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diff --git a/site/content/docs/5.1/migration.md b/site/content/docs/5.1/migration.md new file mode 100644 index 0000000000..8ebb13b813 --- /dev/null +++ b/site/content/docs/5.1/migration.md @@ -0,0 +1,385 @@ +--- +layout: docs +title: Migrating to v5 +description: Track and review changes to the Bootstrap source files, documentation, and components to help you migrate from v4 to v5. +group: migration +aliases: "/migration/" +toc: true +--- + +## Dependencies + +- Dropped jQuery. +- Upgraded from Popper v1.x to Popper v2.x. +- Replaced Libsass with Dart Sass as our Sass compiler given Libsass was deprecated. +- Migrated from Jekyll to Hugo for building our documentation + +## Browser support + +- Dropped Internet Explorer 10 and 11 +- Dropped Microsoft Edge < 16 (Legacy Edge) +- Dropped Firefox < 60 +- Dropped Safari < 12 +- Dropped iOS Safari < 12 +- Dropped Chrome < 60 + +<hr class="my-5"> + +## Documentation changes + +- Redesigned homepage, docs layout, and footer. +- Added [new Parcel guide](https://getbootstrap.com/docs/5.1/getting-started/parcel/). +- Added [new Customize section](https://getbootstrap.com/docs/5.1/customize/overview/), replacing [v4's Theming page](https://getbootstrap.com/docs/4.6/getting-started/theming/), with new details on Sass, global configuration options, color schemes, CSS variables, and more. +- Reorganized all form documentation into [new Forms section](https://getbootstrap.com/docs/5.1/forms/overview/), breaking apart the content into more focused pages. +- Similarly, updated [the Layout section](https://getbootstrap.com/docs/5.1/layout/breakpoints/), to flesh out grid content more clearly. +- Renamed "Navs" component page to "Navs & Tabs". +- Renamed "Checks" page to "Checks & radios". +- Redesigned the navbar and added a new subnav to make it easier to get around our sites and docs versions. +- Added new keyboard shortcut for the search field: <kbd>Ctrl + /</kbd>. + +## Sass + +- We've ditched the default Sass map merges to make it easier to remove redundant values. Keep in mind you now have to define all values in the Sass maps like `$theme-colors`. Check out how to deal with [Sass maps]({{< docsref "/customize/sass#maps-and-loops" >}}). + +- <span class="badge bg-danger">Breaking</span> Renamed `color-yiq()` function and related variables to `color-contrast()` as it's no longer related to YIQ colorspace. [See #30168.](https://github.com/twbs/bootstrap/pull/30168/) + - `$yiq-contrasted-threshold` is renamed to `$min-contrast-ratio`. + - `$yiq-text-dark` and `$yiq-text-light` are respectively renamed to `$color-contrast-dark` and `$color-contrast-light`. + +- <span class="badge bg-danger">Breaking</span> Media query mixins parameters have changed for a more logical approach. + - `media-breakpoint-down()` uses the breakpoint itself instead of the next breakpoint (e.g., `media-breakpoint-down(lg)` instead of `media-breakpoint-down(md)` targets viewports smaller than `lg`). + - Similarly, the second parameter in `media-breakpoint-between()` also uses the breakpoint itself instead of the next breakpoint (e.g., `media-between(sm, lg)` instead of `media-breakpoint-between(sm, md)` targets viewports between `sm` and `lg`). + +- <span class="badge bg-danger">Breaking</span> Removed print styles and `$enable-print-styles` variable. Print display classes are still around. [See #28339](https://github.com/twbs/bootstrap/pull/28339). + +- <span class="badge bg-danger">Breaking</span> Dropped `color()`, `theme-color()`, and `gray()` functions in favor of variables. [See #29083](https://github.com/twbs/bootstrap/pull/29083). + +- <span class="badge bg-danger">Breaking</span> Renamed `theme-color-level()` function to `color-level()` and now accepts any color you want instead of only `$theme-color` colors. [See #29083](https://github.com/twbs/bootstrap/pull/29083) **Watch out:** `color-level()` was later on dropped in `v5.0.0-alpha3`. + +- <span class="badge bg-danger">Breaking</span> Renamed `$enable-prefers-reduced-motion-media-query` and `$enable-pointer-cursor-for-buttons` to `$enable-reduced-motion` and `$enable-button-pointers` for brevity. + +- <span class="badge bg-danger">Breaking</span> Removed the `bg-gradient-variant()` mixin. Use the `.bg-gradient` class to add gradients to elements instead of the generated `.bg-gradient-*` classes. + +- <span class="badge bg-danger">Breaking</span> **Removed previously deprecated mixins:** + - `hover`, `hover-focus`, `plain-hover-focus`, and `hover-focus-active` + - `float()` + - `form-control-mixin()` + - `nav-divider()` + - `retina-img()` + - `text-hide()` (also dropped the associated utility class, `.text-hide`) + - `visibility()` + - `form-control-focus()` + +- <span class="badge bg-danger">Breaking</span> Renamed `scale-color()` function to `shift-color()` to avoid collision with Sass's own color scaling function. + +- `box-shadow` mixins now allow `null` values and drop `none` from multiple arguments. [See #30394](https://github.com/twbs/bootstrap/pull/30394). + +- The `border-radius()` mixin now has a default value. + +## Color system + +- The color system which worked with `color-level()` and `$theme-color-interval` was removed in favor of a new color system. All `lighten()` and `darken()` functions in our codebase are replaced by `tint-color()` and `shade-color()`. These functions will mix the color with either white or black instead of changing its lightness by a fixed amount. The `shift-color()` will either tint or shade a color depending on whether its weight parameter is positive or negative. [See #30622](https://github.com/twbs/bootstrap/pull/30622) for more details. + +- Added new tints and shades for every color, providing nine separate colors for each base color, as new Sass variables. + +- Improved color contrast. Bumped color contrast ratio from 3:1 to 4.5:1 and updated blue, green, cyan, and pink colors to ensure WCAG 2.1 AA contrast. Also changed our color contrast color from `$gray-900` to `$black`. + +- To support our color system, we've added new custom `tint-color()` and `shade-color()` functions to mix our colors appropriately. + +## Grid updates + +- **New breakpoint!** Added new `xxl` breakpoint for `1400px` and up. No changes to all other breakpoints. + +- **Improved gutters.** Gutters are now set in rems, and are narrower than v4 (`1.5rem`, or about `24px`, down from `30px`). This aligns our grid system's gutters with our spacing utilities. + - Added new [gutter class](https://getbootstrap.com/docs/5.1/layout/gutters/) (`.g-*`, `.gx-*`, and `.gy-*`) to control horizontal/vertical gutters, horizontal gutters, and vertical gutters. + - <span class="badge bg-danger">Breaking</span> Renamed `.no-gutters` to `.g-0` to match new gutter utilities. + +- Columns no longer have `position: relative` applied, so you may have to add `.position-relative` to some elements to restore that behavior. + +- <span class="badge bg-danger">Breaking</span> Dropped several `.order-*` classes that often went unused. We now only provide `.order-1` to `.order-5` out of the box. + +- <span class="badge bg-danger">Breaking</span> Dropped the `.media` component as it can be easily replicated with utilities. [See #28265](https://github.com/twbs/bootstrap/pull/28265) and the [flex utilities page for an example]({{< docsref "/utilities/flex#media-object" >}}). + +- <span class="badge bg-danger">Breaking</span> `bootstrap-grid.css` now only applies `box-sizing: border-box` to the column instead of resetting the global box-sizing. This way, our grid styles can be used in more places without interference. + +- `$enable-grid-classes` no longer disables the generation of container classes anymore. [See #29146.](https://github.com/twbs/bootstrap/pull/29146) + +- Updated the `make-col` mixin to default to equal columns without a specified size. + +## Content, Reboot, etc + +- **[RFS]({{< docsref "/getting-started/rfs" >}}) is now enabled by default.** Headings using the `font-size()` mixin will automatically adjust their `font-size` to scale with the viewport. _This feature was previously opt-in with v4._ + +- <span class="badge bg-danger">Breaking</span> Overhauled our display typography to replace our `$display-*` variables and with a `$display-font-sizes` Sass map. Also removed the individual `$display-*-weight` variables for a single `$display-font-weight` and adjusted `font-size`s. + +- Added two new `.display-*` heading sizes, `.display-5` and `.display-6`. + +- **Links are underlined by default** (not just on hover), unless they're part of specific components. + +- **Redesigned tables** to refresh their styles and rebuild them with CSS variables for more control over styling. + +- <span class="badge bg-danger">Breaking</span> Nested tables do not inherit styles anymore. + +- <span class="badge bg-danger">Breaking</span> `.thead-light` and `.thead-dark` are dropped in favor of the `.table-*` variant classes which can be used for all table elements (`thead`, `tbody`, `tfoot`, `tr`, `th` and `td`). + +- <span class="badge bg-danger">Breaking</span> The `table-row-variant()` mixin is renamed to `table-variant()` and accepts only 2 parameters: `$color` (color name) and `$value` (color code). The border color and accent colors are automatically calculated based on the table factor variables. + +- Split table cell padding variables into `-y` and `-x`. + +- <span class="badge bg-danger">Breaking</span> Dropped `.pre-scrollable` class. [See #29135](https://github.com/twbs/bootstrap/pull/29135) + +- <span class="badge bg-danger">Breaking</span> `.text-*` utilities do not add hover and focus states to links anymore. `.link-*` helper classes can be used instead. [See #29267](https://github.com/twbs/bootstrap/pull/29267) + +- <span class="badge bg-danger">Breaking</span> Dropped `.text-justify` class. [See #29793](https://github.com/twbs/bootstrap/pull/29793) + +- <span class="badge bg-danger">Breaking</span> `<hr>` elements now use `height` instead of `border` to better support the `size` attribute. This also enables use of padding utilities to create thicker dividers (e.g., `<hr class="py-1">`). + +- Reset default horizontal `padding-left` on `<ul>` and `<ol>` elements from browser default `40px` to `2rem`. + +- Added `$enable-smooth-scroll`, which applies `scroll-behavior: smooth` globally—except for users asking for reduced motion through `prefers-reduced-motion` media query. [See #31877](https://github.com/twbs/bootstrap/pull/31877) + +## RTL + +- Horizontal direction specific variables, utilities, and mixins have all been renamed to use logical properties like those found in flexbox layouts—e.g., `start` and `end` in lieu of `left` and `right`. + +## Forms + +- **Added new floating forms!** We've promoted the Floating labels example to fully supported form components. [See the new Floating labels page.]({{< docsref "/forms/floating-labels" >}}) + +- <span class="badge bg-danger">Breaking</span> **Consolidated native and custom form elements.** Checkboxes, radios, selects, and other inputs that had native and custom classes in v4 have been consolidated. Now nearly all our form elements are entirely custom, most without the need for custom HTML. + - `.custom-check` is now `.form-check`. + - `.custom-check.custom-switch` is now `.form-check.form-switch`. + - `.custom-select` is now `.form-select`. + - `.custom-file` and `.form-file` have been replaced by custom styles on top of `.form-control`. + - `.custom-range` is now `.form-range`. + - Dropped native `.form-control-file` and `.form-control-range`. + +- <span class="badge bg-danger">Breaking</span> Dropped `.input-group-append` and `.input-group-prepend`. You can now just add buttons and `.input-group-text` as direct children of the input groups. + +- The longstanding [Missing border radius on input group with validation feedback bug](https://github.com/twbs/bootstrap/issues/25110) is finally fixed by adding an additional `.has-validation` class to input groups with validation. + +- <span class="badge bg-danger">Breaking</span> **Dropped form-specific layout classes for our grid system.** Use our grid and utilities instead of `.form-group`, `.form-row`, or `.form-inline`. + +- <span class="badge bg-danger">Breaking</span> Form labels now require `.form-label`. + +- <span class="badge bg-danger">Breaking</span> `.form-text` no longer sets `display`, allowing you to create inline or block help text as you wish just by changing the HTML element. + +- Validation icons are no longer applied to `<select>`s with `multiple`. + +- Rearranged source Sass files under `scss/forms/`, including input group styles. + +<hr class="my-5"> + +## Components + +- Unified `padding` values for alerts, breadcrumbs, cards, dropdowns, list groups, modals, popovers, and tooltips to be based on our `$spacer` variable. [See #30564](https://github.com/twbs/bootstrap/pull/30564). + +### Accordion + +- Added [new accordion component]({{< docsref "/components/accordion" >}}). + +### Alerts + +- Alerts now have [examples with icons]({{< docsref "/components/alerts#icons" >}}). + +- Removed custom styles for `<hr>`s in each alert since they already use `currentColor`. + +### Badges + +- <span class="badge bg-danger">Breaking</span> Dropped all `.badge-*` color classes for background utilities (e.g., use `.bg-primary` instead of `.badge-primary`). + +- <span class="badge bg-danger">Breaking</span> Dropped `.badge-pill`—use the `.rounded-pill` utility instead. + +- <span class="badge bg-danger">Breaking</span> Removed hover and focus styles for `<a>` and `<button>` elements. + +- Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`. + +### Breadcrumbs + +- Simplified the default appearance of breadcrumbs by removing `padding`, `background-color`, and `border-radius`. + +- Added new CSS custom property `--bs-breadcrumb-divider` for easy customization without needing to recompile CSS. + +### Buttons + +- <span class="badge bg-danger">Breaking</span> **[Toggle buttons](https://getbootstrap.com/docs/5.1/forms/checks-radios/#toggle-buttons), with checkboxes or radios, no longer require JavaScript and have new markup.** We no longer require a wrapping element, add `.btn-check` to the `<input>`, and pair it with any `.btn` classes on the `<label>`. [See #30650](https://github.com/twbs/bootstrap/pull/30650). _The docs for this has moved from our Buttons page to the new Forms section._ + +- <span class="badge bg-danger">Breaking</span> **Dropped `.btn-block` for utilities.** Instead of using `.btn-block` on the `.btn`, wrap your buttons with `.d-grid` and a `.gap-*` utility to space them as needed. Switch to responsive classes for even more control over them. [Read the docs for some examples.](https://getbootstrap.com/docs/5.1/components/buttons/#block-buttons) + +- Updated our `button-variant()` and `button-outline-variant()` mixins to support additional parameters. + +- Updated buttons to ensure increased contrast on hover and active states. + +- Disabled buttons now have `pointer-events: none;`. + +### Card + +- <span class="badge bg-danger">Breaking</span> Dropped `.card-deck` in favor of our grid. Wrap your cards in column classes and add a parent `.row-cols-*` container to recreate card decks (but with more control over responsive alignment). + +- <span class="badge bg-danger">Breaking</span> Dropped `.card-columns` in favor of Masonry. [See #28922](https://github.com/twbs/bootstrap/pull/28922). + +- <span class="badge bg-danger">Breaking</span> Replaced the `.card` based accordion with a [new Accordion component]({{< docsref "/components/accordion" >}}). + +### Carousel + +- Added new [`.carousel-dark` variant]({{< docsref "/components/carousel#dark-variant" >}}) for dark text, controls, and indicators (great for lighter backgrounds). + +- Replaced chevron icons for carousel controls with new SVGs from [Bootstrap Icons]({{< param "icons" >}}). + +### Close button + +- <span class="badge bg-danger">Breaking</span> Renamed `.close` to `.btn-close` for a less generic name. + +- Close buttons now use a `background-image` (embedded SVG) instead of a `×` in the HTML, allowing for easier customization without the need to touch your markup. + +- Added new `.btn-close-white` variant that uses `filter: invert(1)` to enable higher contrast dismiss icons against darker backgrounds. + +### Collapse + +- Removed scroll anchoring for accordions. + +### Dropdowns + +- Added new `.dropdown-menu-dark` variant and associated variables for on-demand dark dropdowns. + +- Added new variable for `$dropdown-padding-x`. + +- Darkened the dropdown divider for improved contrast. + +- <span class="badge bg-danger">Breaking</span> All the events for the dropdown are now triggered on the dropdown toggle button and then bubbled up to the parent element. + +- Dropdown menus now have a `data-bs-popper="static"` attribute set when the positioning of the dropdown is static and `data-bs-popper="none"` when dropdown is in the navbar. This is added by our JavaScript and helps us use custom position styles without interfering with Popper's positioning. + +- <span class="badge bg-danger">Breaking</span> Dropped `flip` option for dropdown plugin in favor of native Popper configuration. You can now disable the flipping behavior by passing an empty array for [`fallbackPlacements`](https://popper.js.org/docs/v2/modifiers/flip/#fallbackplacements) option in [flip](https://popper.js.org/docs/v2/modifiers/flip/) modifier. + +- Dropdown menus can now be clickable with a new `autoClose` option to handle the [auto close behavior]({{< docsref "/components/dropdowns#auto-close-behavior" >}}). You can use this option to accept the click inside or outside the dropdown menu to make it interactive. + +- Dropdowns now support `.dropdown-item`s wrapped in `<li>`s. + +### Jumbotron + +- <span class="badge bg-danger">Breaking</span> Dropped the jumbotron component as it can be replicated with utilities. [See our new Jumbotron example for a demo.](https://getbootstrap.com/docs/5.1/examples/jumbotron/) + +### List group + +- Added new [`.list-group-numbered` modifier]({{< docsref "/components/list-group#numbered" >}}) to list groups. + +### Navs and tabs + +- Added new `null` variables for `font-size`, `font-weight`, `color`, and `:hover` `color` to the `.nav-link` class. + +### Navbars + +- <span class="badge bg-danger">Breaking</span> Navbars now require a container within (to drastically simplify spacing requirements and CSS required). + +### Offcanvas + +- Added the new [offcanvas component]({{< docsref "/components/offcanvas" >}}). + +### Pagination + +- Pagination links now have customizable `margin-left` that are dynamically rounded on all corners when separated from one another. + +- Added `transition`s to pagination links. + +### Popovers + +- <span class="badge bg-danger">Breaking</span> Renamed `.arrow` to `.popover-arrow` in our default popover template. + +- Renamed `whiteList` option to `allowList`. + +### Spinners + +- Spinners now honor `prefers-reduced-motion: reduce` by slowing down animations. [See #31882](https://github.com/twbs/bootstrap/pull/31882). + +- Improved spinner vertical alignment. + +### Toasts + +- Toasts can now be [positioned]({{< docsref "/components/toasts#placement" >}}) in a `.toast-container` with the help of [positioning utilities]({{< docsref "/utilities/position" >}}). + +- Changed default toast duration to 5 seconds. + +- Removed `overflow: hidden` from toasts and replaced with proper `border-radius`s with `calc()` functions. + +### Tooltips + +- <span class="badge bg-danger">Breaking</span> Renamed `.arrow` to `.tooltip-arrow` in our default tooltip template. + +- <span class="badge bg-danger">Breaking</span> The default value for the `fallbackPlacements` is changed to `['top', 'right', 'bottom', 'left']` for better placement of popper elements. + +- <span class="badge bg-danger">Breaking</span> Renamed `whiteList` option to `allowList`. + +## Utilities + +- <span class="badge bg-danger">Breaking</span> Renamed several utilities to use logical property names instead of directional names with the addition of RTL support: + - Renamed `.left-*` and `.right-*` to `.start-*` and `.end-*`. + - Renamed `.float-left` and `.float-right` to `.float-start` and `.float-end`. + - Renamed `.border-left` and `.border-right` to `.border-start` and `.border-end`. + - Renamed `.rounded-left` and `.rounded-right` to `.rounded-start` and `.rounded-end`. + - Renamed `.ml-*` and `.mr-*` to `.ms-*` and `.me-*`. + - Renamed `.pl-*` and `.pr-*` to `.ps-*` and `.pe-*`. + - Renamed `.text-left` and `.text-right` to `.text-start` and `.text-end`. + +- <span class="badge bg-danger">Breaking</span> Disabled negative margins by default. + +- Added new `.bg-body` class for quickly setting the `<body>`'s background to additional elements. + +- Added new [position utilities]({{< docsref "/utilities/position#arrange-elements" >}}) for `top`, `right`, `bottom`, and `left`. Values include `0`, `50%`, and `100%` for each property. + +- Added new `.translate-middle-x` & `.translate-middle-y` utilities to horizontally or vertically center absolute/fixed positioned elements. + +- Added new [`border-width` utilities]({{< docsref "/utilities/borders#border-width" >}}). + +- <span class="badge bg-danger">Breaking</span> Renamed `.text-monospace` to `.font-monospace`. + +- <span class="badge bg-danger">Breaking</span> Removed `.text-hide` as it's an antiquated method for hiding text that shouldn't be used anymore. + +- Added `.fs-*` utilities for `font-size` utilities (with RFS enabled). These use the same scale as HTML's default headings (1-6, large to small), and can be modified via Sass map. + +- <span class="badge bg-danger">Breaking</span> Renamed `.font-weight-*` utilities as `.fw-*` for brevity and consistency. + +- <span class="badge bg-danger">Breaking</span> Renamed `.font-style-*` utilities as `.fst-*` for brevity and consistency. + +- Added `.d-grid` to display utilities and new `gap` utilities (`.gap`) for CSS Grid and flexbox layouts. + +- <span class="badge bg-danger">Breaking</span> Removed `.rounded-sm` and `rounded-lg`, and introduced a new scale of classes, `.rounded-0` to `.rounded-3`. [See #31687](https://github.com/twbs/bootstrap/pull/31687). + +- Added new `line-height` utilities: `.lh-1`, `.lh-sm`, `.lh-base` and `.lh-lg`. See [here]({{< docsref "/utilities/text#line-height" >}}). + +- Moved the `.d-none` utility in our CSS to give it more weight over other display utilities. + +- Extended the `.visually-hidden-focusable` helper to also work on containers, using `:focus-within`. + +## Helpers + +- <span class="badge bg-danger">Breaking</span> **Responsive embed helpers have been renamed to [ratio helpers]({{< docsref "/helpers/ratio" >}})** with new class names and improved behaviors, as well as a helpful CSS variable. + - Classes have been renamed to change `by` to `x` in the aspect ratio. For example, `.ratio-16by9` is now `.ratio-16x9`. + - We've dropped the `.embed-responsive-item` and element group selector in favor of a simpler `.ratio > *` selector. No more class is needed, and the ratio helper now works with any HTML element. + - The `$embed-responsive-aspect-ratios` Sass map has been renamed to `$aspect-ratios` and its values have been simplified to include the class name and the percentage as the `key: value` pair. + - CSS variables are now generated and included for each value in the Sass map. Modify the `--bs-aspect-ratio` variable on the `.ratio` to create any [custom aspect ratio]({{< docsref "/helpers/ratio#custom-ratios" >}}). + +- <span class="badge bg-danger">Breaking</span> **"Screen reader" classes are now ["visually hidden" classes]({{< docsref "/helpers/visually-hidden" >}}).** + - Changed the Sass file from `scss/helpers/_screenreaders.scss` to `scss/helpers/_visually-hidden.scss` + - Renamed `.sr-only` and `.sr-only-focusable` to `.visually-hidden` and `.visually-hidden-focusable` + - Renamed `sr-only()` and `sr-only-focusable()` mixins to `visually-hidden()` and `visually-hidden-focusable()`. + +- `bootstrap-utilities.css` now also includes our helpers. Helpers don't need to be imported in custom builds anymore. + +## JavaScript + +- **Dropped jQuery dependency** and rewrote plugins to be in regular JavaScript. + +- <span class="badge bg-danger">Breaking</span> Data attributes for all JavaScript plugins are now namespaced to help distinguish Bootstrap functionality from third parties and your own code. For example, we use `data-bs-toggle` instead of `data-toggle`. + +- **All plugins can now accept a CSS selector as the first argument.** You can either pass a DOM element or any valid CSS selector to create a new instance of the plugin: + + ```js + var modal = new bootstrap.Modal('#myModal') + var dropdown = new bootstrap.Dropdown('[data-bs-toggle="dropdown"]') + ``` + +- `popperConfig` can be passed as a function that accepts the Bootstrap's default Popper config as an argument, so that you can merge this default configuration in your way. **Applies to dropdowns, popovers, and tooltips.** + +- The default value for the `fallbackPlacements` is changed to `['top', 'right', 'bottom', 'left']` for better placement of Popper elements. **Applies to dropdowns, popovers, and tooltips.** + +- Removed underscore from public static methods like `_getInstance()` → `getInstance()`. |