---
title: back()
slug: Web/API/History/back
tags:
  - HTML5
  - History
translation_of: Web/API/History/back
---
<p>{{APIRef("DOM")}}</p>

<p><code>back()</code>方法会在会话历史记录中向后移动一页。如果没有上一页，则此方法调用不执行任何操作。</p>

<h2 id="语法">语法</h2>

<pre class="brush: js line-numbers language-js"><code class="language-js">window<span class="punctuation token">.</span>history<span class="punctuation token">.</span><span class="function token">back</span><span class="punctuation token">(</span><span class="punctuation token">)</span></code></pre>

<h2 id="示例">示例</h2>

<p>下述简短示例使页面上的按钮导航页面至会话历史的后一项。</p>

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

<pre class="brush: html">&lt;button id="go-back"&gt;Go back!&lt;/button&gt;</pre>

<h3 id="JavaScript">JavaScript</h3>

<pre class="brush: js">window.onload = function(e) {
  document.getElementById('go-back').addEventListener('click', e =&gt; {
    window.history.back();
  })
}</pre>

<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("HTML WHATWG", "browsers.html#history", "History")}}</td>
   <td>{{Spec2("HTML WHATWG")}}</td>
   <td>No change from {{SpecName("HTML5 W3C")}}.</td>
  </tr>
  <tr>
   <td>{{SpecName("HTML5 W3C", "browsers.html#history", "History")}}</td>
   <td>{{Spec2("HTML5 W3C")}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>



<p>{{Compat("api.History.back")}}</p>