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---
title: selectstart
slug: Web/API/Document/selectstart_event
tags:
- Selection
- Selection API
- events
translation_of: Web/API/Document/selectstart_event
---
<div>
<p><a href="https://developer.mozilla.org/en-US/docs/Web/API/Selection_API">Selection API</a> 的 <code><strong>selectstart</strong></code><strong> </strong>事件在用户开始一个新的选择时候触发。</p>
<p>如果事件被取消，选择将不被触发。</p>
</div>
<table class="standard-table">
<tbody>
<tr>
<td>Bubbles</td>
<td>Yes</td>
</tr>
<tr>
<td>Cancelable</td>
<td>Yes</td>
</tr>
<tr>
<td>Target objects</td>
<td>{{domxref("Document")}}</td>
</tr>
<tr>
<td>Interface</td>
<td>{{domxref("Event")}}</td>
</tr>
</tbody>
</table>
<h2 id="例子">例子</h2>
<pre class="brush: js">document.addEventListener("selectstart", function() {
console.log('Selection started');
}, false);
</pre>
<h2 id="继承">继承</h2>
<p><code>selectstart</code> 事件实现{{domxref("Event")}} 接口. 你可以使用此界面上定义的属性和方法。</p>
<p>{{InheritanceDiagram('','','', 'Event')}}</p>
<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('Selection API', '#selectstart-event', 'selectstart')}}</td>
<td>{{Spec2('Selection API')}}</td>
<td>Initial definition.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
{{Compat("api.Document.selectstart_event")}}
<h2 id="参见">参见</h2>
<ul>
<li>{{domxref("GlobalEventHandlers.onselectstart")}}</li>
</ul>
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