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+---
+title: Performance.clearMarks()
+slug: Web/API/Performance/clearMarks
+translation_of: Web/API/Performance/clearMarks
+---
+<div>{{APIRef("User Timing API")}}</div>
+
+<p><strong><code>clearMarks()</code></strong> 这个方法可以从浏览器的performance entry 缓存中移除声明的标记。如果调用这个方法时没有传递参数， 则所有带有{{domxref("PerformanceEntry.entryType","entry type")}}这类标记的{{domxref("PerformanceEntry","performance entries")}} 将从 performance entry 缓存区中被移除。</p>
+
+<h2 id="用法">用法</h2>
+
+<pre class="syntaxbox"><em>performance</em>.clearMarks();
+<em>performance</em>.clearMarks(name);
+</pre>
+
+<h3 id="参数">参数</h3>
+
+<dl>
+ <dt>name {{optional_inline}}</dt>
+ <dd>{{domxref("DOMString")}} 表示时间戳的名字,如果没有提供这个参数， 则所有带有{{domxref("PerformanceEntry.entryType","entry type")}}这类标记的{{domxref("PerformanceEntry","performance entries")}} 将从 performance entry 缓存区中被移除。</dd>
+</dl>
+
+<h3 id="返回值">返回值</h3>
+
+<dl>
+ <dt>void</dt>
+ <dd> </dd>
+</dl>
+
+<h2 id="例子">例子</h2>
+
+<p>下面的例子演示<code>clearMarks() 的两种用法。</code></p>
+
+<pre class="brush: js">function clear_mark(name) {
+  if (performance.clearMarks === undefined) {
+    console.log("performance.clearMarks Not supported");
+    return;
+  }
+  //移除所有标记了此名称的peformance entry
+  performance.clearMarks(name);
+}
+function clear_all_marks() {
+  if (performance.clearMarks === undefined) {
+    console.log("performance.clearMarks Not supported");
+    return;
+  }
+  //从performance 缓冲区中移除所有标记的performance entry
+  performance.clearMarks();
+}
+</pre>
+
+<h2 id="说明">说明</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">说明</th>
+   <th scope="col">状态</th>
+   <th scope="col">备注</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('User Timing Level 2', '#dom-performance-clearmarks', 'clearMarks()')}}</td>
+   <td>{{Spec2('User Timing Level 2')}}</td>
+   <td>Clarifies <code>clearMarks()</code>.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('User Timing', '#dom-performance-clearmarks', 'clearMarks()')}}</td>
+   <td>{{Spec2('User Timing')}}</td>
+   <td>Basic definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<div>{{CompatibilityTable}}</div>
+
+<div id="compat-desktop">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Chrome</th>
+   <th>Edge</th>
+   <th>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatChrome(43.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>41</td>
+   <td>10</td>
+   <td>33</td>
+   <td>{{CompatNo}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Edge</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>Firefox OS</th>
+   <th>IE Phone</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(46.0)}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>42</td>
+   <td>42</td>
+   <td>10</td>
+   <td>33</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatChrome(46.0)}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>