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+---
+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>