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---
title: Object.prototype.unwatch()
slug: Web/JavaScript/Reference/Global_Objects/Object/unwatch
translation_of: Archive/Web/JavaScript/Object.unwatch
---
<div>{{JSRef}}</div>
<div class="warning">
<p><strong>警告 :</strong> 请尽量避免使用 unwatch() 和 {{jsxref("Object.prototype.watch", "watch()")}} . 这两个方法仅在 Gecko 中实现 , 并且他们过去主要作调试用. 另外, 使用 watchpoints 对性能有一系列的副面影响 ，特别是当使用全局对象，如 <code>window</code>. 你应该使用 <a href="/en-US/docs/Web/JavaScript/Guide/Working_with_Objects#Defining_getters_and_setters">setters and getters</a> 或 proxies 来替代. 查阅 {{anch("Browser compatibility")}} 以获取更多信息.</p>
</div>
<p><code><strong>unwatch()</strong></code> 删除一个 {{jsxref("Object.prototype.watch", "watch()")}} 设置的 watchpoint.</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox"><code><var>obj</var>.unwatch(<var>prop</var>)</code></pre>
<h3 id="参数">参数</h3>
<dl>
<dt><code>prop</code></dt>
<dd>想要停止监视的对象的属性名</dd>
</dl>
<h2 id="描述">描述</h2>
<p>JavaScript调试器具有类似的功能，以及其他调试选项。有关调试器的信息 <a href="/en-US/docs/Venkman">Venkman</a>.</p>
<p>默认地, 这个方法 被每一个 {{jsxref("Object")}} 的子类继承 </p>
<div class="note">
<p><strong>Note:</strong> The reason for <code>unwatch()</code> to take the property name <em>prop</em> as its only parameter is due to the "single handler allowing" behavior of the {{jsxref("Object.watch", "watch()")}} method.</p>
</div>
<h2 id="例子">例子</h2>
<p>See {{jsxref("Object.watch", "watch()")}}.</p>
<h2 id="说明">说明</h2>
<p>Not part of any specifications. Implemented in JavaScript 1.2.</p>
<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>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</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>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Mobile</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
<td>{{CompatNo}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="Compatibility_notes">Compatibility notes</h2>
<ul>
<li>从 Firefox 23 ({{bug(903332)}}) 开始, 在 {{domxref("Document")}} 对象上调用 <code>unwatch()</code> 抛出 {{jsxref("TypeError")}} . This regression has been fixed with Firefox 27.</li>
</ul>
<h2 id="相关链接">相关链接</h2>
<ul>
<li>{{jsxref("Object.watch()")}}</li>
</ul>
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