v5 alpha 2 migration guide updates

site/content/docs/5.0/migration.md

@@ -11,17 +11,23 @@ toc: true
 
 ### Sass
 
-- "Screen reader" classes are now "visually hidden" classes.
-  - 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()`.
-- Add border width utility, see [31484](https://github.com/twbs/bootstrap/pull/31484)
+- Added default parameters to each `border-radius` mixin. See #31571.
+- Updated next breakpoint when targeting only the `xs` breakpoint. See #31500.
+- `box-shadow` mixins now allow `null` values and drop `none` from multiple arguments. See #30394.
 
 ### Docs
 
 - 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.
+- #3114: Improved form documentation with regards to accessibility.
+
+### Layout
+
+- Container horizontal padding updated to match the gutter size of `.row`s.
+- #31439: Removed `flex: 1 0 100%` from rows due to regressions in grid behavior.
 
 ### Reboot
 
@@ -36,17 +42,23 @@ toc: true
 
 ### Forms
 
-- Resized checks and radios to be `1em` instead of `1.25em` in an effort to make them scale better with custom `$font-size-base` values and more.
+- #31383: Resized checks and radios to be `1em` instead of `1.25em` in an effort to make them scale better with custom `$font-size-base` values and more.
 
 ### Components
 
-### Badges
+#### Badges
 
-- Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`.
+- #31132: Increased default padding for badges from `.25em`/`.5em` to `.35em`/`.65em`.
 
 #### Buttons
 
-- Disabled states of buttons are easier to customize thanks to additional arguments in the `button-variant()` mixin. [See #30639.](https://github.com/twbs/bootstrap/pull/30639)
+- [#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: Updated buttons to ensure increased contrast on hover and active states.
+
+#### Carousel
+
+- Replaced chevron icons for carousel controls with new SVGs from [Bootstrap Icons](http://icons.getbootstrap.com).
+- Added new [`.carousel-dark` variant]({{< docsref "/components/carousel/#dark-variant" >}}) for dark text, controls, and indicators (great for lighter backgrounds).
 
 #### Close button
 
@@ -55,9 +67,23 @@ toc: true
 - Added new variables to better control the customization.
 - Added new `.btn-close-white` variant that uses `backdrop-filter: invert(1)` to enable higher contrast dismiss icons against darker backgrounds.
 
+#### Collapse
+
+- #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
 
-- Added new `null` variables for `font-size`, `font-weight`, `color`, and `:hover` `color` to the `.nav-link` class.
+- #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.
 
 #### Popovers
 
@@ -65,8 +91,10 @@ toc: true
 
 #### Toasts
 
-- Made default toast duration 5 seconds.
-- Removed `overflow: hidden` from toasts and replaced with proper `border-radius`s with `calc()` functions.
+- #31155: Clear `timeout` before showing toasts.
+- #31109: Made default toast duration 5 seconds.
+- #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
 
@@ -79,6 +107,18 @@ toc: true
   - We've dropped the `.embed-responsive-item` and element group selector in favor of a simpler `.ratio > *` selector. No more class 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: 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: The `.d-none` utility was moved in our CSS to give it more weight over other display utilities.
 
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