "query",
+    "qu": "query",
+    "que": "query",
+    "quer": "query",
+    "query": "query",
     "r": "r",
     "rb": "rb",
     "reb": "rebuild",
@@ -453,6 +458,7 @@ Object {
     "profile",
     "prune",
     "publish",
+    "query",
     "rebuild",
     "repo",
     "restart",
diff --git a/test/lib/commands/query.js b/test/lib/commands/query.js
new file mode 100644
index 000000000..fb5b4843c
--- /dev/null
+++ b/test/lib/commands/query.js
@@ -0,0 +1,199 @@
+const t = require('tap')
+const { load: loadMockNpm } = require('../../fixtures/mock-npm')
+
+t.cleanSnapshot = (str) => {
+  const normalizePath = p => p
+    .replace(/\\+/g, '/')
+    .replace(/\r\n/g, '\n')
+  return normalizePath(str)
+    .replace(new RegExp(normalizePath(process.cwd()), 'g'), '{CWD}')
+    // normalize between windows and posix
+    .replace(new RegExp('lib/node_modules', 'g'), 'node_modules')
+}
+
+t.test('simple query', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    prefixDir: {
+      node_modules: {
+        a: {
+          name: 'a',
+          version: '1.0.0',
+        },
+        b: {
+          name: 'b',
+          version: '^2.0.0',
+        },
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        dependencies: {
+          a: '^1.0.0',
+          b: '^1.0.0',
+        },
+        peerDependencies: {
+          c: '1.0.0',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', [':root, :root > *'])
+  t.matchSnapshot(joinedOutput(), 'should return root object and direct children')
+})
+
+t.test('recursive tree', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    prefixDir: {
+      node_modules: {
+        a: {
+          name: 'a',
+          version: '1.0.0',
+        },
+        b: {
+          name: 'b',
+          version: '^2.0.0',
+          dependencies: {
+            a: '1.0.0',
+          },
+        },
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        dependencies: {
+          a: '^1.0.0',
+          b: '^1.0.0',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', ['*'])
+  t.matchSnapshot(joinedOutput(), 'should return everything in the tree, accounting for recursion')
+})
+t.test('workspace query', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    config: {
+      workspaces: ['c'],
+    },
+    prefixDir: {
+      node_modules: {
+        a: {
+          name: 'a',
+          version: '1.0.0',
+        },
+        b: {
+          name: 'b',
+          version: '^2.0.0',
+        },
+        c: t.fixture('symlink', '../c'),
+      },
+      c: {
+        'package.json': JSON.stringify({
+          name: 'c',
+          version: '1.0.0',
+        }),
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        workspaces: ['c'],
+        dependencies: {
+          a: '^1.0.0',
+          b: '^1.0.0',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', [':scope'], ['c'])
+  t.matchSnapshot(joinedOutput(), 'should return workspace object')
+})
+
+t.test('include-workspace-root', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    config: {
+      'include-workspace-root': true,
+      workspaces: ['c'],
+    },
+    prefixDir: {
+      node_modules: {
+        a: {
+          name: 'a',
+          version: '1.0.0',
+        },
+        b: {
+          name: 'b',
+          version: '^2.0.0',
+        },
+        c: t.fixture('symlink', '../c'),
+      },
+      c: {
+        'package.json': JSON.stringify({
+          name: 'c',
+          version: '1.0.0',
+        }),
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        workspaces: ['c'],
+        dependencies: {
+          a: '^1.0.0',
+          b: '^1.0.0',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', [':scope'], ['c'])
+  t.matchSnapshot(joinedOutput(), 'should return workspace object and root object')
+})
+t.test('linked node', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    prefixDir: {
+      node_modules: {
+        a: t.fixture('symlink', '../a'),
+      },
+      a: {
+        'package.json': JSON.stringify({
+          name: 'a',
+          version: '1.0.0',
+        }),
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        dependencies: {
+          a: 'file:./a',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', ['[name=a]'])
+  t.matchSnapshot(joinedOutput(), 'should return linked node res')
+})
+
+t.test('global', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    config: {
+      global: true,
+    },
+    // This is a global dir that works in both windows and non-windows, that's
+    // why it has two node_modules folders
+    globalPrefixDir: {
+      node_modules: {
+        lorem: {
+          'package.json': JSON.stringify({
+            name: 'lorem',
+            version: '2.0.0',
+          }),
+        },
+      },
+      lib: {
+        node_modules: {
+          lorem: {
+            'package.json': JSON.stringify({
+              name: 'lorem',
+              version: '2.0.0',
+            }),
+          },
+        },
+      },
+    },
+  })
+  await npm.exec('query', ['[name=lorem]'])
+  t.matchSnapshot(joinedOutput(), 'should return global package')
+})
diff --git a/workspaces/arborist/lib/node.js b/workspaces/arborist/lib/node.js
index 66d46d746..be9735657 100644
--- a/workspaces/arborist/lib/node.js
+++ b/workspaces/arborist/lib/node.js
@@ -69,6 +69,8 @@ const consistentResolve = require('./consistent-resolve.js')
 const printableTree = require('./printable.js')
 const CaseInsensitiveMap = require('./case-insensitive-map.js')
 
+const querySelectorAll = require('./query-selector-all.js')
+
 class Node {
   constructor (options) {
     // NB: path can be null if it's a link target
@@ -1446,6 +1448,12 @@ class Node {
     return base === name && basename(nm) === 'node_modules' ? dir : false
   }
 
+  // maybe accept both string value or array of strings
+  // seems to be what dom API does
+  querySelectorAll (query) {
+    return querySelectorAll(this, query)
+  }
+
   toJSON () {
     return printableTree(this)
   }
diff --git a/workspaces/arborist/lib/query-selector-all.js b/workspaces/arborist/lib/query-selector-all.js
new file mode 100644
index 000000000..f4903f3e2
--- /dev/null
+++ b/workspaces/arborist/lib/query-selector-all.js
@@ -0,0 +1,561 @@
+'use strict'
+
+const { resolve } = require('path')
+const { parser, arrayDelimiter } = require('@npmcli/query')
+const localeCompare = require('@isaacs/string-locale-compare')('en')
+const npa = require('npm-package-arg')
+const minimatch = require('minimatch')
+const semver = require('semver')
+
+// handle results for parsed query asts, results are stored in a map that has a
+// key that points to each ast selector node and stores the resulting array of
+// arborist nodes as its value, that is essential to how we handle multiple
+// query selectors, e.g: `#a, #b, #c` <- 3 diff ast selector nodes
+class Results {
+  #currentAstSelector
+  #initialItems
+  #inventory
+  #pendingCombinator
+  #results = new Map()
+  #targetNode
+
+  constructor (opts) {
+    this.#currentAstSelector = opts.rootAstNode.nodes[0]
+    this.#inventory = opts.inventory
+    this.#initialItems = opts.initialItems
+    this.#targetNode = opts.targetNode
+
+    this.currentResults = this.#initialItems
+
+    // reset by rootAstNode walker
+    this.currentAstNode = opts.rootAstNode
+  }
+
+  get currentResults () {
+    return this.#results.get(this.#currentAstSelector)
+  }
+
+  set currentResults (value) {
+    this.#results.set(this.#currentAstSelector, value)
+  }
+
+  // retrieves the initial items to which start the filtering / matching
+  // for most of the different types of recognized ast nodes, e.g: class (aka
+  // depType), id, *, etc in different contexts we need to start with the
+  // current list of filtered results, for example a query for `.workspace`
+  // actually means the same as `*.workspace` so we want to start with the full
+  // inventory if that's the first ast node we're reading but if it appears in
+  // the middle of a query it should respect the previous filtered results,
+  // combinators are a special case in which we always want to have the
+  // complete inventory list in order to use the left-hand side ast node as a
+  // filter combined with the element on its right-hand side
+  get initialItems () {
+    const firstParsed =
+      (this.currentAstNode.parent.nodes[0] === this.currentAstNode) &&
+      (this.currentAstNode.parent.parent.type === 'root')
+
+    if (firstParsed) {
+      return this.#initialItems
+    }
+    if (this.currentAstNode.prev().type === 'combinator') {
+      return this.#inventory
+    }
+    return this.currentResults
+  }
+
+  // combinators need information about previously filtered items along
+  // with info of the items parsed / retrieved from the selector right
+  // past the combinator, for this reason combinators are stored and
+  // only ran as the last part of each selector logic
+  processPendingCombinator (nextResults) {
+    if (this.#pendingCombinator) {
+      const res = this.#pendingCombinator(this.currentResults, nextResults)
+      this.#pendingCombinator = null
+      this.currentResults = res
+    } else {
+      this.currentResults = nextResults
+    }
+  }
+
+  // when collecting results to a root astNode, we traverse the list of child
+  // selector nodes and collect all of their resulting arborist nodes into a
+  // single/flat Set of items, this ensures we also deduplicate items
+  collect (rootAstNode) {
+    return new Set(rootAstNode.nodes.flatMap(n => this.#results.get(n)))
+  }
+
+  // selector types map to the '.type' property of the ast nodes via `${astNode.type}Type`
+  //
+  // attribute selector [name=value], etc
+  attributeType () {
+    const nextResults = this.initialItems.filter(node =>
+      attributeMatch(this.currentAstNode, node.package)
+    )
+    this.processPendingCombinator(nextResults)
+  }
+
+  // dependency type selector (i.e. .prod, .dev, etc)
+  // css calls this class, we interpret is as dependency type
+  classType () {
+    const depTypeFn = depTypes[String(this.currentAstNode)]
+    if (!depTypeFn) {
+      throw Object.assign(
+        new Error(`\`${String(this.currentAstNode)}\` is not a supported dependency type.`),
+        { code: 'EQUERYNODEPTYPE' }
+      )
+    }
+    const nextResults = depTypeFn(this.initialItems)
+    this.processPendingCombinator(nextResults)
+  }
+
+  // combinators (i.e. '>', ' ', '~')
+  combinatorType () {
+    this.#pendingCombinator = combinators[String(this.currentAstNode)]
+  }
+
+  // name selectors (i.e. #foo, #foo@1.0.0)
+  // css calls this id, we interpret it as name
+  idType () {
+    const spec = npa(this.currentAstNode.value)
+    const nextResults = this.initialItems.filter(node =>
+      (node.name === spec.name || node.package.name === spec.name) &&
+      (semver.satisfies(node.version, spec.fetchSpec) || !spec.rawSpec))
+    this.processPendingCombinator(nextResults)
+  }
+
+  // pseudo selectors (prefixed with :)
+  pseudoType () {
+    const pseudoFn = `${this.currentAstNode.value.slice(1)}Pseudo`
+    if (!this[pseudoFn]) {
+      throw Object.assign(
+        new Error(`\`${this.currentAstNode.value
+        }\` is not a supported pseudo selector.`),
+        { code: 'EQUERYNOPSEUDO' }
+      )
+    }
+    const nextResults = this[pseudoFn]()
+    this.processPendingCombinator(nextResults)
+  }
+
+  selectorType () {
+    this.#currentAstSelector = this.currentAstNode
+    // starts a new array in which resulting items
+    // can be stored for each given ast selector
+    if (!this.currentResults) {
+      this.currentResults = []
+    }
+  }
+
+  universalType () {
+    this.processPendingCombinator(this.initialItems)
+  }
+
+  // pseudo selectors map to the 'value' property of the pseudo selectors in the ast nodes
+  // via selectors via `${value.slice(1)}Pseudo`
+  attrPseudo () {
+    const { lookupProperties, attributeMatcher } = this.currentAstNode
+
+    return this.initialItems.filter(node => {
+      let objs = [node.package]
+      for (const prop of lookupProperties) {
+        // if an isArray symbol is found that means we'll need to iterate
+        // over the previous found array to basically make sure we traverse
+        // all its indexes testing for possible objects that may eventually
+        // hold more keys specified in a selector
+        if (prop === arrayDelimiter) {
+          objs = objs.flat()
+          continue
+        }
+
+        // otherwise just maps all currently found objs
+        // to the next prop from the lookup properties list,
+        // filters out any empty key lookup
+        objs = objs.flatMap(obj => obj[prop] || [])
+
+        // in case there's no property found in the lookup
+        // just filters that item out
+        const noAttr = objs.every(obj => !obj)
+        if (noAttr) {
+          return false
+        }
+      }
+
+      // if any of the potential object matches
+      // that item should be in the final result
+      return objs.some(obj => attributeMatch(attributeMatcher, obj))
+    })
+  }
+
+  emptyPseudo () {
+    return this.initialItems.filter(node => node.edgesOut.size === 0)
+  }
+
+  extraneousPseudo () {
+    return this.initialItems.filter(node => node.extraneous)
+  }
+
+  hasPseudo () {
+    const found = []
+    for (const item of this.initialItems) {
+      const res = retrieveNodesFromParsedAst({
+        // This is the one time initialItems differs from inventory
+        initialItems: [item],
+        inventory: this.#inventory,
+        rootAstNode: this.currentAstNode.nestedNode,
+        targetNode: item,
+      })
+      if (res.size > 0) {
+        found.push(item)
+      }
+    }
+    return found
+  }
+
+  invalidPseudo () {
+    const found = []
+    for (const node of this.initialItems) {
+      for (const edge of node.edgesIn) {
+        if (edge.invalid) {
+          found.push(node)
+          break
+        }
+      }
+    }
+    return found
+  }
+
+  isPseudo () {
+    const res = retrieveNodesFromParsedAst({
+      initialItems: this.initialItems,
+      inventory: this.#inventory,
+      rootAstNode: this.currentAstNode.nestedNode,
+      targetNode: this.currentAstNode,
+    })
+    return [...res]
+  }
+
+  linkPseudo () {
+    return this.initialItems.filter(node => node.isLink || (node.isTop && !node.isRoot))
+  }
+
+  missingPseudo () {
+    return this.#inventory.reduce((res, node) => {
+      for (const edge of node.edgesOut.values()) {
+        if (edge.missing) {
+          const pkg = { name: edge.name, version: edge.spec }
+          res.push(new this.#targetNode.constructor({ pkg }))
+        }
+      }
+      return res
+    }, [])
+  }
+
+  notPseudo () {
+    const res = retrieveNodesFromParsedAst({
+      initialItems: this.initialItems,
+      inventory: this.#inventory,
+      rootAstNode: this.currentAstNode.nestedNode,
+      targetNode: this.currentAstNode,
+    })
+    const internalSelector = new Set(res)
+    return this.initialItems.filter(node =>
+      !internalSelector.has(node))
+  }
+
+  pathPseudo () {
+    return this.initialItems.filter(node => {
+      if (!this.currentAstNode.pathValue) {
+        return true
+      }
+      return minimatch(
+        node.realpath.replace(/\\+/g, '/'),
+        resolve(node.root.realpath, this.currentAstNode.pathValue).replace(/\\+/g, '/')
+      )
+    })
+  }
+
+  privatePseudo () {
+    return this.initialItems.filter(node => node.package.private)
+  }
+
+  rootPseudo () {
+    return this.initialItems.filter(node => node === this.#targetNode.root)
+  }
+
+  scopePseudo () {
+    return this.initialItems.filter(node => node === this.#targetNode)
+  }
+
+  semverPseudo () {
+    if (!this.currentAstNode.semverValue) {
+      return this.initialItems
+    }
+    return this.initialItems.filter(node =>
+      semver.satisfies(node.version, this.currentAstNode.semverValue))
+  }
+
+  typePseudo () {
+    if (!this.currentAstNode.typeValue) {
+      return this.initialItems
+    }
+    return this.initialItems
+      .flatMap(node => {
+        const found = []
+        for (const edge of node.edgesIn) {
+          if (npa(`${edge.name}@${edge.spec}`).type === this.currentAstNode.typeValue) {
+            found.push(edge.to)
+          }
+        }
+        return found
+      })
+  }
+
+  dedupedPseudo () {
+    return this.initialItems.filter(node => node.target.edgesIn.size > 1)
+  }
+}
+
+// operators for attribute selectors
+const attributeOperators = {
+  // existence of the attribute
+  '' ({ attr }) {
+    return Boolean(attr)
+  },
+  // attribute value is equivalent
+  '=' ({ attr, value, insensitive }) {
+    return attr === value
+  },
+  // attribute value contains word
+  '~=' ({ attr, value, insensitive }) {
+    return (attr.match(/\w+/g) || []).includes(value)
+  },
+  // attribute value contains string
+  '*=' ({ attr, value, insensitive }) {
+    return attr.includes(value)
+  },
+  // attribute value is equal or starts with
+  '|=' ({ attr, value, insensitive }) {
+    return attr.startsWith(`${value}-`)
+  },
+  // attribute value starts with
+  '^=' ({ attr, value, insensitive }) {
+    return attr.startsWith(value)
+  },
+  // attribute value ends with
+  '$=' ({ attr, value, insensitive }) {
+    return attr.endsWith(value)
+  },
+}
+
+const attributeOperator = ({ attr, value, insensitive, operator }) => {
+  if (typeof attr === 'number') {
+    attr = String(attr)
+  }
+  if (typeof attr !== 'string') {
+    // It's an object or an array, bail
+    return false
+  }
+  if (insensitive) {
+    attr = attr.toLowerCase()
+  }
+  return attributeOperators[operator]({
+    attr,
+    insensitive,
+    value,
+  })
+}
+
+const attributeMatch = (matcher, obj) => {
+  const insensitive = !!matcher.insensitive
+  const operator = matcher.operator || ''
+  const attribute = matcher.qualifiedAttribute
+  let value = matcher.value || ''
+  if (insensitive) {
+    value = value.toLowerCase()
+  }
+  // in case the current object is an array
+  // then we try to match every item in the array
+  if (Array.isArray(obj[attribute])) {
+    return obj[attribute].find((i, index) => {
+      const attr = obj[attribute][index] || ''
+      return attributeOperator({ attr, value, insensitive, operator })
+    })
+  } else {
+    const attr = obj[attribute] || ''
+    return attributeOperator({ attr, value, insensitive, operator })
+  }
+}
+
+const edgeIsType = (node, type, seen = new Set()) => {
+  for (const edgeIn of node.edgesIn) {
+    // TODO Need a test with an infinite loop
+    if (seen.has(edgeIn)) {
+      continue
+    }
+    seen.add(edgeIn)
+    if (edgeIn.type === type || edgeIn.from[type] || edgeIsType(edgeIn.from, type, seen)) {
+      return true
+    }
+  }
+  return false
+}
+
+const filterByType = (nodes, type) => {
+  const found = []
+  for (const node of nodes) {
+    if (node[type] || edgeIsType(node, type)) {
+      found.push(node)
+    }
+  }
+  return found
+}
+
+const depTypes = {
+  // dependency
+  '.prod' (prevResults) {
+    const found = []
+    for (const node of prevResults) {
+      if (!node.dev) {
+        found.push(node)
+      }
+    }
+    return found
+  },
+  // devDependency
+  '.dev' (prevResults) {
+    return filterByType(prevResults, 'dev')
+  },
+  // optionalDependency
+  '.optional' (prevResults) {
+    return filterByType(prevResults, 'optional')
+  },
+  // peerDependency
+  '.peer' (prevResults) {
+    return filterByType(prevResults, 'peer')
+  },
+  // workspace
+  '.workspace' (prevResults) {
+    return prevResults.filter(node => node.isWorkspace)
+  },
+  // bundledDependency
+  '.bundled' (prevResults) {
+    return prevResults.filter(node => node.inBundle)
+  },
+}
+
+// checks if a given node has a direct parent in any of the nodes provided in
+// the compare nodes array
+const hasParent = (node, compareNodes) => {
+  // All it takes is one so we loop and return on the first hit
+  for (const compareNode of compareNodes) {
+    // follows logical parent for link anscestors
+    if (node.isTop && (node.resolveParent === compareNode)) {
+      return true
+    }
+    // follows edges-in to check if they match a possible parent
+    for (const edge of node.edgesIn) {
+      if (edge && edge.from === compareNode) {
+        return true
+      }
+    }
+  }
+  return false
+}
+
+// checks if a given node is a descendant of any of the nodes provided in the
+// compareNodes array
+const hasAscendant = (node, compareNodes, seen = new Set()) => {
+  // TODO (future) loop over ancestry property
+  if (hasParent(node, compareNodes)) {
+    return true
+  }
+
+  if (node.isTop && node.resolveParent) {
+    return hasAscendant(node.resolveParent, compareNodes)
+  }
+  for (const edge of node.edgesIn) {
+    // TODO Need a test with an infinite loop
+    if (seen.has(edge)) {
+      continue
+    }
+    seen.add(edge)
+    if (edge && edge.from && hasAscendant(edge.from, compareNodes, seen)) {
+      return true
+    }
+  }
+  return false
+}
+
+const combinators = {
+  // direct descendant
+  '>' (prevResults, nextResults) {
+    return nextResults.filter(node => hasParent(node, prevResults))
+  },
+  // any descendant
+  ' ' (prevResults, nextResults) {
+    return nextResults.filter(node => hasAscendant(node, prevResults))
+  },
+  // sibling
+  '~' (prevResults, nextResults) {
+    // Return any node in nextResults that is a sibling of (aka shares a
+    // parent with) a node in prevResults
+    const parentNodes = new Set() // Parents of everything in prevResults
+    for (const node of prevResults) {
+      for (const edge of node.edgesIn) {
+        // edge.from always exists cause it's from another node's edgesIn
+        parentNodes.add(edge.from)
+      }
+    }
+    return nextResults.filter(node =>
+      !prevResults.includes(node) && hasParent(node, [...parentNodes])
+    )
+  },
+}
+
+const retrieveNodesFromParsedAst = (opts) => {
+  // when we first call this it's the parsed query.  all other times it's
+  // results.currentNode.nestedNode
+  const rootAstNode = opts.rootAstNode
+
+  if (!rootAstNode.nodes) {
+    return new Set()
+  }
+
+  const results = new Results(opts)
+
+  rootAstNode.walk((nextAstNode) => {
+    // This is the only place we reset currentAstNode
+    results.currentAstNode = nextAstNode
+    const updateFn = `${results.currentAstNode.type}Type`
+    if (typeof results[updateFn] !== 'function') {
+      throw Object.assign(
+        new Error(`\`${results.currentAstNode.type}\` is not a supported selector.`),
+        { code: 'EQUERYNOSELECTOR' }
+      )
+    }
+    results[updateFn]()
+  })
+
+  return results.collect(rootAstNode)
+}
+
+// We are keeping this async in the event that we do add async operators, we
+// won't have to have a breaking change on this function signature.
+const querySelectorAll = async (targetNode, query) => {
+  // This never changes ever we just pass it around. But we can't scope it to
+  // this whole file if we ever want to support concurrent calls to this
+  // function.
+  const inventory = [...targetNode.root.inventory.values()]
+  // res is a Set of items returned for each parsed css ast selector
+  const res = retrieveNodesFromParsedAst({
+    initialItems: inventory,
+    inventory,
+    rootAstNode: parser(query),
+    targetNode,
+  })
+
+  // returns nodes ordered by realpath
+  return [...res].sort((a, b) => localeCompare(a.location, b.location))
+}
+
+module.exports = querySelectorAll
diff --git a/workspaces/arborist/package.json b/workspaces/arborist/package.json
index 48814eda6..9c87667c5 100644
--- a/workspaces/arborist/package.json
+++ b/workspaces/arborist/package.json
@@ -11,12 +11,14 @@
     "@npmcli/name-from-folder": "^1.0.1",
     "@npmcli/node-gyp": "^2.0.0",
     "@npmcli/package-json": "^2.0.0",
+    "@npmcli/query": "^1.1.0",
     "@npmcli/run-script": "^4.1.3",
     "bin-links": "^3.0.0",
     "cacache": "^16.0.6",
     "common-ancestor-path": "^1.0.1",
     "json-parse-even-better-errors": "^2.3.1",
     "json-stringify-nice": "^1.1.4",
+    "minimatch": "^5.1.0",
     "mkdirp": "^1.0.4",
     "mkdirp-infer-owner": "^2.0.0",
     "nopt": "^5.0.0",
diff --git a/workspaces/arborist/test/node.js b/workspaces/arborist/test/node.js
index 36856a4cc..0db439cba 100644
--- a/workspaces/arborist/test/node.js
+++ b/workspaces/arborist/test/node.js
@@ -62,8 +62,8 @@ t.test('basic instantiation', t => {
   t.end()
 })
 
-t.test('testing with dep tree', t => {
-  const runTest = rootMetadata => t => {
+t.test('testing with dep tree', async t => {
+  const runTest = rootMetadata => async t => {
     const root = new Node({
       pkg: {
         name: 'root',
@@ -115,6 +115,10 @@ t.test('testing with dep tree', t => {
     t.equal(meta.isDescendantOf(root), true, 'meta descends from root')
     t.equal(meta.root, root, 'meta rooted in same tree via parent')
 
+    // retrieve a node using querySelectorAll
+    const queryResult = await root.querySelectorAll('* #meta')
+    t.same(queryResult, [meta], 'should retrieve node using querySelectorAll')
+
     const bundled = new Node({
       pkg: {
         name: 'bundled',
@@ -344,14 +348,14 @@ t.test('testing with dep tree', t => {
     t.end()
   }
 
-  t.test('without meta', runTest())
+  t.test('without meta', await runTest())
   const meta = new Shrinkwrap({ path: '/home/user/projects/root' })
   meta.data = {
     lockfileVersion: 2,
     packages: {},
     dependencies: {},
   }
-  t.test('with meta', runTest(meta))
+  t.test('with meta', await runTest(meta))
 
   t.end()
 })
diff --git a/workspaces/arborist/test/query-selector-all.js b/workspaces/arborist/test/query-selector-all.js
new file mode 100644
index 000000000..ec8c11612
--- /dev/null
+++ b/workspaces/arborist/test/query-selector-all.js
@@ -0,0 +1,704 @@
+'use strict'
+
+const t = require('tap')
+const Arborist = require('..')
+
+const q = require('../lib/query-selector-all.js')
+
+// test helper that spits out pkgid for readability
+// and deduplicates link/target from results
+const querySelectorAll = async (tree, query) => {
+  const res = await q(tree, query)
+  return [...new Set(res.map(i => i.pkgid))]
+}
+
+t.test('query-selector-all', async t => {
+  /*
+   fixture tree:
+
+    query-selector-all-tests@1.0.0
+    ├── @npmcli/abbrev@2.0.0 (extraneous)
+    ├─┬ a@1.0.0 -> ./a (production dep of query-selector-all-tests, workspace)
+    │ └─┬ baz@1.0.0 (optional dep of a)
+    │   └── lorem@1.0.0 (production dep of baz)
+    ├── abbrev@1.1.1 (production dep of query-selector-all-tests)
+    ├─┬ b@1.0.0 -> ./b (workspace)
+    │ └── bar@2.0.0 (production dep of b, deduped)
+    ├─┬ bar@2.0.0 (production dep of query-selector-all-tests)
+    │ └── moo@3.0.0 (production dep of bar)
+    ├─┬ foo@2.2.2 (dev dep of query-selector-all-tests)
+    │ ├─┬ bar@1.4.0 (production dep of foo, deduped)
+    │ │ └── dasher@2.0.0 (peer dep of bar)
+    │ └── dash-separated-pkg@1.0.0 (production dep of foo)
+    ├── moo@3.0.0 (dev dep of query-selector-all-tests)
+    └─┬ recur@1.0.0 (dev dep of query-selector-all-tests)
+      └─┬ sive@1.0.0 (production dep of recur)
+        └── recur@1.0.0 (recursive production dep of recur, deduped)
+
+   */
+  const path = t.testdir({
+    node_modules: {
+      '@npmcli': {
+        abbrev: {
+          'package.json': JSON.stringify({
+            name: '@npmcli/abbrev',
+            version: '2.0.0-beta.45',
+          }),
+        },
+      },
+      a: t.fixture('symlink', '../a'),
+      abbrev: {
+        'package.json': JSON.stringify({
+          name: 'abbrev',
+          version: '1.1.1',
+          license: 'ISC',
+        }),
+      },
+      b: t.fixture('symlink', '../b'),
+      bar: {
+        'package.json': JSON.stringify({
+          name: 'bar',
+          version: '2.0.0',
+          dependencies: {
+            moo: '3.0.0',
+          },
+          arbitrary: {
+            foo: [
+              false,
+              'foo',
+              'bar',
+              { funding: { type: 'GH' } },
+              { funding: { type: 'MS' } },
+              10000,
+              13000,
+              15000,
+            ],
+            bar: 'bar',
+            baz: ['a', 'b', 'c'],
+          },
+        }),
+      },
+      baz: {
+        'package.json': JSON.stringify({
+          name: 'baz',
+          version: '1.0.0',
+          license: ['ISC', 'Something'],
+          dependencies: {
+            lorem: 'latest',
+          },
+        }),
+      },
+      foo: {
+        node_modules: {
+          bar: {
+            'package.json': JSON.stringify({
+              name: 'bar',
+              version: '1.4.0',
+              peerDependencies: {
+                dasher: '2.0.0',
+              },
+            }),
+          },
+        },
+        'package.json': JSON.stringify({
+          name: 'foo',
+          version: '2.2.2',
+          arbitrary: 'foo key',
+          dependencies: {
+            bar: '^1.0.0',
+            'dash-separated-pkg': '^1.0.0',
+          },
+        }),
+      },
+      'dash-separated-pkg': {
+        'package.json': JSON.stringify({
+          name: 'dash-separated-pkg',
+          version: '1.0.0',
+          description: 'One of the best libraries every dev should know about.',
+        }),
+      },
+      dasher: {
+        'package.json': JSON.stringify({
+          name: 'dasher',
+          version: '2.0.0',
+          description: 'The best library ever.',
+        }),
+      },
+      ipsum: {
+        'package.json': JSON.stringify({
+          name: 'sit',
+          version: '1.0.0',
+          keywords: ['lorem', 'ipsum', 'dolor'],
+          dependencies: {
+            'missing-dep': '^1.0.0',
+          },
+        }),
+      },
+      lorem: {
+        'package.json': JSON.stringify({
+          name: 'lorem',
+          version: '1.0.0',
+          keywords: ['lorem', 'ipsum', 'sit', 'amet'],
+          devDependencies: {
+            moo: '^3.0.0',
+          },
+          funding: [
+            { type: 'GitHub', url: 'https://github.com/sponsors' },
+          ],
+        }),
+      },
+      moo: {
+        'package.json': JSON.stringify({
+          name: 'moo',
+          version: '3.0.0',
+        }),
+      },
+      recur: {
+        'package.json': JSON.stringify({
+          name: 'recur',
+          version: '1.0.0',
+          dependencies: {
+            sive: '1.0.0',
+          },
+        }),
+      },
+      sive: {
+        'package.json': JSON.stringify({
+          name: 'sive',
+          version: '1.0.0',
+          dependencies: {
+            recur: '1.0.0',
+          },
+        }),
+      },
+    },
+    a: { 'package.json': JSON.stringify({
+      name: 'a',
+      version: '1.0.0',
+      optionalDependencies: {
+        baz: '^1.0.0',
+      },
+    }) },
+    b: { 'package.json': JSON.stringify({
+      name: 'b',
+      version: '1.0.0',
+      private: true,
+      devDependencies: {
+        a: '^1.0.0',
+      },
+      dependencies: {
+        bar: '^2.0.0',
+      },
+    }) },
+    'package.json': JSON.stringify({
+      name: 'query-selector-all-tests',
+      version: '1.0.0',
+      workspaces: ['a', 'b'],
+      dependencies: {
+        a: '^1.0.0',
+        abbrev: '^1.1.1',
+        bar: '^2.0.0',
+        ipsum: 'npm:sit@1.0.0',
+      },
+      devDependencies: {
+        foo: '^2.0.0',
+        moo: '^3.0.0',
+        recur: '1.0.0',
+      },
+      bundleDependencies: ['abbrev'],
+    }),
+  })
+
+  const opts = {
+    path,
+    fullMetadata: true,
+  }
+  const arb = new Arborist(opts)
+  const tree = await arb.loadActual(opts)
+
+  // empty query?
+  const emptyRes = await q(tree, '')
+  t.same(emptyRes, [], 'empty query')
+
+  // missing pseudo selector
+  t.rejects(
+    q(tree, ':foo'),
+    { code: 'EQUERYNOPSEUDO' },
+    'should throw on missing pseudo selector'
+  )
+
+  // missing depType
+  t.rejects(
+    q(tree, '.foo'),
+    { code: 'EQUERYNODEPTYPE' },
+    'should throw on missing dep type'
+  )
+
+  // missing attribute matcher on :attr
+  t.rejects(
+    q(tree, ':attr(foo, bar)'),
+    { code: 'EQUERYATTR' },
+    'should throw on missing attribute matcher on :attr pseudo'
+  )
+
+  // no type or tag selectors, as documented
+  t.rejects(
+    q(tree, 'node'),
+    { code: 'EQUERYNOSELECTOR' },
+    'should throw in invalid selector'
+  )
+
+  // :scope pseudo
+  const [nodeFoo] = await q(tree, '#foo')
+  const scopeRes = await querySelectorAll(nodeFoo, ':scope')
+  t.same(scopeRes, ['foo@2.2.2'], ':scope')
+
+  const scopeChildren = await querySelectorAll(nodeFoo, ':scope > *')
+  t.same(scopeChildren, [
+    'dash-separated-pkg@1.0.0',
+    'bar@1.4.0',
+  ], ':scope > *')
+
+  const runSpecParsing = async testCase => {
+    for (const [selector, expected] of testCase) {
+      t.test(selector, async t => {
+        const res = await querySelectorAll(tree, selector)
+        t.same(
+          res,
+          expected,
+          selector
+        )
+      })
+    }
+  }
+
+  await runSpecParsing([
+    // universal selector
+    ['*', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    ['* > *', [
+      'a@1.0.0',
+      'b@1.0.0',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    ['> #a', ['a@1.0.0']],
+
+    // pseudo :root
+    [':root', ['query-selector-all-tests@1.0.0']],
+    [':scope', ['query-selector-all-tests@1.0.0']], // same as root in this context
+    [':root > *', [
+      'a@1.0.0',
+      'b@1.0.0',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'foo@2.2.2',
+      'ipsum@npm:sit@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+    ]],
+    [':root > .workspace', ['a@1.0.0', 'b@1.0.0']],
+    [':root > *.workspace', ['a@1.0.0', 'b@1.0.0']],
+    [':root > .workspace[name=a]', ['a@1.0.0']],
+    [':root > [name=bar]', ['bar@2.0.0']],
+    [':root > .workspace[version=1.0.0]', ['a@1.0.0', 'b@1.0.0']],
+    [':root > .workspace[name=a][version=1.0.0]', ['a@1.0.0']],
+    [':root > :root', []],
+    ['* > :root', []],
+    ['* :root', []],
+    [':root, :root', ['query-selector-all-tests@1.0.0']],
+    ['#a *:root', []],
+    ['#a > :root', []],
+    ['#a ~ :root', []],
+
+    // pseudo miscelaneous
+    [':empty', [
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'a@1.0.0',
+      'abbrev@1.1.1',
+      'b@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+    ]],
+    [':root > :empty', [
+      'a@1.0.0',
+      'abbrev@1.1.1',
+      'b@1.0.0',
+      'moo@3.0.0',
+    ]],
+    [':extraneous', ['@npmcli/abbrev@2.0.0-beta.45']],
+    [':invalid', ['lorem@1.0.0']],
+    [':link', ['a@1.0.0', 'b@1.0.0']],
+    [':link', ['a@1.0.0', 'b@1.0.0']],
+    [':deduped', [
+      'bar@2.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+    ]],
+    [':missing', ['missing-dep@^1.0.0']],
+    [':private', ['b@1.0.0']],
+
+    // :not pseudo
+    [':not(#foo)', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    [':root > .workspace:not(#b)', ['a@1.0.0']],
+    [':root > .workspace > *:not(#bar)', ['a@1.0.0', 'baz@1.0.0']],
+    ['.bundled ~ :not(.workspace)', [
+      'bar@2.0.0',
+      'foo@2.2.2',
+      'ipsum@npm:sit@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+    ]],
+    ['*:root > *:empty:not(*[name^=a], #b)', ['moo@3.0.0']],
+    [':not(:not(:link))', [
+      'a@1.0.0',
+      'b@1.0.0',
+    ]],
+
+    // has pseudo
+    [':root > *:has(* > #bar@1.4.0)', ['foo@2.2.2']],
+    ['*:has(* > #bar@1.4.0)', ['foo@2.2.2']],
+    ['*:has(> #bar@1.4.0)', ['foo@2.2.2']],
+    ['.workspace:has(> * > #lorem)', ['a@1.0.0']],
+    ['.workspace:has(* #lorem, ~ #b)', ['a@1.0.0']],
+
+    // is pseudo
+    [':is(#a, #b) > *', ['a@1.0.0', 'bar@2.0.0', 'baz@1.0.0']],
+    // TODO: ipsum is not empty but its child is missing so it doesn't return a
+    // result here
+    [':root > *:is(.prod:not(:empty), .dev > [name=bar]) > *', [
+      'a@1.0.0',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dasher@2.0.0',
+      'moo@3.0.0',
+    ]],
+    [':is(*:semver(2.0.0), :semver(=2.0.0-beta.45))', [
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'bar@2.0.0',
+      'dasher@2.0.0',
+    ]],
+
+    // type pseudo
+    [':type()', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    [':type(tag)', ['lorem@1.0.0']],
+    [':type(alias)', ['ipsum@npm:sit@1.0.0']],
+    [':type(range)', [
+      'a@1.0.0',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'moo@3.0.0',
+    ]],
+    [':type(git)', []],
+
+    // path pseudo
+    [':path(node_modules/*)', [
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    [':path(node_modules/bar)', ['bar@2.0.0']],
+    [':path(./node_modules/bar)', ['bar@2.0.0']],
+    [':path(node_modules/foo/node_modules/bar)', ['bar@1.4.0']],
+    [':path(**/bar)', ['bar@2.0.0', 'bar@1.4.0']],
+    [':path(*)', ['a@1.0.0', 'b@1.0.0']],
+    [':path()', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+
+    // semver pseudo
+    [':semver()', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    [':semver(*)', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    [':semver(2.0.0)', [
+      'bar@2.0.0',
+      'dasher@2.0.0',
+    ]],
+    [':semver(>=2)', [
+      'bar@2.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'moo@3.0.0',
+    ]],
+    [':semver(~2.0.x)', [
+      'bar@2.0.0',
+      'dasher@2.0.0',
+    ]],
+    [':semver(2 - 3)', [
+      'bar@2.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'moo@3.0.0',
+    ]],
+    [':semver(=1.4.0)', ['bar@1.4.0']],
+    [':semver(1.4.0 || 2.2.2)', ['foo@2.2.2', 'bar@1.4.0']],
+
+    // attr pseudo
+    [':attr([name=dasher])', ['dasher@2.0.0']],
+    [':attr(dependencies, [bar="^1.0.0"])', ['foo@2.2.2']],
+    [':attr(dependencies, :attr([bar="^1.0.0"]))', ['foo@2.2.2']],
+    [':attr([keywords=lorem])', ['ipsum@npm:sit@1.0.0', 'lorem@1.0.0']],
+    [':attr(arbitrary, [foo$=oo])', ['bar@2.0.0']],
+    [':attr(arbitrary, [foo*=oo])', ['bar@2.0.0']],
+    [':attr(arbitrary, [foo|=oo])', []],
+    [':attr(funding, :attr([type=GitHub]))', ['lorem@1.0.0']],
+    [':attr(arbitrary, foo, :attr(funding, [type=GH]))', ['bar@2.0.0']],
+    [':attr(arbitrary, foo, :attr(funding, [type=gh i]))', ['bar@2.0.0']],
+    [':attr(arbitrary, :attr([foo=10000]))', ['bar@2.0.0']],
+
+    // attribute matchers
+    ['[name]', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    ['[name=a]', ['a@1.0.0']],
+    ['[name=@npmcli/abbrev]', ['@npmcli/abbrev@2.0.0-beta.45']],
+    ['[name=a], [name=b]', ['a@1.0.0', 'b@1.0.0']],
+    ['[name=a], *[name=b]', ['a@1.0.0', 'b@1.0.0']],
+    ['[name^=a]', ['a@1.0.0', 'abbrev@1.1.1']],
+    ['[name|=dash]', ['dash-separated-pkg@1.0.0']],
+    ['[name$=oo]', ['foo@2.2.2', 'moo@3.0.0']],
+    ['[description]', [
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+    ]],
+    ['[description~=ever]', ['dasher@2.0.0']],
+    ['[description~=best]', [
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+    ]],
+    ['[name*=a]', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'bar@1.4.0',
+    ]],
+    ['[arbitrary^=foo]', ['foo@2.2.2']],
+    ['[license=ISC]', ['abbrev@1.1.1', 'baz@1.0.0']],
+    ['[license=isc i]', ['abbrev@1.1.1', 'baz@1.0.0']],
+
+    // types
+    ['.prod', [
+      'query-selector-all-tests@1.0.0',
+      'a@1.0.0',
+      'b@1.0.0',
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'baz@1.0.0',
+      'ipsum@npm:sit@1.0.0',
+      'lorem@1.0.0',
+      'moo@3.0.0',
+    ]],
+    ['.workspace', ['a@1.0.0', 'b@1.0.0']],
+    ['.workspace > *', ['a@1.0.0', 'bar@2.0.0', 'baz@1.0.0']],
+    ['.workspace ~ *', [
+      'abbrev@1.1.1',
+      'bar@2.0.0',
+      'foo@2.2.2',
+      'ipsum@npm:sit@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+    ]],
+    ['.dev', [
+      '@npmcli/abbrev@2.0.0-beta.45',
+      'a@1.0.0',
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'foo@2.2.2',
+      'bar@1.4.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    ['.dev *', [
+      'dash-separated-pkg@1.0.0',
+      'dasher@2.0.0',
+      'bar@1.4.0',
+      'recur@1.0.0',
+      'sive@1.0.0',
+    ]],
+    ['.peer', ['@npmcli/abbrev@2.0.0-beta.45', 'dasher@2.0.0']],
+    ['.optional', ['@npmcli/abbrev@2.0.0-beta.45', 'baz@1.0.0', 'lorem@1.0.0']],
+    ['.bundled', ['abbrev@1.1.1']],
+    ['.bundled ~ *', [
+      'a@1.0.0',
+      'b@1.0.0',
+      'bar@2.0.0',
+      'foo@2.2.2',
+      'ipsum@npm:sit@1.0.0',
+      'moo@3.0.0',
+      'recur@1.0.0',
+    ]],
+
+    // id selector
+    ['#bar', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar@2.0.0', ['bar@2.0.0']],
+    ['#@npmcli/abbrev@2.0.0-beta.45', ['@npmcli/abbrev@2.0.0-beta.45']],
+    ['#bar:semver(2.0)', ['bar@2.0.0']],
+    ['#bar:semver(2)', ['bar@2.0.0']],
+    ['#bar:semver(^2.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(~2.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(=2.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(>=2.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(<3.0.0)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar:semver(2 - 3)', ['bar@2.0.0']],
+    ['#bar:semver(2.0.0 - 3.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(*)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar:semver(^2.0.0-beta.0)', ['bar@2.0.0']],
+    ['#bar:semver(>1.5.0 <3.0.0)', ['bar@2.0.0']],
+    ['#bar:semver(2.x)', ['bar@2.0.0']],
+    ['#bar:semver(2.x.x)', ['bar@2.0.0']],
+    ['#bar:semver(1||2)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar:semver(1 || 2)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar:semver(1 || 2.0.0)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#bar:semver(1.4.0 || 2)', ['bar@2.0.0', 'bar@1.4.0']],
+    ['#ipsum', ['ipsum@npm:sit@1.0.0']],
+    ['#bar > *', ['dasher@2.0.0', 'moo@3.0.0']],
+    [':root > #bar', ['bar@2.0.0']],
+    [':root > #bar > *', ['moo@3.0.0']],
+    [':root #bar > *', ['dasher@2.0.0', 'moo@3.0.0']],
+    [':root #bar:semver(1) > *', ['dasher@2.0.0']],
+    [':root #bar:semver(1) ~ *', ['dash-separated-pkg@1.0.0']],
+    ['#bar:semver(2), #foo', ['bar@2.0.0', 'foo@2.2.2']],
+    ['#a, #bar:semver(2), #foo@2.2.2', ['a@1.0.0', 'bar@2.0.0', 'foo@2.2.2']],
+  ])
+})