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diff --git a/site/content/docs/migration.md b/site/content/docs/migration.md new file mode 100644 index 000000000..5be6c6fa1 --- /dev/null +++ b/site/content/docs/migration.md @@ -0,0 +1,450 @@ +--- +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 +--- + +## v5.0.0-beta2 + +### Sass + +#### Utilities + +- Renamed `--aspect-ratio` to `--bs-aspect-ratio` to be consistent with other custom properties. +- Extended the `.visually-hidden-focusable` helper to also work on containers, using `:focus-within`. +- `bootstrap-utilities.css` now also includes our helpers. Helpers don't need to be imported in custom builds anymore. +- Extended form validation states customization capabilities. Added three new optional parameters to the `form-validation-state` mixin: `tooltip-color`, `tooltip-bg-color`, `focus-box-shadow`. These parameters can be set in the `$form-validation-states` map. [See #31757](https://github.com/twbs/bootstrap/pull/31757). + +### JavaScript + +- The default value for the `fallbackPlacements` is changed to `['top', 'right', 'bottom', 'left']` for better placement of popper elements. + +## v5.0.0-beta1 + +### RTL + +**The RTL feature is still experimental and will probably evolve according to user feedback.** Spotted something or have an improvement to suggest? [Open an issue]({{< param repo >}}/issues/new), we'd love to get your insights. + +#### Sass + +Horizontal direction sensitive variables, utilities and mixins are renamed with more logical names — `start` and `end` in lieu of `left` and `right`. + +##### Components + +- Renamed `.dropleft` and `.dropright` to `.dropstart` and `.dropend`. +- Renamed `.dropdown-menu-*-left` and `.dropdown-menu-*-right` to `.dropdown-menu-*-start` and `.dropdown-menu-*-end`. +- Renamed `.bs-popover-left` and `.bs-popover-right` to `.bs-popover-start` and `.bs-popover-end`. +- Renamed `.bs-tooltip-left` and `.bs-tooltip-right` to `.bs-tooltip-start` and `.bs-tooltip-end`. +- Renamed `.carousel-item-left` and `.carousel-item-right` to `.carousel-item-start` and `.carousel-item-end`. + +##### Utilities + +- 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`. + +Breakpoints specific variants are consequently renamed too (e.g. `.text-md-start` replaces `.text-md-left`). + +**Note**: if you used v4 to make RTL pages, ensure to reverse changes mentioned above: e.g. use `.*-start` were you used `.*-right`. + +##### Mixins + +- Renamed `border-left-radius()` and `border-right-radius()` to `border-start-radius()` and `border-end-radius()` — as well as their corner relative variants (eg. `.border-bottom-left-radius` became `.border-bottom-start-radius`). +- Renamed `caret-left()` and `caret-right()` to `caret-start()` and `caret-end()` — subsequently, the `caret()` mixin now takes `start` and `end` as arguments instead of `left` and `right`. + +##### Variables + +- New `$breadcrumb-divider-flipped` if a different breadcrumb separator is needed in RTL. +- Renamed `$navbar-brand-margin-right` to `$navbar-brand-margin-end`. +- Renamed `$pagination-margin-left` to `$pagination-margin-start`. +- Renamed `$form-check-padding-left` to `$form-check-padding-start`. +- Renamed `$form-switch-padding-left` to `$form-switch-padding-start`. +- Renamed `$form-check-inline-margin-right` to `$form-check-inline-margin-end`. +- Renamed `$form-select-feedback-icon-padding-right` to `$form-select-feedback-icon-padding-end`. + +### JavaScript + +- 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`. +- Updated Popper to v2.x: + - Removed `offset` option from our Tooltip/Popover and Dropdown plugins; this can still be achieved using the `popperConfig` parameter. + - The `fallbackPlacement` option has become `fallbackPlacements`. + +### Sass + +- Renamed `scale-color()` function to `shift-color()` to avoid collision with Sass's own color scaling function. + +### Utilities + +- Added new `.translate-middle-x` & `.translate-middle-y` utilities to horizontally or vertically center absolute/fixed positioned elements. + +### Components + +#### 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. + +#### Toasts + +- Toasts can now be [positioned]({{< docsref "/components/toasts#placement" >}}) in a `.toast-container` with the help of [positioning utilities]({{< docsref "/utilities/position" >}}). + +## v5.0.0-alpha3 + +### Browser support + +- Dropped support for Microsoft Edge Legacy. See [here](#browser-support-1) for the previous browser support changes. + +### Sass + +- The color system which worked with `color-level()` and `$theme-color-interval` was removed in favor of a new color system. All `lighten()` and `darken()` functions in our codebase are replaced by `tint-color()` and `shade-color()`. These functions will mix the color with either white or black instead of changing its lightness by a fixed amount. The `scale-color()` (changed to `shift-color()` in Beta 1) will either tint or shade a color depending on whether its weight parameter is positive or negative. [See #30622](https://github.com/twbs/bootstrap/pull/30622) for more details. +- Spinners now honor `prefers-reduced-motion: reduce` by slowing down animations. [See #31882](https://github.com/twbs/bootstrap/pull/31882). + +### Reboot + +- Introduce `$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) + +### Buttons + +- [Dropped `.btn-block` in favor of CSS grid utility classes.]({{< docsref "/components/buttons#block-buttons" >}}) Instead of applying `.btn-block` to individual buttons, a group of buttons now get wrapped in a parent `.d-grid` class and can use `.gap-*` utilities for spacing. For individual "block buttons", add `.w-100`. + +### Forms + +- 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. +- Promoted the Floating labels example to fully supported form component. [See the new Floating labels page.]({{< docsref "/forms/floating-labels" >}}) +- File inputs now use the `.form-control` class and don't require JavaScript, additional HTML, or additional classes. [See #31955](https://github.com/twbs/bootstrap/pull/31955). +- Added `cursor:pointer` to `.form-control-color` color inputs. + +### Utilities + +- **Text utilities:** + - 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. + - Renamed `.font-weight-*` utilities as `.fw-*` for brevity and consistency. + - Renamed `.font-style-*` utilities as `.fst-*` for brevity and consistency. +- Added `.d-grid` to display utilities +- Added new `gap` utilities (`.gap`) for CSS Grid layouts +- Removed `.rounded-sm` and `rounded-lg`, and introduced `.rounded-0` to `.rounded-3`. [See #31687](https://github.com/twbs/bootstrap/pull/31687). + +## v5.0.0-alpha2 + +### Sass + +- Added default parameters to each `border-radius` mixin. [See #31571](https://github.com/twbs/bootstrap/pull/31571). +- Updated the next breakpoint when targeting only the `xs` breakpoint. [See #31500](https://github.com/twbs/bootstrap/pull/31500). +- `box-shadow` mixins now allow `null` values and drop `none` from multiple arguments. [See #30394](https://github.com/twbs/bootstrap/pull/30394). + +### Docs + +- Renamed "Navs" page to "Navs & Tabs" +- Renamed "Screen readers" helper page to "Visually hidden", and filename to `visually-hidden` +- Renamed "Checks" page to "Checks & radios", and filename to `checks-radios` +- Improved documentation of check/radio powered button groups +- Improved skip links in our docs. +- Redesigned docs navigation for larger tap targets on mobile and a streamlined subnav. +- [#31114](https://github.com/twbs/bootstrap/pull/31114): Improved form documentation with regards to accessibility. + +### Layout + +- Container horizontal padding updated to match the gutter size of `.row`s. +- [#31439](https://github.com/twbs/bootstrap/pull/31439): Removed `flex: 1 0 100%` from rows due to regressions in grid behavior. + +### Reboot + +- Updated `th` styling to use a default `null` value for `font-weight` and inherit `text-align` instead of setting explicitly. + +### Colors + +- Bumped color contrast ratio from 3:1 to 4.5:1. +- Set `$black` as color contrast color instead of `$gray-900`. +- Improved `$green` (and its theme alias `$success`) color to reach a new minimum color contrast (moving from `#28a745` to `#198754`). +- Improved `$cyan` (and its theme alias `$info`) color to be more vibrant (moving from `#17a2b8` to `#0dcaf0`). + +### Forms + +- [#31383](https://github.com/twbs/bootstrap/pull/31383): Resized checks and radios to be `1em` instead of `1.25em` in an effort to make them scale better with custom `$font-size-base` values and more. + +### Components + +#### Badges + +- [#31132](https://github.com/twbs/bootstrap/pull/31132): Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`. + +#### Buttons + +- [#30639](https://github.com/twbs/bootstrap/pull/30639): Disabled states of buttons are easier to customize thanks to additional arguments in the `button-variant()` mixin. +- [#30989](https://github.com/twbs/bootstrap/pull/30989): Updated buttons to ensure increased contrast on hover and active states. + +#### Carousel + +- Replaced chevron icons for carousel controls with new SVGs from [Bootstrap Icons]({{< param "icons" >}}). +- Added new [`.carousel-dark` variant]({{< docsref "/components/carousel#dark-variant" >}}) for dark text, controls, and indicators (great for lighter backgrounds). + +#### Close button + +- Renamed `.close` to `.btn-close` for a less generic name. +- Close buttons now use a `background-image` (embedded SVG) instead of a `×` in the HTML, allowing for easier customization without the need to touch your markup. +- Added new variables to better control the customization. +- Added new `.btn-close-white` variant that uses `filter: invert(1)` to enable higher contrast dismiss icons against darker backgrounds. + +#### Collapse + +- [#31346](https://github.com/twbs/bootstrap/pull/31346): Removed scroll anchoring for accordions. + +#### Dropdowns + +- Added new `.dropdown-menu-dark` variant and associated variables for on-demand dark dropdowns. +- Added new variable for `$dropdown-padding-x`. +- Darkened the dropdown divider for improved contrast. + +#### Navs + +- [#31035](https://github.com/twbs/bootstrap/pull/31035): Added new `null` variables for `font-size`, `font-weight`, `color`, and `:hover` `color` to the `.nav-link` class. + +#### Pagination + +- Added `transition`s to pagination links. [See #31396](https://github.com/twbs/bootstrap/pull/31396). + +#### Popovers + +- Renamed `whiteList` option to `allowList`. + +#### Toasts + +- [#31109](https://github.com/twbs/bootstrap/pull/31109): Made default toast duration 5 seconds. +- [#31155](https://github.com/twbs/bootstrap/pull/31155): Clear `timeout` before showing toasts. +- [#31381](https://github.com/twbs/bootstrap/pull/31381): Removed `overflow: hidden` from toasts and replaced with proper `border-radius`s with `calc()` functions. +- Updated docs to include additional examples for how to customize and theme toasts. + +#### Tooltips + +- Renamed `whiteList` option to `allowList`. + +### Helpers + +- 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 `--aspect-ratio` variable on the `.ratio` to create any [custom aspect ratio]({{< docsref "/helpers/ratio#custom-ratios" >}}). +- "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()`. + +### Utilities + +- [#31280](https://github.com/twbs/bootstrap/pull/31280): Added new [position utilities]({{< docsref "/utilities/position#arrange-elements" >}}) for `top`, `right`, `bottom`, and `left`. Values include `0`, `50%`, and `100%` for each property. + - We also added new `translate` utilities to accompany those position utilities for centering elements when they're being positioned. + - Some great examples have been added to the docs to show these off. +- [#31484](https://github.com/twbs/bootstrap/pull/31484): Added new [`border-width` utility]({{< docsref "/utilities/borders#border-width" >}}). +- [#31473](https://github.com/twbs/bootstrap/pull/31473): The `.d-none` utility was moved in our CSS to give it more weight over other display utilities. +- Renamed `.text-monospace` to `.font-monospace`. +- Removed `.text-hide` as it's an antiquated method for hiding text that shouldn't be used anymore. +- New `line-height` utilities: `.lh-1`, `.lh-sm`, `.lh-base` and `.lh-lg`. See [here]({{< docsref "/utilities/text#line-height" >}}). + +--- + +## v5.0.0-alpha1 + +### Browser support + +See the browser and devices page for details on what is currently supported in Bootstrap 5. Since v4, here's what's changed to our browser support: + +- Dropped support for Internet Explorer 10 and 11 +- Dropped support for Microsoft Edge < 16 +- Dropped support for Firefox < 60 +- Dropped support for Safari < 10 +- Dropped support for iOS Safari < 10 +- Dropped support for Chrome < 60 +- Dropped support for Android < 6 + +### Sass + +Changes to our source Sass files and compiled CSS. + +- Removed `hover`, `hover-focus`, `plain-hover-focus`, and `hover-focus-active` mixins. Use regular CSS syntax for these moving forward. [See #28267](https://github.com/twbs/bootstrap/pull/28267). +- Remove previously deprecated mixins + - `float()` + - `form-control-mixin()` + - `nav-divider()` + - `retina-img()` + - `text-hide()` (also dropped the associated utility class, `.text-hide`) + - `visibility()` + - `form-control-focus()` +- Rearranged forms source files under `scss/forms/`. [See Forms section for more details.](#forms) +- Removed print styles and `$enable-print-styles` variable. Print display classes, however, have remained intact. [See #28339](https://github.com/twbs/bootstrap/pull/28339). +- Dropped `color()`, `theme-color()` & `gray()` functions in favor of variables. [See #29083](https://github.com/twbs/bootstrap/pull/29083) +- The `theme-color-level()` function is renamed to `color-level()` and now accepts any color you want instead of only `$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`. +- `$enable-grid-classes` doesn't disable the generation of container classes anymore [See #29146](https://github.com/twbs/bootstrap/pull/29146) +- Renamed `$enable-prefers-reduced-motion-media-query` and `$enable-pointer-cursor-for-buttons` to `$enable-reduced-motion` and `$enable-button-pointers` for brevity. +- Line heights are dropped from several components to simplify our codebase. The `button-size()` and `pagination-size()` do not accept line height parameters anymore. [See #29271](https://github.com/twbs/bootstrap/pull/29271) +- The `button-variant()` mixin now accepts 3 optional color parameters, for each button state, to override the color provided by `color-contrast()`. By default, these parameters will find which color provides more contrast against the button state's background color with `color-contrast()`. +- The `button-outline-variant()` mixin now accepts an additional argument, `$active-color`, for setting the button's active state text color. By default, this parameter will find which color provides more contrast against the button's active background color with `color-contrast()`. +- Ditch the Sass map merges, which makes it easier to remove redundant values. Keep in mind you now have to define all values in the Sass maps like `$theme-colors`. Check out how to deal with [Sass maps]({{< docsref "/customize/sass#maps-and-loops" >}}). +- `color-yiq()` function and related variables are renamed to `color-contrast()` since it's not related to YIQ colorspace anymore. [See #30168.](https://github.com/twbs/bootstrap/pull/30168/) + - `$yiq-contrasted-threshold` is renamed to `$min-contrast-ratio`. + - `$yiq-text-dark` and `$yiq-text-light` are respectively renamed to `$color-contrast-dark` and `$color-contrast-light`. +- Linear gradients are simplified when gradients are enabled and therefore, `gradient-bg()` now only accepts an optional `$color` parameter. +- The `bg-gradient-variant()` mixin is removed since the `.bg-gradient` class can now be used to add gradients to elements instead of the `.bg-gradient-*` classes. +- The `media-breakpoint-down()` uses the breakpoint itself instead of the next breakpoint. Use `media-breakpoint-down(lg)` instead of `media-breakpoint-down(md)` to target viewports smaller than the `lg` breakpoint. +- The `media-breakpoint-between()` mixin's second parameter also uses the breakpoint itself instead of the next breakpoint. Use `media-between(sm, lg)` instead of `media-breakpoint-between(sm, md)` to target viewports between the `sm` and `lg` breakpoints. +- The `box-shadow()` mixin now better supports `none` and `null` with multiple arguments. Now you can pass multiple arguments with either value and get the expected output. [See #30394](https://github.com/twbs/bootstrap/pull/30394). +- Each `border-radius()` mixin now has a default value. You can now call these mixins without specifying a border radius value and the `$border-radius` variable will be used. [See #31571](https://github.com/twbs/bootstrap/pull/31571) + +### JavaScript + +Changes to our source and compiled JavaScript files. + +- Dropped jQuery dependency and rewrote plugins to be in regular JavaScript. +- Removed underscore from public static methods like `_getInstance()` → `getInstance()`. + +### Color system + +We've updated the color system that powers Bootstrap to improve color contrast and provide a much more extensive set of colors. + +- Updated blue and pink base colors (`-500`) to ensure WCAG 2.1 AA contrast. +- Added new tints and shades for every color, providing nine separate colors for each base color, as new Sass variables. +- To support our color system, we've added new custom `tint-color()` and `shade-color()` functions to mix our colors appropriately. + +### Grid and layout + +Changes to any layout tools and our grid system. + +- Dropped the `.media` component as it can be built with utility classes. [See #28265](https://github.com/twbs/bootstrap/pull/28265). +- Remove `position: relative` from grid columns. +- The horizontal padding is added to the direct children in a row instead of the columns themselves. + - This simplifies our codebase. + - The column classes can now be used stand-alone. Whenever they are used outside a `.row`, horizontal padding won't be added. +- The responsive gutter classes can be used to control the gutter width in horizontal, vertical or both directions. +- The gutter width is now set in `rem` and decreased from `30px` to `1.5rem` (24px). +- `bootstrap-grid.css` now only applies `box-sizing: border-box` to the column instead of resetting the global box-sizing. This way the grid system can be used, even if `box-sizing: border-box` is not applied to each element. + +### Content, Reboot, etc + +Changes to Reboot, typography, tables, and more. + +- [RFS]({{< docsref "/getting-started/rfs" >}}) enabled for automated font size rescaling. [See #29152](https://github.com/twbs/bootstrap/pull/29152) +- Reset default horizontal `padding-left` on `<ul>` and `<ol>` elements from browser default `40px` to `2rem`. +- Simplified table styles (no more odd top border) and tightened cell padding. +- Nested tables do not inherit styles anymore. +- `.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`). +- The `table-row-variant()` mixin is renamed to `table-variant()` and accepts only 2 parameters: `$color` (colon name) and `$value` (color code). The border color and accent colors are automatically calculated based on the table factor variables. +- Split table cell padding variables into `-y` and `-x`. +- Dropped `.pre-scrollable` class. [See #29135](https://github.com/twbs/bootstrap/pull/29135) +- `.text-*` utilities do not add hover and focus states to links anymore. `.link-*` helper classes can be used instead. [See #29267](https://github.com/twbs/bootstrap/pull/29267) +- Drop `.text-justify` class. [See #29793](https://github.com/twbs/bootstrap/pull/29793) + +### Typography + +- Removed `$display-*` variables for a new `$display-font-sizes` Sass map. +- Removed individual `$display-*-weight` variables for a single `$display-font-weight`. +- Added two new `.display-*` heading styles, `.display-5` and `.display-6`. +- Resized existing display headings for a slightly more consistent set of `font-size`s. +- Links are underlined by default (not just on hover), unless they're part of specific components. + +### Forms + +- Rearranged form documentation under its own top-level section. + - Split out old Forms page into several subpages + - Moved input groups docs under the new Forms section +- Rearranged source Sass files under `scss/forms/`, including moving over input group styles. +- Combined native and custom checkboxes and radios into a single `.form-check` class. + - New checks support sizing via `em`/`font-size` or explicit modifier classes now. + - New checks now appear larger by default for improved usability. + - Dropped `.custom-control` and associated classes. + - Renamed most `$custom-control` variables to `$form-control` ones. +- Combined native and custom selects into `.form-select`. + - Dropped `.custom-select` and associated classes. + - Renamed most `$custom-select` variables to `$form-select` ones. +- Updated file input component with the same overall design, but improved HTML. + - Refactored `.form-file` markup to resolve some visual bugs while allowing translation and button text changes via HTML instead of CSS. + - Dropped native `.form-control-file` and `.form-control-range` components entirely. + - Renamed `.custom-file` to `.form-file` (including variables). **Watch out:** `.form-file` was later on dropped in `v5.0.0-alpha3`, now you can use `.form-control`. + - Added support for `:focus` and `:disabled` styles. +- Renamed `.custom-range` to `.form-range` (including variables). +- Dropped `.form-group` for margin utilities (we've replaced our docs examples with `.mb-3`). +- Dropped `.form-row` for the more flexible grid gutters. +- Dropped `.form-inline` for the more flexible grid. +- Dropped support for `.form-control-plaintext` inside `.input-group`s. +- Dropped `.input-group-append` and `.input-group-prepend`. You can now just add buttons and `.input-group-text` as direct children of the input groups. +- Form labels now require the `.form-label` class. Sass variables are now available to style form labels to your needs. [See #30476](https://github.com/twbs/bootstrap/pull/30476) + +### Components + +- Unified `padding` values for alerts, breadcrumbs, cards, dropdowns, list groups, modals, popovers, and tooltips to be based on our `$spacer` variable. [See #30564](https://github.com/twbs/bootstrap/pull/30564). + +#### Disabled states + +- Disabled states of the buttons, close button, pagination link & form range now have `pointer-events: none` added. This simplifies our codebase and makes it easier to override active states in CSS. [#29296](https://github.com/twbs/bootstrap/pull/29296). + +#### Alerts + +- Removed auto-darkening of `<hr>` elements in `.alert-*` class variants. `<hr>`s use `rgba()` for their color, so these should naturally blend anyway. + +#### Badges + +Badges were overhauled to better differentiate themselves from buttons and to better utilize utility classes. + +- Removed and replaced `.badge` modifier classes with background utility classes (e.g., use `.bg-primary` instead of `.badge-primary`) +- Removed `.badge-pill` for the `.rounded-pill` utility class +- Removed badge's hover and focus styles for `a.badge` and `button.badge`. + +#### Buttons + +- The checkbox/radio toggle is removed from the button plugin in favor of a CSS only solution, which is documented in the [form checks and radios]({{< docsref "/forms/checks-radios#toggle-buttons" >}}) docs. The `.btn-check` class can be added to inputs, any label with `.btn` and modifier class can be used to theme the labels. [See #30650](https://github.com/twbs/bootstrap/pull/30650). + +#### Cards + +- Removed the card columns in favor of a Masonry grid [See #28922](https://github.com/twbs/bootstrap/pull/28922). +- Removed card decks in favor of the grid which adds more flexibility over responsive behavior. + +#### Jumbotron + +- The jumbotron component is removed in favor of utility classes like `.bg-light` for the background color and `.p-*` classes to control padding. + +#### Navbars + +- All navbars now require a container within. This drastically simplifies spacing requirements and removes the need for extensive CSS overrides we added for responsive containers in v4. + +#### Pagination + +- Pagination links now have customizable `margin-left` that are dynamically rounded on all corners when separated from one another. + +#### Popovers + +- Renamed `.arrow` to `.popover-arrow` + +#### Tooltips + +- Renamed `.arrow` to `.tooltip-arrow` + +### Accessibility + +- Unlike the old `.sr-only-focusable`, which only worked in combination with `.sr-only`, `.sr-only-focusable` can be used as a standalone class without `.sr-only`. [See #28720](https://github.com/twbs/bootstrap/pull/28720). + +### Utilities + +### Grid + +- Decreased the number of responsive order utilities per breakpoint. The highest order utility with a number now is `.order-5` instead of `.order-12`. [See #28874](https://github.com/twbs/bootstrap/pull/28874). + +### Misc + +- Added `.bg-body` for quickly setting the `<body>`'s background to additional elements. +- Negative margin utilities are disabled by default. You can re-enable them by setting `$enable-negative-margins: true`, but keep in mind this can increase the file size quite a lot. + +### Docs + +- Removed "Wall of browser bugs" page because it has become obsolete +- Switched from Jekyll to Hugo + +### Build tools + +- Updated all devDependencies +- We support only the latest Node.js LTS releases which are 10 and 12 at the time of writing |