Bootstrap v4.0.0-alpha.4 发布了，这个版本主要的变化是用一个小的"alpha patch" 来命名一个没有任何JS文件的npm包，并且对我们的 CSS 和 docs 进行了一些小小的改变。

CSS

• #20130: Make .bg-inverse use the background variant mixin for proper text color.

• #20333: Update progress bar to use $progress-border-radius instead of $border-radius.

• #20387: Use $input-border-radius-* variables on .input-group-addons instead of $border-radius.

• #20413: Remove unused $size parameter from grid mixin.

• #20447: Make cards block level in columns.

• #20469: Remove non ASCII character from table CSS.

• #20485: Use rem units on Alert‘s dismiss icon.

• #20545: Removed the inconsistent margins between flex and non-flex modes from .media. Replaced them with spacing utils in our docs examples.

• #20597: Removed unused variables in some grid mixins.

• #20619: Ensure hover effects work on text utilities.

• #20629: Update form checkbox and radio styles for validation; tweak docs to match.

Docs

• #20282: Fix typo in Migration docs about Reboot and unit changes.

• #20341: Update static tooltip demo in docs to use proper class names.

• #20417: Import the flexbox utilities into the docs flex stylesheet to fix broken flex utility docs.

• #20475: Update flexbox grid docs to show auto-sizing of sibling columns when using a centered, odd-count column.

• #20476: Remove CDN coming soon notice from docs page.

• #20484, #20489: Fix segmented button in input group examples.

• #20505: Update migration guidelines for renamed table variants.

• #20519: Add migration note about .panel-group.

• #20551: Ensure progress component table of contents renders.

• #20553: Properly size split dropup variation with modifier class.

Packaging

• #20385, #20418: Fix for npm not having a JS directory.

• #20394: Point package.json‘s main to proper JS file for package managers.

稿源：勤快学http://qkxue.net

Bootstrap v4.0.0-alpha.4 发布