From 48ae5a7149d30d7d80cecbaaabaa88f7679c9172 Mon Sep 17 00:00:00 2001
From: Mark Otto <markd.otto@gmail.com>
Date: Wed, 5 May 2021 08:24:26 -0700
Subject: [PATCH] Rewrite migration guide (#33834)

- De-duplicates bulk of the content for a migration from v4 to v5
- Adds clear breaking labels where appropriate
- Leaves room for more guidance around doing the actual migration
---
 site/assets/scss/_content.scss     |   7 +
 site/content/docs/5.0/migration.md | 554 +++++++++++------------------
 2 files changed, 224 insertions(+), 337 deletions(-)

diff --git a/site/assets/scss/_content.scss b/site/assets/scss/_content.scss
index e55a7aa63473..cc22ffe11059 100644
--- a/site/assets/scss/_content.scss
+++ b/site/assets/scss/_content.scss
@@ -21,6 +21,13 @@
   > ul li,
   > ol li {
     margin-bottom: .25rem;
+
+    // stylelint-disable selector-max-type
+    > ul {
+      margin-top: -.5rem;
+      margin-bottom: 1rem;
+    }
+    // stylelint-enable selector-max-type
   }
 
   // Override Bootstrap defaults
diff --git a/site/content/docs/5.0/migration.md b/site/content/docs/5.0/migration.md
index edfbefc4e915..df0abea3df43 100644
--- a/site/content/docs/5.0/migration.md
+++ b/site/content/docs/5.0/migration.md
@@ -7,494 +7,374 @@ aliases: "/migration/"
 toc: true
 ---
 
-## v5.0.0
+## Dependencies
 
-### Components
+- 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
 
-- Added new `.offcanvas-top` modifier class to round out offcanvas placement options.
-- Offcanvas header elements are now vertically aligned with one another.
-- Alerts now have [examples with icons]({{< docsref "/components/alerts#icons" >}}).
-- Improved spinner vertical alignment.
+## Browser support
 
-### Forms
+- Dropped Internet Explorer 10 and 11
+- Dropped Microsoft Edge < 16 (Legacy Edge)
+- Dropped Firefox < 60
+- Dropped Safari < 10
+- Dropped iOS Safari < 10
+- Dropped Chrome < 60
+- Dropped Android < 6
 
-- Validation icons are no longer applied to `<select>`s with `multiple`.
+<hr class="my-5">
 
-### JavaScript
+## Documentation changes
 
-- 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.
-- Fixed offcanvas focus issues when scrolling is allowed.
-- Fixed click handling on tabs.
+- Redesigned homepage, docs layout, and footer.
+- Added [new Parcel guide](https://getbootstrap.com/docs/5.0/getting-started/parcel/).
+- Added [new Customize section](https://getbootstrap.com/docs/5.0/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/5.0/forms/overview/), breaking apart the content into more focused pages.
+- Similarly, updated [the Layout section](https://getbootstrap.com/docs/5.0/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
+## Sass
 
-- Added new `color-scheme` mixin
-- Update the `make-col` mixin to default to equal widths without a specified size
+- 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" >}}).
 
-## v5.0.0-beta3
+- <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`.
 
-### Components
+- <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).
 
-- Added new [`.list-group-numbered` modifier]({{< docsref "/components/list-group#numbered" >}}) to list groups.
+- <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).
 
-### JavaScript
+- <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`.
 
-- 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:
+- <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.
 
-  ```js
-  var modal = new bootstrap.Modal('#myModal')
-  var dropdown = new bootstrap.Dropdown('[data-bs-toggle="dropdown"]')
-  ```
+- <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.
 
-- 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.
+- <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()`
 
-### Utilities
+- <span class="badge bg-danger">Breaking</span> Renamed `scale-color()` function to `shift-color()` to avoid collision with Sass's own color scaling function.
 
-- Dropped the `0` entry in `$border-widths` map to remove the duplicated `.border-0` class.
+- `box-shadow` mixins now allow `null` values and drop `none` from multiple arguments. [See #30394](https://github.com/twbs/bootstrap/pull/30394).
 
-## v5.0.0-beta2
+- The `border-radius()` mixin now has a default value.
 
-### Utilities
+## Color system
 
-- 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 `$form-validation-states` map. [See #31757](https://github.com/twbs/bootstrap/pull/31757).
+- The color system which worked with `color-level()` and `$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.
 
-### JavaScript
+- Added new tints and shades for every color, providing nine separate colors for each base color, as new Sass variables.
 
-- Restored `offset` option for Dropdown, Popover and Tooltip plugins.
-- The default value for the `fallbackPlacements` is changed to `['top', 'right', 'bottom', 'left']` for better placement of popper elements.
-- 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.
-- `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.
+- 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`.
 
-## v5.0.0-beta1
+- To support our color system, we've added new custom `tint-color()` and `shade-color()` functions to mix our colors appropriately.
 
-### RTL
+## Grid updates
 
-**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.
+- **New breakpoint!** Added new `xxl` breakpoint for `1400px` and up. No changes to all other breakpoints.
 
-#### Sass
+- **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/5.0/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.
 
-Horizontal direction sensitive variables, utilities and mixins are renamed with more logical names — `start` and `end` in lieu of `left` and `right`.
+- Columns no longer have `position: relative` applied, so you may have to add `.position-relative` to some elements to restore that behavior.
 
-##### Components
+- <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.
 
-- 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`.
+- <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" >}}).
 
-##### Utilities
+- <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.
 
-- 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`.
+- `$enable-grid-classes` no longer disables the generation of container classes anymore. [See #29146.](https://github.com/twbs/bootstrap/pull/29146)
 
-Breakpoints specific variants are consequently renamed too (e.g. `.text-md-start` replaces `.text-md-left`).
+- Updated the `make-col` mixin to default to equal columns without a specified size.
 
-**Note**: if you used v4 to make RTL pages, ensure to reverse changes mentioned above: e.g. use `.*-start` where you used `.*-right`.
+## Content, Reboot, etc
 
-##### Mixins
+- **[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._
 
-- 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`.
+- <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.
 
-##### Variables
+- Added two new `.display-*` heading sizes, `.display-5` and `.display-6`.
 
-- 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`.
+- **Links are underlined by default** (not just on hover), unless they're part of specific components.
 
-### JavaScript
+- **Redesigned tables** to refresh their styles and rebuild them with CSS variables for more control over styling.
 
-- 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`.
+- <span class="badge bg-danger">Breaking</span> Nested tables do not inherit styles anymore.
 
-### Sass
+- <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`).
 
-- Renamed `scale-color()` function to `shift-color()` to avoid collision with Sass's own color scaling function.
+- <span class="badge bg-danger">Breaking</span> 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.
 
-### Utilities
+- Split table cell padding variables into `-y` and `-x`.
 
-- Added new `.translate-middle-x` & `.translate-middle-y` utilities to horizontally or vertically center absolute/fixed positioned elements.
+- <span class="badge bg-danger">Breaking</span> Dropped `.pre-scrollable` class. [See #29135](https://github.com/twbs/bootstrap/pull/29135)
 
-### Components
+- <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)
 
-#### Breadcrumbs
+- <span class="badge bg-danger">Breaking</span> Dropped `.text-justify` class. [See #29793](https://github.com/twbs/bootstrap/pull/29793)
 
-- 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.
+- Reset default horizontal `padding-left` on `<ul>` and `<ol>` elements from browser default `40px` to `2rem`.
 
-#### Toasts
+- 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)
 
-- Toasts can now be [positioned]({{< docsref "/components/toasts#placement" >}}) in a `.toast-container` with the help of [positioning utilities]({{< docsref "/utilities/position" >}}).
+## RTL
 
-## v5.0.0-alpha3
+- 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`.
 
-### Browser support
+## Forms
 
-- Dropped support for Microsoft Edge Legacy. See [here](#browser-support-1) for the previous browser support changes.
+- **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" >}})
 
-### Sass
+- <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`.
 
-- 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).
+- <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.
 
-### Reboot
+- 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.
 
-- 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)
+- <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`.
 
-### Buttons
+- <span class="badge bg-danger">Breaking</span> Form labels now require `.form-label`.
 
-- [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`.
+- <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.
 
-### Forms
+- Validation icons are no longer applied to `<select>`s with `multiple`.
 
-- 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.
+- Rearranged source Sass files under `scss/forms/`, including input group styles.
 
-### Utilities
+<hr class="my-5">
 
-- **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).
+## Components
 
-## v5.0.0-alpha2
+- 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).
 
-### Sass
+### Accordion
 
-- 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).
+- Added [new accordion component]({{< docsref "/components/accordion" >}}!
 
-### Docs
+### Alerts
 
-- 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.
+- Alerts now have [examples with icons]({{< docsref "/components/alerts#icons" >}}).
 
-### Layout
+- Removed custom styles for `<hr>`s in each alert since they already use `currentColor`.
 
-- 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.
+### Badges
 
-### Reboot
+- <span class="badge bg-danger">Breaking</span> Dropped all `.badge-*` color classes for background utilities (e.g., use `.bg-primary` instead of `.badge-primary`).
 
-- Updated `th` styling to use a default `null` value for `font-weight` and inherit `text-align` instead of setting explicitly.
+- <span class="badge bg-danger">Breaking</span> Dropped `.badge-pill`—use the `.rounded-pill` utility instead.
 
-### Colors
+- <span class="badge bg-danger">Breaking</span> Removed hover and focus styles for `<a>` and `<button>` elements.
 
-- 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`).
+- Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`.
 
-### Forms
+### Breadcrumbs
 
-- [#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.
+- Simplified the default appearance of breadcrumbs by removing `padding`, `background-color`, and `border-radius`.
 
-### Components
+- Added new CSS custom property `--bs-breadcrumb-divider` for easy customization without needing to recompile CSS.
 
-#### Badges
+### Buttons
 
-- [#31132](https://github.com/twbs/bootstrap/pull/31132): Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`.
+- <span class="badge bg-danger">Breaking</span> **[Toggle buttons](http://getbootstrap.com/docs/5.0/forms/checks-radios/#toggle-buttons), with checkboxes or radios, no longer require JavaScript and have new markup.** We no long 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._
 
-#### Buttons
+- <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.](http://getbootstrap.com/docs/5.0/components/buttons/#block-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.
+- Updated our `button-variant()` and `button-outline-variant()` mixins to support additional parameters.
 
-#### Carousel
+- Updated buttons to ensure increased contrast on hover and active states.
 
-- 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).
+- Disabled buttons now have `pointer-events: none;`.
 
-#### Close button
+### Card
 
-- Renamed `.close` to `.btn-close` for a less generic name.
-- Close buttons now use a `background-image` (embedded SVG) instead of a `&times;` 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.
+- <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).
 
-#### Collapse
+- <span class="badge bg-danger">Breaking</span> Dropped `.card-columns` in favor of Masonry. [See #28922](https://github.com/twbs/bootstrap/pull/28922).
 
-- [#31346](https://github.com/twbs/bootstrap/pull/31346): Removed scroll anchoring for accordions.
+- <span class="badge bg-danger">Breaking</span> Replaced the `.card` based accordion with a [new Accordion component]({{< docsref "/components/accordion" >}}).
 
-#### Dropdowns
+### Carousel
 
-- 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.
+- Added new [`.carousel-dark` variant]({{< docsref "/components/carousel#dark-variant" >}}) for dark text, controls, and indicators (great for lighter backgrounds).
 
-#### Navs
+- Replaced chevron icons for carousel controls with new SVGs from [Bootstrap Icons]({{< param "icons" >}}).
 
-- [#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.
+### Close buttton
 
-#### Pagination
+- <span class="badge bg-danger">Breaking</span> Renamed `.close` to `.btn-close` for a less generic name.
 
-- Added `transition`s to pagination links. [See #31396](https://github.com/twbs/bootstrap/pull/31396).
+- Close buttons now use a `background-image` (embedded SVG) instead of a `&times;` in the HTML, allowing for easier customization without the need to touch your markup.
 
-#### Popovers
+- Added new `.btn-close-white` variant that uses `filter: invert(1)` to enable higher contrast dismiss icons against darker backgrounds.
 
-- Renamed `whiteList` option to `allowList`.
+### Collapse
 
-#### Toasts
+- Removed scroll anchoring for accordions.
 
-- [#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.
+### Dropdowns
 
-#### Tooltips
+- Added new `.dropdown-menu-dark` variant and associated variables for on-demand dark dropdowns.
 
-- Renamed `whiteList` option to `allowList`.
+- Added new variable for `$dropdown-padding-x`.
 
-### Helpers
+- Darkened the dropdown divider for improved contrast.
 
-- 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()`.
+- <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.
 
-### Utilities
+- 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.
 
-- [#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" >}}).
+- <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.
 
-## v5.0.0-alpha1
+- Dropdowns now support `.dropdown-item`s wrapped in `<li>`s.
 
-### Browser support
+### Jumbotron
 
-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:
+- <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/5.0/examples/jumbotron/)
 
-- 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
+### List group
 
-### Sass
+- Added new [`.list-group-numbered` modifier]({{< docsref "/components/list-group#numbered" >}}) to list groups.
 
-Changes to our source Sass files and compiled CSS.
+### Navs and tabs
 
-- 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)
+- Added new `null` variables for `font-size`, `font-weight`, `color`, and `:hover` `color` to the `.nav-link` class.
 
-### JavaScript
+### Navbars
 
-Changes to our source and compiled JavaScript files.
+- <span class="badge bg-danger">Breaking</span> Navbars now require a container within (to drastically simplify spacing requirements and CSS required).
 
-- Dropped jQuery dependency and rewrote plugins to be in regular JavaScript.
-- Removed underscore from public static methods like `_getInstance()` → `getInstance()`.
+### Offcanvas
 
-### Color system
+- Added the new [offcanvas component]({{< docsref "/components/offcanvas" >}}).
 
-We've updated the color system that powers Bootstrap to improve color contrast and provide a much more extensive set of colors.
+### Pagination
 
-- 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.
+- Pagination links now have customizable `margin-left` that are dynamically rounded on all corners when separated from one another.
 
-### Grid and layout
+- Added `transition`s to pagination links.
 
-Changes to any layout tools and our grid system.
+### Popovers
 
-- Dropped the `.media` component as it can be built with utility classes. [See #28265](https://github.com/twbs/bootstrap/pull/28265) and the [flex utilities page for an example]({{< docsref "/utilities/flex#media-object" >}}).
-- 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.
-- Removed `.no-gutters` in favor of new gutter spacing classes. Use `.g-0` instead. [Read the gutter docs for more details.]({{< docsref "/layout/gutters" >}})
+- <span class="badge bg-danger">Breaking</span> Renamed `.arrow` to `.popover-arrow` in our default popover template.
 
-### Content, Reboot, etc
+- Renamed `whiteList` option to `allowList`.
 
-Changes to Reboot, typography, tables, and more.
+### Spinners
 
-- [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)
-- `.form-text` no longer sets `display`, but does set `color` and `font-size`. So instead of `<small class="form-text text-muted">` you should now use `<div class="form-text">`.
-
-### Components
+- Spinners now honor `prefers-reduced-motion: reduce` by slowing down animations. [See #31882](https://github.com/twbs/bootstrap/pull/31882).
 
-- 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).
+- Improved spinner vertical alignment.
 
-#### Disabled states
+### Toasts
 
-- 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).
+- Toasts can now be [positioned]({{< docsref "/components/toasts#placement" >}}) in a `.toast-container` with the help of [positioning utilities]({{< docsref "/utilities/position" >}}).
 
-#### Alerts
+- Changed default toast duration to 5 seconds.
 
-- Removed auto-darkening of `<hr>` elements in `.alert-*` class variants. `<hr>`s use `rgba()` for their color, so these should naturally blend anyway.
+- Removed `overflow: hidden` from toasts and replaced with proper `border-radius`s with `calc()` functions.
 
-#### Badges
+### Tooltips
 
-Badges were overhauled to better differentiate themselves from buttons and to better utilize utility classes.
+- <span class="badge bg-danger">Breaking</span> Renamed `.arrow` to `.tooltip-arrow` in our default tooltip template.
 
-- 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`.
+- <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.
 
-#### Buttons
+- <span class="badge bg-danger">Breaking</span> Renamed `whiteList` option to `allowList`.
 
-- 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).
+## Utilities
 
-#### Cards
+- <span class="badge bg-danger">Breaking</span> Renamed several utilities to use logical property names instead of directoinal 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`.
 
-- 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.
+- <span class="badge bg-danger">Breaking</span> Disabled negative margins by default.
 
-#### Jumbotron
+- Added new `.bg-body` class for quickly setting the `<body>`'s background to additional elements.
 
-- The jumbotron component is removed in favor of utility classes like `.bg-light` for the background color and `.p-*` classes to control padding.
+- Added new [position utilities]({{< docsref "/utilities/position#arrange-elements" >}}) for `top`, `right`, `bottom`, and `left`. Values include `0`, `50%`, and `100%` for each property.
 
-#### Navbars
+- Added new `.translate-middle-x` & `.translate-middle-y` utilities to horizontally or vertically center absolute/fixed positioned elements.
 
-- 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.
+- Added new [`border-width` utilities]({{< docsref "/utilities/borders#border-width" >}}).
 
-#### Pagination
+- <span class="badge bg-danger">Breaking</span> Renamed `.text-monospace` to `.font-monospace`.
 
-- Pagination links now have customizable `margin-left` that are dynamically rounded on all corners when separated from one another.
+- <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.
 
-#### Popovers
+- 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 `.arrow` to `.popover-arrow`
+- <span class="badge bg-danger">Breaking</span> Renamed `.font-weight-*` utilities as `.fw-*` for brevity and consistency.
 
-#### Tooltips
+- <span class="badge bg-danger">Breaking</span> Renamed `.font-style-*` utilities as `.fst-*` for brevity and consistency.
 
-- Renamed `.arrow` to `.tooltip-arrow`
+- Added `.d-grid` to display utilities and new `gap` utilities (`.gap`) for CSS Grid and flexbox layouts.
 
-### Accessibility
+- <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).
 
-- 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).
+- Added new `line-height` utilities: `.lh-1`, `.lh-sm`, `.lh-base` and `.lh-lg`. See [here]({{< docsref "/utilities/text#line-height" >}}).
 
-### Utilities
+- Moved the `.d-none` utility in our CSS to give it more weight over other display utilities.
 
-### Grid
+- Extended the `.visually-hidden-focusable` helper to also work on containers, using `:focus-within`.
 
-- 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).
+## Helpers
 
-### Misc
+- <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" >}}).
 
-- 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.
+- <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.
 
-### Docs
+## JavaScript
 
-- Removed "Wall of browser bugs" page because it has become obsolete
-- Switched from Jekyll to Hugo
+- **Dropped jQuery dependency** and rewrote plugins to be in regular JavaScript.
 
-### Build tools
+- <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`.
 
-- Updated all devDependencies
-- We support only the latest Node.js LTS releases which are 10 and 12 at the time of writing
+- **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()`.