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概述
The align-self CSS property aligns flex items of the current flex line overriding the align-items value. If any of the flex item's cross-axis margin is set to auto, then align-self is ignored.
| 初始值 | auto |
|---|---|
| 适用元素 | flex items, including in-flow pseudo-elements |
| 是否是继承属性 | 否 |
| 适用媒体 | visual |
| 计算值 | auto computes to itself on absolutely-positioned elements, and to the computed value of align-items on the parent (minus any legacy keywords) on all other boxes, or start if the box has no parent. Its behavior depends on the layout model, as described for justify-self. Otherwise the specified value. |
| 是否适用于 CSS 动画 | 否 |
| 正规顺序 | the unique non-ambiguous order defined by the formal grammar |
See Using CSS flexible boxes for more properties and information.
语法
Formal syntax: auto | flex-start | flex-end | center | baseline | stretch
align-self: auto align-self: flex-start align-self: flex-end align-self: center align-self: baseline align-self: stretch align-self: inherit
取值
auto- Computes to parent's
align-itemsvalue orstretchif the element has no parent. flex-start- The cross-start margin edge of the flex item is flushed with the cross-start edge of the line.
flex-end- The cross-end margin edge of the flex item is flushed with the cross-end edge of the line.
center- The flex item's margin box is centered within the line on the cross-axis. If the cross-size of the item is larger than the flex container, it will overflow equally in both directions.
baseline- All flex items are aligned such that their baselines align. The item with the largest distance between its cross-start margin edge and its baseline is flushed with the cross-start edge of the line.
stretch- Flex items are stretched such as the cross-size of the item's margin box is the same as the line while respecting width and height constraints.
例子
规范
| Specification | Status | Comment |
|---|---|---|
| CSS Box Alignment Module align-self |
Working Draft |
浏览器兼容性
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 21.0-webkit 36.0 |
18.0 (18.0) (behind a pref) [1] 20.0 (20.0) |
11.0 | 12.10 | 未实现 |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | ? | ? | 未实现 | 12.10 | 未实现 |
[1] Firefox supports only single-line flexbox until Firefox 28. To activate flexbox support, for Firefox 18 and 19, the user has to change the about:config preference "layout.css.flexbox.enabled" to true.