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1.4 KiB
| layout | title |
|---|---|
| page | Migrating to v4.x.x |
Summary
For a broader overview, see what's new in the v4.0.0 release announcement.
- Dropped IE8 support—v4 is now only IE9+. For sites needing IE8, use v3.
- Switched from
pxtoremas our primary unit in CSS. - Media queries are now in
ems. - Global font-size increased from
14pxto16px. - Dropped panels, thumbnails, and wells for a new component, cards.
- Switched from LESS to SCSS for our source CSS files.
- Added a new grid tier for ~
480pxand below. - Dropped Glyphicons icon font.
- Refactored nearly all components to use more unnested classes instead of children selectors.
Major class changes
This table shows the style changes between v3.x.x and v4.0.0.
| Bootstrap 3.x.x | Bootstrap 4.0.0 |
|---|---|
What's new
We've added new components and changed some existing ones. Here are the new or updated styles.
| Component | Description |
|---|---|
| Cards | New, more flexible component to replace v3's panels, thumbnails, and wells. |
| New navbar | Replaces the previous navbar with a new, simpler component. |
| New progress bars | Replaces the old .progress with a real <progress> element. |
What's removed
The following components have been removed in v4.0.0.
| Component | Removed from 3.x.x | 4.0.0 Equivalent |
|---|---|---|