files/zh-cn/web/css/flex-shrink/index.html


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---
title: flex-shrink
slug: Web/CSS/flex-shrink
tags:
  - CSS
  - CSS Property
  - CSS 属性
  - Reference
  - 参考
  - 弹性盒
translation_of: Web/CSS/flex-shrink
---
<div>{{ CSSRef}}</div>

<p><a href="/zh-CN/docs/Web/CSS">CSS</a> <strong><code>flex-shrink</code></strong> 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。</p>

<pre class="brush: css">flex-shrink: 2;
flex-shrink: 0.6;

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

<p>{{cssinfo}}</p>

<p>更多属性和定义请参见<a href="/zh-CN/docs/Web/CSS/CSS_Flexible_Box_Layout/Using_CSS_flexible_boxes">使用 CSS 弹性盒子</a></p>

<h2 id="语法">语法</h2>

<p><code>flex-shrink</code> 属性只能是一个 <code><a href="https://developer.mozilla.org/zh-CN/docs/Web/CSS/flex-shrink$edit#&lt;number>">&lt;number&gt;</a>。</code></p>

<h3 id="取值">取值</h3>

<dl>
 <dt><code>&lt;number</code>&gt;</dt>
 <dd>负值是不被允许的。参考 {{cssxref("&lt;number&gt;")}}。</dd>
 <dt>
 <h3 id="Formal_syntax">Formal syntax</h3>

 {{csssyntax}}
 </dt>
</dl>

<h2 id="示例">示例</h2>

<h3 id="HTML">HTML</h3>

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

<h3 id="CSS">CSS</h3>

<pre class="brush: 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;
}</pre>

<h3 id="结果">结果</h3>

<p>{{EmbedLiveSample('示例', '500px', '300px', '', 'Web/CSS/flex-shrink')}}</p>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th>Specification</th>
   <th>Status</th>
   <th>Comment</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{ SpecName('CSS3 Flexbox', '#flex-shrink', 'flex-shrink') }}</td>
   <td>{{ Spec2('CSS3 Flexbox') }}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

{{Compat("css.properties.flex-shrink")}}

<h2 id="参考">参考</h2>

<ul>
 <li><a href="/zh-CN/docs/Web/CSS/CSS_Flexible_Box_Layout/Using_CSS_flexible_boxes" title="使用 CSS 弹性盒子">使用 CSS 弹性盒子</a></li>
</ul>