module: named exports for CJS via static analysis

PR-URL: https://github.com/nodejs/node/pull/35249
Reviewed-By: Mary Marchini <oss@mmarchini.me>
Reviewed-By: Geoffrey Booth <webmaster@geoffreybooth.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Zeyu Yang <himself65@outlook.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

5 files changed, 1545 insertions, 0 deletions

diff --git a/deps/cjs-module-lexer/.gitignore b/deps/cjs-module-lexer/.gitignore
new file mode 100755
index 00000000000..55ee2f0d6cf
--- /dev/null
+++ b/deps/cjs-module-lexer/.gitignore
@@ -0,0 +1,11 @@
+node_modules
+*.lock
+test
+.*
+Makefile
+bench
+build.js
+include-wasm
+include
+lib
+src
diff --git a/deps/cjs-module-lexer/LICENSE b/deps/cjs-module-lexer/LICENSE
new file mode 100755
index 00000000000..935b357962d
--- /dev/null
+++ b/deps/cjs-module-lexer/LICENSE
@@ -0,0 +1,10 @@
+MIT License
+-----------
+
+Copyright (C) 2018-2020 Guy Bedford
+
+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/deps/cjs-module-lexer/README.md b/deps/cjs-module-lexer/README.md
new file mode 100755
index 00000000000..726dd407769
--- /dev/null
+++ b/deps/cjs-module-lexer/README.md
@@ -0,0 +1,331 @@
+# CJS Module Lexer
+
+[![Build Status][travis-image]][travis-url]
+
+A [very fast](#benchmarks) JS CommonJS module syntax lexer used to detect the most likely list of named exports of a CommonJS module.
+
+Outputs the list of named exports (`exports.name = ...`) and possible module reexports (`module.exports = require('...')`), including the common transpiler variations of these cases.
+
+Forked from https://github.com/guybedford/es-module-lexer.
+
+_Comprehensively handles the JS language grammar while remaining small and fast. - ~90ms per MB of JS cold and ~15ms per MB of JS warm, [see benchmarks](#benchmarks) for more info._
+
+### Usage
+
+```
+npm install cjs-module-lexer
+```
+
+For use in CommonJS:
+
+```js
+const parse = require('cjs-module-lexer');
+
+const { exports, reexports } = parse(`
+  // named exports detection
+  module.exports.a = 'a';
+  (function () {
+    exports.b = 'b';
+  })();
+  Object.defineProperty(exports, 'c', { value: 'c' });
+  /* exports.d = 'not detected'; */
+
+  // reexports detection
+  if (maybe) module.exports = require('./dep1.js');
+  if (another) module.exports = require('./dep2.js');
+
+  // literal exports assignments
+  module.exports = { a, b: c, d, 'e': f }
+
+  // __esModule detection
+  Object.defineProperty(module.exports, '__esModule', { value: true })
+`);
+
+// exports === ['a', 'b', 'c', '__esModule']
+// reexports === ['./dep1.js', './dep2.js']
+```
+
+When using the ESM version, Wasm is supported instead:
+
+```js
+import { parse, init } from 'cjs-module-lexer';
+// init needs to be called and waited upon
+await init();
+const { exports, reexports } = parse(source);
+```
+
+The Wasm build is around 1.5x faster and without a cold start.
+
+### Grammar
+
+CommonJS exports matches are run against the source token stream.
+
+The token grammar is:
+
+```
+IDENTIFIER: As defined by ECMA-262, without support for identifier `\` escapes, filtered to remove strict reserved words:
+            "implements", "interface", "let", "package", "private", "protected", "public", "static", "yield", "enum"
+
+STRING_LITERAL: A `"` or `'` bounded ECMA-262 string literal.
+
+IDENTIFIER_STRING: ( `"` IDENTIFIER `"` | `'` IDENTIFIER `'` )
+
+COMMENT_SPACE: Any ECMA-262 whitespace, ECMA-262 block comment or ECMA-262 line comment
+
+MODULE_EXPORTS: `module` COMMENT_SPACE `.` COMMENT_SPACE `exports`
+
+EXPORTS_IDENTIFIER: MODULE_EXPORTS_IDENTIFIER | `exports`
+
+EXPORTS_DOT_ASSIGN: EXPORTS_IDENTIFIER COMMENT_SPACE `.` COMMENT_SPACE IDENTIFIER COMMENT_SPACE `=`
+
+EXPORTS_LITERAL_COMPUTED_ASSIGN: EXPORTS_IDENTIFIER COMMENT_SPACE `[` COMMENT_SPACE IDENTIFIER_STRING COMMENT_SPACE `]` COMMENT_SPACE `=`
+
+EXPORTS_LITERAL_PROP: (IDENTIFIER (COMMENT_SPACE `:` COMMENT_SPACE IDENTIFIER)?) | (IDENTIFIER_STRING COMMENT_SPACE `:` COMMENT_SPACE IDENTIFIER)
+
+EXPORTS_MEMBER: EXPORTS_DOT_ASSIGN | EXPORTS_LITERAL_COMPUTED_ASSIGN
+
+EXPORTS_DEFINE: `Object` COMMENT_SPACE `.` COMMENT_SPACE `defineProperty COMMENT_SPACE `(` EXPORTS_IDENTIFIER COMMENT_SPACE `,` COMMENT_SPACE IDENTIFIER_STRING
+
+EXPORTS_LITERAL: MODULE_EXPORTS COMMENT_SPACE `=` COMMENT_SPACE `{` COMMENT_SPACE (EXPORTS_LITERAL_PROP COMMENT_SPACE `,` COMMENT_SPACE)+ `}`
+
+REQUIRE: `require` COMMENT_SPACE `(` COMMENT_SPACE STRING_LITERAL COMMENT_SPACE `)`
+
+EXPORTS_ASSIGN: (`var` | `const` | `let`) IDENTIFIER `=` REQUIRE
+
+MODULE_EXPORTS_ASSIGN: MODULE_EXPORTS COMMENT_SPACE `=` COMMENT_SPACE REQUIRE
+
+EXPORT_STAR: (`__export` | `__exportStar`) `(` REQUIRE
+
+EXPORT_STAR_LIB: `Object.keys(` IDENTIFIER$1 `).forEach(function (` IDENTIFIER$2 `) {`
+  (
+    `if (` IDENTIFIER$2 `===` ( `'default'` | `"default"` ) `||` IDENTIFIER$2 `===` ( '__esModule' | `"__esModule"` ) `) return` `;`? |
+    `if (` IDENTIFIER$2 `!==` ( `'default'` | `"default"` ) `)`
+  )
+  (
+    EXPORTS_IDENTIFIER `[` IDENTIFIER$2 `] =` IDENTIFIER$1 `[` IDENTIFIER$2 `]` `;`? |
+    `Object.defineProperty(` EXPORTS_IDENTIFIER `, ` IDENTIFIER$2 `, { enumerable: true, get: function () { return ` IDENTIFIER$1 `[` IDENTIFIER$2 `]` `;`? } })` `;`?
+  )
+  `})`
+```
+
+* The returned export names are the matched `IDENTIFIER` and `IDENTIFIER_STRING` slots for all `EXPORTS_MEMBER`, `EXPORTS_DEFINE` and `EXPORTS_LITERAL` matches.
+* The reexport specifiers are taken to be the `STRING_LITERAL` slots of all `MODULE_EXPORTS_ASSIGN` as well as all _top-level_ `EXPORT_STAR` `REQUIRE` matches and `EXPORTS_ASSIGN` matches whose `IDENTIFIER` also matches the first `IDENTIFIER` in `EXPORT_STAR_LIB`.
+
+### Parsing Examples
+
+#### Named Exports Parsing
+
+The basic matching rules for named exports are `exports.name`, `exports['name']` or `Object.defineProperty(exports, 'name', ...)`. This matching is done without scope analysis and regardless of the expression position:
+
+```js
+// DETECTS EXPORTS: a, b, c
+(function (exports) {
+  exports.a = 'a'; 
+  exports['b'] = 'b';
+  Object.defineProperty(exports, 'c', { value: 'c' });
+})(exports);
+```
+
+Because there is no scope analysis, the above detection may overclassify:
+
+```js
+// DETECTS EXPORTS: a, b, c
+(function (exports, Object) {
+  exports.a = 'a';
+  exports['b'] = 'b';
+  if (false)
+    Object.defineProperty(exports, 'c', { value: 'c' });
+})(NOT_EXPORTS, NOT_OBJECT);
+```
+
+It will in turn underclassify in cases where the identifiers are renamed:
+
+```js
+// DETECTS: NO EXPORTS
+(function (e, defineProperty) {
+  e.a = 'a';
+  e['b'] = 'b';
+  defineProperty(e, 'c', { value: 'c' });
+})(exports, defineProperty);
+```
+
+#### Exports Object Assignment
+
+A best-effort is made to detect `module.exports` object assignments, but because this is not a full parser, arbitrary expressions are not handled in the
+object parsing process.
+
+Simple object definitions are supported:
+
+```js
+// DETECTS EXPORTS: a, b, c
+module.exports = {
+  a,
+  b: 'c',
+  c: c
+};
+```
+
+Object properties that are not identifiers or string expressions will bail out of the object detection:
+
+```js
+// DETECTS EXPORTS: a, b
+module.exports = {
+  a,
+  b: require('c'),
+  c: "not detected since require('c') above bails the object detection"
+}
+```
+
+`Object.defineProperties` is not currently supported either.
+
+#### module.exports reexport assignment
+
+Any `module.exports = require('mod')` assignment is detected as a reexport:
+
+```js
+// DETECTS REEXPORTS: a, b, c
+module.exports = require('a');
+(module => module.exports = require('b'))(NOT_MODULE);
+if (false) module.exports = require('c');
+```
+
+As a result, the total list of exports would be inferred as the union of all of these reexported modules, which can lead to possible over-classification.
+
+#### Transpiler Re-exports
+
+For named exports, transpiler output works well with the rules described above.
+
+But for star re-exports, special care is taken to support common patterns of transpiler outputs from Babel and TypeScript as well as bundlers like RollupJS.
+These reexport and star reexport patterns are restricted to only be detected at the top-level as provided by the direct output of these tools.
+
+For example, `export * from 'external'` is output by Babel as:
+
+```js
+"use strict";
+
+exports.__esModule = true;
+
+var _external = require("external");
+
+Object.keys(_external).forEach(function (key) {
+  if (key === "default" || key === "__esModule") return;
+  exports[key] = _external[key];
+});
+```
+
+Where the `var _external = require("external")` is specifically detected as well as the `Object.keys(_external)` statement, down to the exact
+for of that entire expression including minor variations of the output. The `_external` and `key` identifiers are carefully matched in this
+detection.
+
+Similarly for TypeScript, `export * from 'external'` is output as:
+
+```js
+"use strict";
+function __export(m) {
+    for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
+}
+Object.defineProperty(exports, "__esModule", { value: true });
+__export(require("external"));
+```
+
+Where the `__export(require("external"))` statement is explicitly detected as a reexport, including variations `tslib.__export` and `__exportStar`.
+
+### Environment Support
+
+Node.js 10+, and [all browsers with Web Assembly support](https://caniuse.com/#feat=wasm).
+
+### JS Grammar Support
+
+* Token state parses all line comments, block comments, strings, template strings, blocks, parens and punctuators.
+* Division operator / regex token ambiguity is handled via backtracking checks against punctuator prefixes, including closing brace or paren backtracking.
+* Always correctly parses valid JS source, but may parse invalid JS source without errors.
+
+### Benchmarks
+
+Benchmarks can be run with `npm run bench`.
+
+Current results:
+
+JS Build:
+
+```
+Module load time
+> 2ms
+Cold Run, All Samples
+test/samples/*.js (3635 KiB)
+> 333ms
+
+Warm Runs (average of 25 runs)
+test/samples/angular.js (1410 KiB)
+> 16.48ms
+test/samples/angular.min.js (303 KiB)
+> 5.36ms
+test/samples/d3.js (553 KiB)
+> 8.32ms
+test/samples/d3.min.js (250 KiB)
+> 4.28ms
+test/samples/magic-string.js (34 KiB)
+> 1ms
+test/samples/magic-string.min.js (20 KiB)
+> 0.36ms
+test/samples/rollup.js (698 KiB)
+> 10.48ms
+test/samples/rollup.min.js (367 KiB)
+> 6.64ms
+
+Warm Runs, All Samples (average of 25 runs)
+test/samples/*.js (3635 KiB)
+> 49.28ms
+```
+
+Wasm Build:
+```
+Module load time
+> 11ms
+Cold Run, All Samples
+test/samples/*.js (3635 KiB)
+> 48ms
+
+Warm Runs (average of 25 runs)
+test/samples/angular.js (1410 KiB)
+> 12.32ms
+test/samples/angular.min.js (303 KiB)
+> 3.76ms
+test/samples/d3.js (553 KiB)
+> 6.08ms
+test/samples/d3.min.js (250 KiB)
+> 3ms
+test/samples/magic-string.js (34 KiB)
+> 0.24ms
+test/samples/magic-string.min.js (20 KiB)
+> 0ms
+test/samples/rollup.js (698 KiB)
+> 7.2ms
+test/samples/rollup.min.js (367 KiB)
+> 4.2ms
+
+Warm Runs, All Samples (average of 25 runs)
+test/samples/*.js (3635 KiB)
+> 33.6ms
+```
+
+### Wasm Build Steps
+
+To build download the WASI SDK from https://github.com/CraneStation/wasi-sdk/releases.
+
+The Makefile assumes the existence of "wasi-sdk-10.0", "binaryen" and "wabt" (both optional) as sibling folders to this project.
+
+The build through the Makefile is then run via `make lib/lexer.wasm`, which can also be triggered via `npm run build-wasm` to create `dist/lexer.js`.
+
+On Windows it may be preferable to use the Linux subsystem.
+
+After the Web Assembly build, the CJS build can be triggered via `npm run build`.
+
+Optimization passes are run with [Binaryen](https://github.com/WebAssembly/binaryen) prior to publish to reduce the Web Assembly footprint.
+
+### License
+
+MIT
+
+[travis-url]: https://travis-ci.org/guybedford/es-module-lexer
+[travis-image]: https://travis-ci.org/guybedford/es-module-lexer.svg?branch=master
diff --git a/deps/cjs-module-lexer/lexer.js b/deps/cjs-module-lexer/lexer.js
new file mode 100755
index 00000000000..6a9eef9edd7
--- /dev/null
+++ b/deps/cjs-module-lexer/lexer.js
@@ -0,0 +1,1152 @@
+let source, pos, end;
+let openTokenDepth,
+  templateDepth,
+  lastTokenPos,
+  lastSlashWasDivision,
+  templateStack,
+  templateStackDepth,
+  openTokenPosStack,
+  openClassPosStack,
+  nextBraceIsClass,
+  starExportMap,
+  lastStarExportSpecifier,
+  _exports,
+  reexports;
+
+function resetState () {
+  openTokenDepth = 0;
+  templateDepth = -1;
+  lastTokenPos = -1;
+  lastSlashWasDivision = false;
+  templateStack = new Array(1024);
+  templateStackDepth = 0;
+  openTokenPosStack = new Array(1024);
+  openClassPosStack = new Array(1024);
+  nextBraceIsClass = false;
+  starExportMap = Object.create(null);
+  lastStarExportSpecifier = null;
+
+  _exports = new Set();
+  reexports = new Set();
+}
+
+const strictReserved = new Set(['implements', 'interface', 'let', 'package', 'private', 'protected', 'public', 'static', 'yield', 'enum']);
+
+module.exports = function parseCJS (source, name = '@') {
+  resetState();
+  try {
+    parseSource(source);
+  }
+  catch (e) {
+    e.message += `\n  at ${name}:${source.slice(0, pos).split('\n').length}:${pos - source.lastIndexOf('\n', pos - 1)}`;
+    e.loc = pos;
+    throw e;
+  }
+  const result = { exports: [..._exports], reexports: [...reexports] };
+  resetState();
+  return result;
+}
+
+function addExport (name) {
+  if (!strictReserved.has(name))
+    _exports.add(name);
+}
+
+function parseSource (cjsSource) {
+  source = cjsSource;
+  pos = -1;
+  end = source.length - 1;
+  let ch = 0;
+
+  // Handle #!
+  if (source.charCodeAt(0) === 35/*#*/ && source.charCodeAt(1) === 33/*!*/) {
+    if (source.length === 2)
+      return true;
+    pos += 2;
+    while (pos++ < end) {
+      ch = source.charCodeAt(pos);
+      if (ch === 10/*\n*/ || ch === 13/*\r*/)
+        break;
+    }
+  }
+
+  while (pos++ < end) {
+    ch = source.charCodeAt(pos);
+
+    if (ch === 32 || ch < 14 && ch > 8)
+      continue;
+
+    if (openTokenDepth === 0) {
+      switch (ch) {
+        case 105/*i*/:
+          if (source.slice(pos + 1, pos + 6) === 'mport' && keywordStart(pos))
+            throwIfImportStatement();
+          lastTokenPos = pos;
+          continue;
+        case 114/*r*/:
+          const startPos = pos;
+          if (tryParseRequire(false) && keywordStart(startPos))
+            tryBacktrackAddStarExportBinding(startPos - 1);
+          lastTokenPos = pos;
+          continue;
+        case 95/*_*/:
+          if (source.slice(pos + 1, pos + 8) === '_export' && (keywordStart(pos) || source.charCodeAt(pos - 1) === 46/*.*/)) {
+            pos += 8;
+            if (source.slice(pos, pos + 4) === 'Star')
+              pos += 4;
+            if (source.charCodeAt(pos) === 40/*(*/) {
+              openTokenPosStack[openTokenDepth++] = lastTokenPos;
+              if (source.charCodeAt(++pos) === 114/*r*/)
+                tryParseRequire(true);
+            }
+          }
+          lastTokenPos = pos;
+          continue;
+      }
+    }
+
+    switch (ch) {
+      case 101/*e*/:
+        if (source.slice(pos + 1, pos + 6) === 'xport' && keywordStart(pos)) {
+          if (source.charCodeAt(pos + 6) === 115/*s*/)
+            tryParseExportsDotAssign(false);
+          else if (openTokenDepth === 0)
+            throwIfExportStatement();
+        }
+        break;
+      case 99/*c*/:
+        if (keywordStart(pos) && source.slice(pos + 1, pos + 5) === 'lass' && isBrOrWs(source.charCodeAt(pos + 5)))
+          nextBraceIsClass = true;
+        break;
+      case 109/*m*/:
+        if (source.slice(pos + 1, pos + 6) === 'odule' && keywordStart(pos))
+          tryParseModuleExportsDotAssign();
+        break;
+      case 79/*O*/:
+        if (source.slice(pos + 1, pos + 6) === 'bject' && keywordStart(pos))
+          tryParseObjectDefineOrKeys(openTokenDepth === 0);
+        break;
+      case 40/*(*/:
+        openTokenPosStack[openTokenDepth++] = lastTokenPos;
+        break;
+      case 41/*)*/:
+        if (openTokenDepth === 0)
+          throw new Error('Unexpected closing bracket.');
+        openTokenDepth--;
+        break;
+      case 123/*{*/:
+        openClassPosStack[openTokenDepth] = nextBraceIsClass;
+        nextBraceIsClass = false;
+        openTokenPosStack[openTokenDepth++] = lastTokenPos;
+        break;
+      case 125/*}*/:
+        if (openTokenDepth === 0)
+          throw new Error('Unexpected closing brace.');
+        if (openTokenDepth-- === templateDepth) {
+          templateDepth = templateStack[--templateStackDepth];
+          templateString();
+        }
+        else {
+          if (templateDepth !== -1 && openTokenDepth < templateDepth)
+            throw new Error('Unexpected closing brace.');
+        }
+        break;
+      case 60/*>*/:
+        // TODO: <!-- XML comment support
+        break;
+      case 39/*'*/:
+        singleQuoteString();
+        break;
+      case 34/*"*/:
+        doubleQuoteString();
+        break;
+      case 47/*/*/: {
+        const next_ch = source.charCodeAt(pos + 1);
+        if (next_ch === 47/*/*/) {
+          lineComment();
+          // dont update lastToken
+          continue;
+        }
+        else if (next_ch === 42/***/) {
+          blockComment();
+          // dont update lastToken
+          continue;
+        }
+        else {
+          // Division / regex ambiguity handling based on checking backtrack analysis of:
+          // - what token came previously (lastToken)
+          // - if a closing brace or paren, what token came before the corresponding
+          //   opening brace or paren (lastOpenTokenIndex)
+          const lastToken = source.charCodeAt(lastTokenPos);
+          if (isExpressionPunctuator(lastToken) &&
+              !(lastToken === 46/*.*/ && (source.charCodeAt(lastTokenPos - 1) >= 48/*0*/ && source.charCodeAt(lastTokenPos - 1) <= 57/*9*/)) &&
+              !(lastToken === 43/*+*/ && source.charCodeAt(lastTokenPos - 1) === 43/*+*/) && !(lastToken === 45/*-*/ && source.charCodeAt(lastTokenPos - 1) === 45/*-*/) ||
+              lastToken === 41/*)*/ && isParenKeyword(openTokenPosStack[openTokenDepth]) ||
+              lastToken === 125/*}*/ && (isExpressionTerminator(openTokenPosStack[openTokenDepth]) || openClassPosStack[openTokenDepth]) ||
+              lastToken === 47/*/*/ && lastSlashWasDivision ||
+              isExpressionKeyword(lastTokenPos) ||
+              !lastToken) {
+            regularExpression();
+            lastSlashWasDivision = false;
+          }
+          else {
+            lastSlashWasDivision = true;
+          }
+        }
+        break;
+      }
+      case 96/*`*/:
+        templateString();
+        break;
+    }
+    lastTokenPos = pos;
+  }
+
+  if (templateDepth !== -1)
+    throw new Error('Unterminated template.');
+
+  if (openTokenDepth)
+    throw new Error('Unterminated braces.');
+}
+
+function tryBacktrackAddStarExportBinding (bPos) {
+  while (source.charCodeAt(bPos) === 32/* */ && bPos >= 0)
+    bPos--;
+  if (source.charCodeAt(bPos) === 61/*=*/) {
+    bPos--;
+    while (source.charCodeAt(bPos) === 32/* */ && bPos >= 0)
+      bPos--;
+    let codePoint;
+    const id_end = bPos;
+    let identifierStart = false;
+    while ((codePoint = codePointAtLast(bPos)) && bPos >= 0) {
+      if (codePoint === 92/*\*/)
+        return;
+      if (!isIdentifierChar(codePoint, true))
+        break;
+      identifierStart = isIdentifierStart(codePoint, true);
+      bPos -= codePointLen(codePoint);
+    }
+    if (identifierStart && source.charCodeAt(bPos) === 32/* */) {
+      const starExportId = source.slice(bPos + 1, id_end + 1);
+      while (source.charCodeAt(bPos) === 32/* */ && bPos >= 0)
+        bPos--;
+      switch (source.charCodeAt(bPos)) {
+        case 114/*r*/:
+          if (source.slice(bPos - 2, bPos) !== 'va')
+            return;
+          break;
+        case 116/*t*/:
+          if (source.slice(bPos - 2, bPos) !== 'le' && source.slice(bPos - 4, bPos) !== 'cons')
+            return;
+          break;
+        default: return;
+      }
+      starExportMap[starExportId] = lastStarExportSpecifier;
+    }
+  }
+}
+
+function tryParseObjectDefineOrKeys (keys) {
+  pos += 6;
+  let revertPos = pos - 1;
+  let ch = commentWhitespace();
+  if (ch === 46/*.*/) {
+    pos++;
+    ch = commentWhitespace();
+    if (ch === 100/*d*/ && source.slice(pos + 1, pos + 14) === 'efineProperty') {
+      pos += 14;
+      revertPos = pos - 1;
+      ch = commentWhitespace();
+      if (ch !== 40/*(*/) {
+        pos = revertPos;
+        return;
+      }
+      pos++;
+      ch = commentWhitespace();
+      if (readExportsOrModuleDotExports(ch)) {
+        ch = commentWhitespace();
+        if (ch === 44/*,*/) {
+          pos++;
+          ch = commentWhitespace();
+          if (ch === 39/*'*/ || ch === 34/*"*/) {
+            const exportPos = ++pos;
+            if (identifier() && source.charCodeAt(pos) === ch) {
+              // revert for "("
+              addExport(source.slice(exportPos, pos));
+            }
+          }
+        }
+      }
+    }
+    else if (keys && ch === 107/*k*/ && source.slice(pos + 1, pos + 4) === 'eys') {
+      while (true) {
+        pos += 4;
+        revertPos = pos - 1;
+        ch = commentWhitespace();
+        if (ch !== 40/*(*/) break;
+        pos++;
+        ch = commentWhitespace();
+        const id_start = pos;
+        if (!identifier()) break;
+        const id = source.slice(id_start, pos);
+        ch = commentWhitespace();
+        if (ch !== 41/*)*/) break;
+
+        revertPos = pos++;
+        ch = commentWhitespace();
+        if (ch !== 46/*.*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (ch !== 102/*f*/ || source.slice(pos + 1, pos + 7) !== 'orEach') break;
+        pos += 7;
+        ch = commentWhitespace();
+        revertPos = pos - 1;
+        if (ch !== 40/*(*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (ch !== 102/*f*/ || source.slice(pos + 1, pos + 8) !== 'unction') break;
+        pos += 8;
+        ch = commentWhitespace();
+        if (ch !== 40/*(*/) break;
+        pos++;
+        ch = commentWhitespace();
+        const it_id_start = pos;
+        if (!identifier()) break;
+        const it_id = source.slice(it_id_start, pos);
+        ch = commentWhitespace();
+        if (ch !== 41/*)*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (ch !== 123/*{*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (ch !== 105/*i*/ || source.slice(pos + 1, pos + 3) !== 'f ') break;
+        pos += 3;
+        ch = commentWhitespace();
+        if (ch !== 40/*(*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (it_id !== source.slice(pos, pos + it_id.length)) break;
+        pos += it_id.length;
+        ch = commentWhitespace();
+        // `if (` IDENTIFIER$2 `===` ( `'default'` | `"default"` ) `||` IDENTIFIER$2 `===` ( '__esModule' | `"__esModule"` ) `) return` `;`? |
+        if (ch === 61/*=*/) {
+          if (source.slice(pos + 1, pos + 3) !== '==') break;
+          pos += 3;
+          ch = commentWhitespace();
+          if (ch !== 34/*"*/ && ch !== 39/*'*/) break;
+          let quot = ch;
+          if (source.slice(pos + 1, pos + 8) !== 'default') break;
+          pos += 8;
+          ch = commentWhitespace();
+          if (ch !== quot) break;
+          pos += 1;
+          ch = commentWhitespace();
+          if (ch !== 124/*|*/ || source.charCodeAt(pos + 1) !== 124/*|*/) break;
+          pos += 2;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + it_id.length) !== it_id) break;
+          pos += it_id.length;
+          ch = commentWhitespace();
+          if (ch !== 61/*=*/ || source.slice(pos + 1, pos + 3) !== '==') break;
+          pos += 3;
+          ch = commentWhitespace();
+          if (ch !== 34/*"*/ && ch !== 39/*'*/) break;
+          quot = ch;
+          if (source.slice(pos + 1, pos + 11) !== '__esModule') break;
+          pos += 11;
+          ch = commentWhitespace();
+          if (ch !== quot) break;
+          pos += 1;
+          ch = commentWhitespace();
+          if (ch !== 41/*)*/) break;
+          pos += 1;
+          ch = commentWhitespace();
+          if (ch !== 114/*r*/ || source.slice(pos + 1, pos + 6) !== 'eturn') break;
+          pos += 6;
+          ch = commentWhitespace();
+          if (ch === 59/*;*/)
+            pos++;
+          ch = commentWhitespace();
+        }
+        // `if (` IDENTIFIER$2 `!==` ( `'default'` | `"default"` ) `)`
+        else if (ch === 33/*!*/) {
+          if (source.slice(pos + 1, pos + 3) !== '==') break;
+          pos += 3;
+          ch = commentWhitespace();
+          if (ch !== 34/*"*/ && ch !== 39/*'*/) break;
+          const quot = ch;
+          if (source.slice(pos + 1, pos + 8) !== 'default') break;
+          pos += 8;
+          ch = commentWhitespace();
+          if (ch !== quot) break;
+          pos += 1;
+          ch = commentWhitespace();
+          if (ch !== 41/*)*/) break;
+          pos += 1;
+          ch = commentWhitespace();
+        }
+        else break;
+
+        // EXPORTS_IDENTIFIER `[` IDENTIFIER$2 `] =` IDENTIFIER$1 `[` IDENTIFIER$2 `]`
+        if (readExportsOrModuleDotExports(ch)) {
+          ch = commentWhitespace();
+          if (ch !== 91/*[*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + it_id.length) !== it_id) break;
+          pos += it_id.length;
+          ch = commentWhitespace();
+          if (ch !== 93/*]*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 61/*=*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + id.length) !== id) break;
+          pos += id.length;
+          ch = commentWhitespace();
+          if (ch !== 91/*[*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + it_id.length) !== it_id) break;
+          pos += it_id.length;
+          ch = commentWhitespace();
+          if (ch !== 93/*]*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch === 59/*;*/) {
+            pos++;
+            ch = commentWhitespace();
+          }
+        }
+        // `Object.defineProperty(` EXPORTS_IDENTIFIER `, ` IDENTIFIER$2 `, { enumerable: true, get: function () { return ` IDENTIFIER$1 `[` IDENTIFIER$2 `]; } })`
+        else if (ch === 79/*O*/) {
+          if (source.slice(pos + 1, pos + 6) !== 'bject') break;
+          pos += 6;
+          ch = commentWhitespace();
+          if (ch !== 46/*.*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 100/*d*/ || source.slice(pos + 1, pos + 14) !== 'efineProperty') break;
+          pos += 14;
+          ch = commentWhitespace();
+          if (ch !== 40/*(*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (!readExportsOrModuleDotExports(ch)) break;
+          ch = commentWhitespace();
+          if (ch !== 44/*,*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + it_id.length) !== it_id) break;
+          pos += it_id.length;
+          ch = commentWhitespace();
+          if (ch !== 44/*,*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 123/*{*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 101/*e*/ || source.slice(pos + 1, pos + 10) !== 'numerable') break;
+          pos += 10;
+          ch = commentWhitespace();
+          if (ch !== 58/*:*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 116/*t*/ && source.slice(pos + 1, pos + 4) !== 'rue') break;
+          pos += 4;
+          ch = commentWhitespace();
+          if (ch !== 44/*,*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 103/*g*/ || source.slice(pos + 1, pos + 3) !== 'et') break;
+          pos += 3;
+          ch = commentWhitespace();
+          if (ch !== 58/*:*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 102/*f*/ || source.slice(pos + 1, pos + 8) !== 'unction') break;
+          pos += 8;
+          ch = commentWhitespace();
+          if (ch !== 40/*(*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 41/*)*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 123/*{*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 114/*r*/ || source.slice(pos + 1, pos + 6) !== 'eturn') break;
+          pos += 6;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + id.length) !== id) break;
+          pos += id.length;
+          ch = commentWhitespace();
+          if (ch !== 91/*[*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (source.slice(pos, pos + it_id.length) !== it_id) break;
+          pos += it_id.length;
+          ch = commentWhitespace();
+          if (ch !== 93/*]*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch === 59/*;*/) {
+            pos++;
+            ch = commentWhitespace();
+          }
+          if (ch !== 125/*}*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 125/*}*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 41/*)*/) break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch === 59/*;*/) {
+            pos++;
+            ch = commentWhitespace();
+          }
+        }
+        else break;
+
+        if (ch !== 125/*}*/) break;
+        pos++;
+        ch = commentWhitespace();
+        if (ch !== 41/*)*/) break;
+
+        const starExportSpecifier = starExportMap[id];
+        if (starExportSpecifier) {
+          reexports.add(starExportSpecifier);
+          pos = revertPos;
+          return;
+        }
+        return;
+      }
+    }
+  }
+  pos = revertPos;
+}
+
+function readExportsOrModuleDotExports (ch) {
+  const revertPos = pos;
+  if (ch === 109/*m*/ && source.slice(pos + 1, pos + 6) === 'odule') {
+    pos += 6;
+    ch = commentWhitespace();
+    if (ch !== 46/*.*/) {
+      pos = revertPos;
+      return false;
+    }
+    pos++;
+    ch = commentWhitespace();
+  }
+  if (ch === 101/*e*/ && source.slice(pos + 1, pos + 7) === 'xports') {
+    pos += 7;
+    return true;
+  }
+  else {
+    pos = revertPos;
+    return false;
+  }
+}
+
+function tryParseModuleExportsDotAssign () {
+  pos += 6;
+  const revertPos = pos - 1;
+  let ch = commentWhitespace();
+  if (ch === 46/*.*/) {
+    pos++;
+    ch = commentWhitespace();
+    if (ch === 101/*e*/ && source.slice(pos + 1, pos + 7) === 'xports') {
+      tryParseExportsDotAssign(true);
+      return;
+    }
+  }
+  pos = revertPos;
+}
+
+function tryParseExportsDotAssign (assign) {
+  pos += 7;
+  const revertPos = pos - 1;
+  let ch = commentWhitespace();
+  switch (ch) {
+    // exports.asdf
+    case 46/*.*/: {
+      pos++;
+      ch = commentWhitespace();
+      const startPos = pos;
+      if (identifier()) {
+        const endPos = pos;
+        ch = commentWhitespace();
+        if (ch === 61/*=*/) {
+          addExport(source.slice(startPos, endPos));
+          return;
+        }
+      }
+      break;
+    }
+    // exports['asdf']
+    case 91/*[*/: {
+      pos++;
+      ch = commentWhitespace();
+      if (ch === 39/*'*/ || ch === 34/*"*/) {
+        pos++;
+        const startPos = pos;
+        if (identifier() && source.charCodeAt(pos) === ch) {
+          const endPos = pos++;
+          ch = commentWhitespace();
+          if (ch !== 93/*]*/)
+            break;
+          pos++;
+          ch = commentWhitespace();
+          if (ch !== 61/*=*/)
+            break;
+          addExport(source.slice(startPos, endPos));
+        }
+      }
+      break;
+    }
+    // module.exports =
+    case 61/*=*/: {
+      if (assign) {
+        pos++;
+        ch = commentWhitespace();
+        // { ... }
+        if (ch === 123/*{*/) {
+          tryParseLiteralExports();
+          return;
+        }
+
+        // require('...')
+        if (ch === 114/*r*/)
+          tryParseRequire(true);
+      }
+    }
+  }
+  pos = revertPos;
+}
+
+function tryParseRequire (directStarExport) {
+  // require('...')
+  if (source.slice(pos + 1, pos + 7) === 'equire') {
+    pos += 7;
+    const revertPos = pos - 1;
+    let ch = commentWhitespace();
+    if (ch === 40/*(*/) {
+      pos++;
+      ch = commentWhitespace();
+      const reexportStart = pos + 1;
+      if (ch === 39/*'*/) {
+        singleQuoteString();
+        const reexportEnd = pos++;
+        ch = commentWhitespace();
+        if (ch === 41/*)*/) {
+          if (directStarExport) {
+            reexports.add(source.slice(reexportStart, reexportEnd));
+          }
+          else {
+            lastStarExportSpecifier = source.slice(reexportStart, reexportEnd);
+          }
+          return true;
+        }
+      }
+      else if (ch === 34/*"*/) {
+        doubleQuoteString();
+        const reexportEnd = pos++;
+        ch = commentWhitespace();
+        if (ch === 41/*)*/) {
+          if (directStarExport) {
+            reexports.add(source.slice(reexportStart, reexportEnd));
+          }
+          else {
+            lastStarExportSpecifier = source.slice(reexportStart, reexportEnd);
+          }
+          return true;
+        }
+      }
+    }
+    pos = revertPos;
+  }
+  return false;
+}
+
+function tryParseLiteralExports () {
+  const revertPos = pos - 1;
+  while (pos++ < end) {
+    let ch = commentWhitespace();
+    const startPos = pos;
+    if (identifier()) {
+      const endPos = pos;
+      ch = commentWhitespace();
+      if (ch === 58/*:*/) {
+        pos++;
+        ch = commentWhitespace();
+        // nothing more complex than identifier expressions for now
+        if (!identifier()) {
+          pos = revertPos;
+          return;
+        }
+        ch = source.charCodeAt(pos);
+      }
+      addExport(source.slice(startPos, endPos));
+    }
+    else if (ch === 39/*'*/ || ch === 34/*"*/) {
+      const startPos = ++pos;
+      if (identifier() && source.charCodeAt(pos) === ch) {
+        const endPos = pos++;
+        ch = commentWhitespace();
+        if (ch === 58/*:*/) {
+          pos++;
+          ch = commentWhitespace();
+          // nothing more complex than identifier expressions for now
+          if (!identifier()) {
+            pos = revertPos;
+            return;
+          }
+          ch = source.charCodeAt(pos);
+          addExport(source.slice(startPos, endPos));
+        }
+      }
+    }
+    else {
+      pos = revertPos;
+      return;
+    }
+
+    if (ch === 125/*}*/)
+      return;
+
+    if (ch !== 44/*,*/) {
+      pos = revertPos;
+      return;
+    }
+  }
+}
+
+// --- Extracted from AcornJS ---
+//(https://github.com/acornjs/acorn/blob/master/acorn/src/identifier.js#L23
+// 
+// MIT License
+
+// Copyright (C) 2012-2018 by various contributors (see AUTHORS)
+
+// 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.
+
+// ## Character categories
+
+// Big ugly regular expressions that match characters in the
+// whitespace, identifier, and identifier-start categories. These
+// are only applied when a character is found to actually have a
+// code point above 128.
+// Generated by `bin/generate-identifier-regex.js`.
+let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08c7\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\u9ffc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7ca\ua7f5-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
+let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf\u1ac0\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
+
+const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
+const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
+
+nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
+
+// These are a run-length and offset encoded representation of the
+// >0xffff code points that are a valid part of identifiers. The
+// offset starts at 0x10000, and each pair of numbers represents an
+// offset to the next range, and then a size of the range. They were
+// generated by bin/generate-identifier-regex.js
+
+// eslint-disable-next-line comma-spacing
+const astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,349,41,7,1,79,28,11,0,9,21,107,20,28,22,13,52,76,44,33,24,27,35,30,0,3,0,9,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,21,2,31,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,14,0,72,26,230,43,117,63,32,7,3,0,3,7,2,1,2,23,16,0,2,0,95,7,3,38,17,0,2,0,29,0,11,39,8,0,22,0,12,45,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,190,0,80,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,74,6,0,67,12,65,1,2,0,29,6135,9,1237,43,8,8952,286,50,2,18,3,9,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,2357,44,11,6,17,0,370,43,1301,196,60,67,8,0,1205,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42717,35,4148,12,221,3,5761,15,7472,3104,541,1507,4938]
+
+// eslint-disable-next-line comma-spacing
+const astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,370,1,154,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,2,11,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,71,5,2,1,3,3,2,0,2,1,13,9,120,6,3,6,4,0,29,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1014,0,2,54,8,3,82,0,12,1,19628,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,262,6,10,9,419,13,1495,6,110,6,6,9,4759,9,787719,239]
+
+// This has a complexity linear to the value of the code. The
+// assumption is that looking up astral identifier characters is
+// rare.
+function isInAstralSet(code, set) {
+  let pos = 0x10000
+  for (let i = 0; i < set.length; i += 2) {
+    pos += set[i]
+    if (pos > code) return false
+    pos += set[i + 1]
+    if (pos >= code) return true
+  }
+}
+
+// Test whether a given character code starts an identifier.
+
+function isIdentifierStart(code, astral) {
+  if (code < 65) return code === 36
+  if (code < 91) return true
+  if (code < 97) return code === 95
+  if (code < 123) return true
+  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code))
+  if (astral === false) return false
+  return isInAstralSet(code, astralIdentifierStartCodes)
+}
+
+// Test whether a given character is part of an identifier.
+
+function isIdentifierChar(code, astral) {
+  if (code < 48) return code === 36
+  if (code < 58) return true
+  if (code < 65) return false
+  if (code < 91) return true
+  if (code < 97) return code === 95
+  if (code < 123) return true
+  if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code))
+  if (astral === false) return false
+  return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
+}
+
+function identifier () {
+  let ch = source.codePointAt(pos);
+  if (!isIdentifierStart(ch, true) || ch === '\\')
+    return false;
+  pos += codePointLen(ch);
+  while (ch = source.codePointAt(pos)) {
+    if (isIdentifierChar(ch, true)) {
+      pos += codePointLen(ch);
+    }
+    else if (ch === '\\') {
+      // no identifier escapes support for now
+      return false;
+    }
+    else {
+      break;
+    }
+  }
+  return true;
+}
+
+function codePointLen (ch) {
+  if (ch < 0x10000) return 1;
+  return 2;
+}
+
+function codePointAtLast (bPos) {
+  // Gives the UTF char for backtracking surrogates
+  const ch = source.charCodeAt(bPos);
+  if ((ch & 0xFC00) === 0xDC00)
+    return (((source.charCodeAt(bPos - 1) & 0x3FF) << 10) | (ch & 0x3FF)) + 0x10000;
+  return ch;
+}
+
+function throwIfImportStatement () {
+  const startPos = pos;
+  pos += 6;
+  const ch = commentWhitespace();
+  switch (ch) {
+    // dynamic import
+    case 40/*(*/:
+      openTokenPosStack[openTokenDepth++] = startPos;
+      return;
+    // import.meta
+    case 46/*.*/:
+      throw new Error('Unexpected import.meta in CJS module.');
+      return;
+    
+    default:
+      // no space after "import" -> not an import keyword
+      if (pos === startPos + 6)
+        break;
+    case 34/*"*/:
+    case 39/*'*/:
+    case 123/*{*/:
+    case 42/***/:
+      // import statement only permitted at base-level
+      if (openTokenDepth !== 0) {
+        pos--;
+        return;
+      }
+      // import statements are a syntax error in CommonJS
+      throw new Error('Unexpected import statement in CJS module.');
+  }
+}
+
+function throwIfExportStatement () {
+  pos += 6;
+  const curPos = pos;
+  const ch = commentWhitespace();
+  if (pos === curPos && !isPunctuator(ch))
+    return;
+  throw new Error('Unexpected export statement in CJS module.');
+}
+
+function commentWhitespace () {
+  let ch;
+  do {
+    ch = source.charCodeAt(pos);
+    if (ch === 47/*/*/) {
+      const next_ch = source.charCodeAt(pos + 1);
+      if (next_ch === 47/*/*/)
+        lineComment();
+      else if (next_ch === 42/***/)
+        blockComment();
+      else
+        return ch;
+    }
+    else if (!isBrOrWs(ch)) {
+      return ch;
+    }
+  } while (pos++ < end);
+  return ch;
+}
+
+function templateString () {
+  while (pos++ < end) {
+    const ch = source.charCodeAt(pos);
+    if (ch === 36/*$*/ && source.charCodeAt(pos + 1) === 123/*{*/) {
+      pos++;
+      templateStack[templateStackDepth++] = templateDepth;
+      templateDepth = ++openTokenDepth;
+      return;
+    }
+    if (ch === 96/*`*/)
+      return;
+    if (ch === 92/*\*/)
+      pos++;
+  }
+  syntaxError();
+}
+
+function blockComment () {
+  pos++;
+  while (pos++ < end) {
+    const ch = source.charCodeAt(pos);
+    if (ch === 42/***/ && source.charCodeAt(pos + 1) === 47/*/*/) {
+      pos++;
+      return;
+    }
+  }
+}
+
+function lineComment () {
+  while (pos++ < end) {
+    const ch = source.charCodeAt(pos);
+    if (ch === 10/*\n*/ || ch === 13/*\r*/)
+      return;
+  }
+}
+
+function singleQuoteString () {
+  while (pos++ < end) {
+    let ch = source.charCodeAt(pos);
+    if (ch === 39/*'*/)
+      return;
+    if (ch === 92/*\*/) {
+      ch = source.charCodeAt(++pos);
+      if (ch === 13/*\r*/ && source.charCodeAt(pos + 1) === 10/*\n*/)
+        pos++;
+    }
+    else if (isBr(ch))
+      break;
+  }
+  throw new Error('Unterminated string.');
+}
+
+function doubleQuoteString () {
+  while (pos++ < end) {
+    let ch = source.charCodeAt(pos);
+    if (ch === 34/*"*/)
+      return;
+    if (ch === 92/*\*/) {
+      ch = source.charCodeAt(++pos);
+      if (ch === 13/*\r*/ && source.charCodeAt(pos + 1) === 10/*\n*/)
+        pos++;
+    }
+    else if (isBr(ch))
+      break;
+  }
+  throw new Error('Unterminated string.');
+}
+
+function regexCharacterClass () {
+  while (pos++ < end) {
+    let ch = source.charCodeAt(pos);
+    if (ch === 93/*]*/)
+      return ch;
+    if (ch === 92/*\*/)
+      pos++;
+    else if (ch === 10/*\n*/ || ch === 13/*\r*/)
+      break;
+  }
+  throw new Error('Syntax error reading regular expression class.');
+}
+
+function regularExpression () {
+  while (pos++ < end) {
+    let ch = source.charCodeAt(pos);
+    if (ch === 47/*/*/)
+      return;
+    if (ch === 91/*[*/)
+      ch = regexCharacterClass();
+    else if (ch === 92/*\*/)
+      pos++;
+    else if (ch === 10/*\n*/ || ch === 13/*\r*/)
+      break;
+  }
+  throw new Error('Syntax error reading regular expression.');
+}
+
+// Note: non-asii BR and whitespace checks omitted for perf / footprint
+// if there is a significant user need this can be reconsidered
+function isBr (c) {
+  return c === 13/*\r*/ || c === 10/*\n*/;
+}
+
+function isBrOrWs (c) {
+  return c > 8 && c < 14 || c === 32 || c === 160;
+}
+
+function isBrOrWsOrPunctuatorNotDot (c) {
+  return c > 8 && c < 14 || c === 32 || c === 160 || isPunctuator(c) && c !== 46/*.*/;
+}
+
+function keywordStart (pos) {
+  return pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1));
+}
+
+function readPrecedingKeyword (pos, match) {
+  if (pos < match.length - 1)
+    return false;
+  return source.slice(pos - match.length + 1, pos + 1) === match && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - match.length)));
+}
+
+function readPrecedingKeyword1 (pos, ch) {
+  return source.charCodeAt(pos) === ch && (pos === 0 || isBrOrWsOrPunctuatorNotDot(source.charCodeAt(pos - 1)));  
+}
+
+// Detects one of case, debugger, delete, do, else, in, instanceof, new,
+//   return, throw, typeof, void, yield, await
+function isExpressionKeyword (pos) {
+  switch (source.charCodeAt(pos)) {
+    case 100/*d*/:
+      switch (source.charCodeAt(pos - 1)) {
+        case 105/*i*/:
+          // void
+          return readPrecedingKeyword(pos - 2, 'vo');
+        case 108/*l*/:
+          // yield
+          return readPrecedingKeyword(pos - 2, 'yie');
+        default:
+          return false;
+      }
+    case 101/*e*/:
+      switch (source.charCodeAt(pos - 1)) {
+        case 115/*s*/:
+          switch (source.charCodeAt(pos - 2)) {
+            case 108/*l*/:
+              // else
+              return readPrecedingKeyword1(pos - 3, 101/*e*/);
+            case 97/*a*/:
+              // case
+              return readPrecedingKeyword1(pos - 3, 99/*c*/);
+            default:
+              return false;
+          }
+        case 116/*t*/:
+          // delete
+          return readPrecedingKeyword(pos - 2, 'dele');
+        default:
+          return false;
+      }
+    case 102/*f*/:
+      if (source.charCodeAt(pos - 1) !== 111/*o*/ || source.charCodeAt(pos - 2) !== 101/*e*/)
+        return false;
+      switch (source.charCodeAt(pos - 3)) {
+        case 99/*c*/:
+          // instanceof
+          return readPrecedingKeyword(pos - 4, 'instan');
+        case 112/*p*/:
+          // typeof
+          return readPrecedingKeyword(pos - 4, 'ty');
+        default:
+          return false;
+      }
+    case 110/*n*/:
+      // in, return
+      return readPrecedingKeyword1(pos - 1, 105/*i*/) || readPrecedingKeyword(pos - 1, 'retur');
+    case 111/*o*/:
+      // do
+      return readPrecedingKeyword1(pos - 1, 100/*d*/);
+    case 114/*r*/:
+      // debugger
+      return readPrecedingKeyword(pos - 1, 'debugge');
+    case 116/*t*/:
+      // await
+      return readPrecedingKeyword(pos - 1, 'awai');
+    case 119/*w*/:
+      switch (source.charCodeAt(pos - 1)) {
+        case 101/*e*/:
+          // new
+          return readPrecedingKeyword1(pos - 2, 110/*n*/);
+        case 111/*o*/:
+          // throw
+          return readPrecedingKeyword(pos - 2, 'thr');
+        default:
+          return false; 
+      }
+  }
+  return false;
+}
+
+function isParenKeyword (curPos) {
+  return source.charCodeAt(curPos) === 101/*e*/ && source.slice(curPos - 4, curPos) === 'whil' ||
+      source.charCodeAt(curPos) === 114/*r*/ && source.slice(curPos - 2, curPos) === 'fo' ||
+      source.charCodeAt(curPos - 1) === 105/*i*/ && source.charCodeAt(curPos) === 102/*f*/;
+}
+
+function isPunctuator (ch) {
+  // 23 possible punctuator endings: !%&()*+,-./:;<=>?[]^{}|~
+  return ch === 33/*!*/ || ch === 37/*%*/ || ch === 38/*&*/ ||
+    ch > 39 && ch < 48 || ch > 57 && ch < 64 ||
+    ch === 91/*[*/ || ch === 93/*]*/ || ch === 94/*^*/ ||
+    ch > 122 && ch < 127;
+}
+
+function isExpressionPunctuator (ch) {
+  // 20 possible expression endings: !%&(*+,-.:;<=>?[^{|~
+  return ch === 33/*!*/ || ch === 37/*%*/ || ch === 38/*&*/ ||
+    ch > 39 && ch < 47 && ch !== 41 || ch > 57 && ch < 64 ||
+    ch === 91/*[*/ || ch === 94/*^*/ || ch > 122 && ch < 127 && ch !== 125/*}*/;
+}
+
+function isExpressionTerminator (curPos) {
+  // detects:
+  // => ; ) finally catch else
+  // as all of these followed by a { will indicate a statement brace
+  switch (source.charCodeAt(curPos)) {
+    case 62/*>*/:
+      return source.charCodeAt(curPos - 1) === 61/*=*/;
+    case 59/*;*/:
+    case 41/*)*/:
+      return true;
+    case 104/*h*/:
+      return source.slice(curPos - 4, curPos) === 'catc';
+    case 121/*y*/:
+      return source.slice(curPos - 6, curPos) === 'finall';
+    case 101/*e*/:
+      return source.slice(curPos - 3, curPos) === 'els';
+  }
+  return false;
+}
diff --git a/deps/cjs-module-lexer/package.json b/deps/cjs-module-lexer/package.json
new file mode 100755
index 00000000000..3f411a29dd3
--- /dev/null
+++ b/deps/cjs-module-lexer/package.json
@@ -0,0 +1,41 @@
+{
+  "name": "cjs-module-lexer",
+  "version": "0.3.3",
+  "description": "Lexes CommonJS modules, returning their named exports metadata",
+  "main": "lexer.js",
+  "exports": {
+    "import": "./dist/lexer.mjs",
+    "default": "./lexer.js"
+  },
+  "scripts": {
+    "test-js": "mocha -b -u tdd test/*.js",
+    "test-wasm": "WASM=1 mocha -b -u tdd test/*.js",
+    "test": "npm run test-wasm && npm run test-js",
+    "bench": "node --expose-gc bench/index.mjs",
+    "build": "node build.js && babel dist/lexer.mjs | terser -o dist/lexer.js",
+    "build-wasm": "make lib/lexer.wasm && node build.js",
+    "prepublishOnly": "make optimize && npm run build",
+    "footprint": "make optimize && npm run build && cat dist/lexer.js | gzip -9f | wc -c"
+  },
+  "author": "Guy Bedford",
+  "license": "MIT",
+  "devDependencies": {
+    "@babel/cli": "^7.5.5",
+    "@babel/core": "^7.5.5",
+    "@babel/plugin-transform-modules-commonjs": "^7.5.0",
+    "kleur": "^2.0.2",
+    "mocha": "^5.2.0",
+    "terser": "^4.1.4"
+  },
+  "files": [
+    "dist"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/guybedford/cjs-module-lexer.git"
+  },
+  "bugs": {
+    "url": "https://github.com/guybedford/cjs-module-lexer/issues"
+  },
+  "homepage": "https://github.com/guybedford/cjs-module-lexer#readme"
+}