flex-shrink

CSS flex-shrink 属性指定了 flex 元素的收缩规则。flex 元素仅在默认宽度之和大于容器的时候才会发生收缩，其收缩的大小是依据 flex-shrink 的值。

flex-shrink: 2;
flex-shrink: 0.6;
/* Global values */
flex-shrink: inherit;
flex-shrink: initial;
flex-shrink: unset

更多属性和定义请参见使用 CSS 弹性盒子

语法

flex-shrink 属性只能是一个 <number>。

取值

<number>

负值是不被允许的。参考 <number>。

Formal syntax

<number>

示例

HTML

<p>the width of content is 500px, flex-basic of flex item is 120px.</p>
<p>A, B, C are flex-shrink:1. D and E are flex-shrink:2</p>
<p>the width of D is not the same as A's</p>
<div id="content">
  <div class="box" style="background-color:red;">A</div>
  <div class="box" style="background-color:lightblue;">B</div>
  <div class="box" style="background-color:yellow;">C</div>
  <div class="box1" style="background-color:brown;">D</div>
  <div class="box1" style="background-color:lightgreen;">E</div>
</div>

CSS

#content {
  display: flex;
  width: 500px;
}
#content div {
  flex-basis: 120px;
  border: 3px solid rgba(0,0,0,.2);
}
.box {
  flex-shrink: 1;
}
.box1 {
  flex-shrink: 2;
}

结果

规范

浏览器兼容性

[1] Firefox 仅支持单行 flexbox 直到 Firefox 28版本。To activate flexbox support, for Firefox 18 and 19, the user has to change the about:config preference "layout.css.flexbox.enabled" to true.

In addition to the unprefixed support, Gecko 48.0 (Firefox 48.0 / Thunderbird 48.0 / SeaMonkey 2.45) added support for a -webkit prefixed version of the property for web compatibility reasons behind the preference layout.css.prefixes.webkit, defaulting to false. Since Gecko 49.0 (Firefox 49.0 / Thunderbird 49.0 / SeaMonkey 2.46) the preference defaults to true.

[2] 在 Firefox 32 之前，Gecko不能将动画从0开始或停止在0(Spec,Demo).。

[3] Internet Explorer 10 使用 0 而不是 1 作为 flex-shrink 属性的初始值。A workaround is to always set an explicit value for flex-shrink. See Flexbug #6 for more info.

参考

• 使用 CSS 弹性盒子