flex-shrink

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

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。

css

flex-shrink: 2;
flex-shrink: 0.6;

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

初始值	`1`
适用元素	flex items, including in-flow pseudo-elements
是否是继承属性	否
计算值	as specified
动画类型	a number

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

flex-shrink = 
  <number [0,∞]>

示例

HTML

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

css

#content {
  display: flex;
  width: 500px;
}

#content div {
  flex-basis: 120px;
  border: 3px solid rgba(0, 0, 0, 0.2);
}

.box {
  flex-shrink: 1;
}

.box1 {
  flex-shrink: 2;
}

结果

规范

Specification
CSS Flexible Box Layout Module Level 1 # flex-shrink-property

浏览器兼容性

BCD tables only load in the browser

参考

使用 CSS 弹性盒子