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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: 'Element: contextmenu event'
+slug: Web/API/Element/contextmenu_event
+tags:
+ - API
+ - DOM
+ - 上下文
+ - 上下文菜单
+ - 事件
+ - 元素
+ - 右击
+ - 右键单击
+ - 按钮
+ - 菜单
+ - 鼠标
+translation_of: Web/API/Element/contextmenu_event
+---
+<div>{{APIRef}}</div>
+
+<p><span class="seoSummary"><strong><code>contextmenu</code></strong> 事件会在用户尝试打开上下文菜单时被触发。该事件通常在鼠标点击右键或者按下键盘上的菜单键时被触发,如果使用菜单键,该上下文菜单会被展示 到所聚焦元素的左下角,但是如果该元素是一棵DOM树的话,上下文菜单便会展示在当前这一行的左下角。</span></p>
+
+<p>任何没有被禁用的鼠标右击事件 (通过调用事件的 {{domxref("Event.preventDefault", "preventDefault()")}} 方法) 将会使得 <code>contextmenu</code> 事件在目标元素上被触发。</p>
+
+<table class="properties">
+ <tbody>
+ <tr>
+ <th>Bubbles(冒泡)</th>
+ <td>Yes</td>
+ </tr>
+ <tr>
+ <th>Cancelable(可撤销)</th>
+ <td>Yes</td>
+ </tr>
+ <tr>
+ <th>Interface(接口)</th>
+ <td>{{DOMxRef("MouseEvent")}}</td>
+ </tr>
+ <tr>
+ <th>Event handler property(事件处理器)</th>
+ <td>{{domxref("GlobalEventHandlers.oncontextmenu", "oncontextmenu")}}</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="实例">实例</h2>
+
+<p>在下面的例子中,第一段内容被触发的 <code>contextmenu</code> 事件的默认行为被 <code>preventDefault()</code> 取消了,因此,在第一段右击鼠标时什么也不会发生,但是右键单击第二段内容时,则会出现标准的菜单内容,与平时右击普通页面出现的菜单内容一致。</p>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;p id="noContextMenu"&gt;这个段落右键菜单已被禁用。&lt;/p&gt;
+&lt;p&gt;但是这个段落没有被禁用。&lt;/p&gt;</pre>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<pre class="brush: js">noContext = document.getElementById('noContextMenu');
+
+noContext.addEventListener('contextmenu', e =&gt; {
+ e.preventDefault();
+});
+</pre>
+
+<h3 id="Result">Result</h3>
+
+<p>{{EmbedLiveSample("Examples")}}</p>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+ <tr>
+ <th scope="col">规范</th>
+ <th scope="col">状态</th>
+ <th scope="col">说明</th>
+ </tr>
+ </thead>
+ <tbody>
+ <tr>
+ <td>{{ SpecName('HTML WHATWG', 'indices.html#event-contextmenu', 'contextmenu')}}</td>
+ <td>{{Spec2('HTML WHATWG')}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{Compat("api.Element.contextmenu_event")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Learn/JavaScript/Building_blocks/Events">Introduction to events</a></li>
+ <li>{{event("auxclick")}}</li>
+ <li>{{event("click")}}</li>
+ <li>{{event("dblclick")}}</li>
+ <li>{{event("mousedown")}}</li>
+ <li>{{event("mouseup")}}</li>
+ <li>{{event("pointerdown")}}</li>
+ <li>{{event("pointerup")}}</li>
+</ul>