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---
title: Storage.clear()
slug: Web/API/Storage/clear
translation_of: Web/API/Storage/clear
---
<p>{{APIRef("Web Storage API")}}</p>

<p><code>clear()</code> 是 {{domxref("Storage")}} 接口的一个方法,调用它可以清空存储对象里所有的键值。</p>

<h2 id="语法">语法</h2>

<pre class="brush: js"><em>storage</em>.clear();</pre>

<h3 id="参数">参数</h3>

<p><em>无。</em></p>

<h3 id="返回值">返回值</h3>

<p><em>无。</em></p>

<h2 id="示例">示例</h2>

<p>下面的函数在本地存储里面创建三个数据项,然后使用 <code>clear()</code> 把它们全部移除。</p>

<pre class="brush: js">function populateStorage() {
  localStorage.setItem('bgcolor', 'red');
  localStorage.setItem('font', 'Helvetica');
  localStorage.setItem('image', 'myCat.png');

  localStorage.clear();
}</pre>

<div class="note">
<p><strong>备注:</strong>一个实际的例子 <a href="https://github.com/mdn/web-storage-demo">Web Storage Demo</a></p>
</div>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('Web Storage', '#dom-storage-clear', 'clear()')}}</td>
   <td>{{Spec2('Web Storage')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

{{Compat("api.Storage.clear")}}

<h2 id="相关链接">相关链接</h2>

<p><a href="/zh-CN/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API">使用 Web Storage API</a></p>