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---
title: WakeLock.request()
slug: Web/API/WakeLock/request
translation_of: Web/API/WakeLock/request
---
<p>{{APIRef("Screen Wake Lock API")}}{{SeeCompatTable}}{{securecontext_header}}</p>
<p><span class="seoSummary"><strong><code>WakeLock.request()</code></strong> 方法用来获取屏幕唤醒锁定权限，防止屏幕变暗、关闭或展示屏幕保护程序。</span></p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox notranslate"><em>WakeLock</em>.request(<var>wakeLockType</var>)</pre>
<h3 id="参数">参数</h3>
<dl>
<dt><code><var>wakeLockType</var></code></dt>
<dd>唤醒锁定类型，目前必须传 <code>"screen"</code> 。</dd>
</dl>
<h3 id="返回值">返回值</h3>
<p>决议为 {{DOMxRef("WakeLockSentinel")}} 的 {{JSxRef("Promise")}}。</p>
<h3 id="异常">异常</h3>
<dl>
<dt><code>NotAllowedError</code></dt>
<dd>当唤醒锁定不可用的时候抛出，例如在：
<ul>
<li>由于屏幕唤醒锁定策略，Document 不允许使用屏幕唤醒锁定。</li>
<li>Document 不完全激活。</li>
<li>Document 被隐藏。</li>
<li>{{Glossary("User Agent")}} 无法获取平台的唤醒锁定。</li>
</ul>
</dd>
</dl>
<h2 id="示例">示例</h2>
<p>以下示例获取屏幕唤醒锁定并在 10 分钟后释放它：</p>
<pre class="notranslate">function tryKeepScreenAlive(minutes) {
navigator.wakeLock.request("screen").then(lock => {
setTimeout(() => lock.release(), minutes * 60 * 1000);
});
}
tryKeepScreenAlive(10);
</pre>
<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">Comment</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="https://w3c.github.io/screen-wake-lock/#dom-wakelock-request">Screen Wake Lock API</a></td>
<td>Editor's Draft</td>
<td>Initial specification.</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
<p>{{Compat("api.WakeLock.request")}}</p>
<h2 id="相关链接">相关链接</h2>
<ul>
<li>{{DOMxRef("WakeLock")}}</li>
<li>{{DOMxRef("Navigator.wakeLock")}}</li>
</ul>
<p>
<audio style="display: none;"></audio>
</p>
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