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+---
+title: ServiceWorkerRegistration.unregister()
+slug: Web/API/ServiceWorkerRegistration/unregister
+translation_of: Web/API/ServiceWorkerRegistration/unregister
+---
+<div>{{SeeCompatTable}}{{APIRef("Service Workers API")}}</div>
+
+<p>{{domxref("ServiceWorkerRegistration")}} 接口的 <code><strong>unregister</strong></code> 方法用于取消对service worker的注册并返回一个 {{jsxref("Promise")}}。没有找到注册时，这个 promise 返回 <code>false</code> ，否则，不论取消成功与否都返回 <code>true</code> （当其他人在同一作用域调用了 {{domxref("ServiceWorkerContainer.register")}} 可能取消失败）service worker 会在取消注册前完成一切正在进行的操作。</p>
+
+<div class="note">
+<p><strong>Note</strong>: 这一特性同样适用于 <a href="/en-US/docs/Web/API/Web_Workers_API">Web Workers</a>.</p>
+</div>
+
+<h2 id="Syntax" name="Syntax" style="line-height: 30px; font-size: 2.14285714285714rem;">语法</h2>
+
+<pre class="syntaxbox" style="font-size: 14px;">ServiceWorkerRegistration.unregister().then(function(boolean) {
+});</pre>
+
+<h3 id="参数" style="line-height: 30px; font-size: 2.14286rem;">参数</h3>
+
+<p>None.</p>
+
+<h3 id="返回">返回</h3>
+
+<p>Promise 返回一个bool值表示 service worker 是否被取消注册。</p>
+
+<h2 id="例子" style="line-height: 30px; font-size: 2.14285714285714rem;">例子</h2>
+
+<p>下面的简单例子中注册了一个service worker，然后立即取消了：</p>
+
+<pre class="brush: js">if ('serviceWorker' in navigator) {
+  navigator.serviceWorker.register('/sw-test/sw.js', {scope: 'sw-test'}).then(function(registration) {
+    // registration worked
+    console.log('Registration succeeded.');
+    registration.unregister().then(function(boolean) {
+      // if boolean = true, unregister is successful
+    });
+  }).catch(function(error) {
+    // registration failed
+    console.log('Registration failed with ' + error);
+  });
+};</pre>
+
+<h2 id="规范" style="line-height: 30px; font-size: 2.14285714285714rem;">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col"><font face="Open Sans, sans-serif"><span style="font-weight: normal;">Specification</span></font></th>
+   <th scope="col"><font face="Open Sans, sans-serif"><span style="font-weight: normal;">Status</span></font></th>
+   <th scope="col"><font face="Open Sans, sans-serif"><span style="font-weight: normal;">Comment</span></font></th>
+  </tr>
+  <tr>
+   <td>{{SpecName('Service Workers', '#service-worker-registration-unregister-method', 'ServiceWorkerRegistration.unregister()')}}</td>
+   <td>{{Spec2('Service Workers')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("api.ServiceWorkerRegistration.unregister")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/ServiceWorker_API/Using_Service_Workers">Using Service Workers</a></li>
+ <li><a href="https://github.com/mdn/sw-test">Service workers basic code example</a></li>
+ <li><a href="https://jakearchibald.github.io/isserviceworkerready/">Is ServiceWorker ready?</a></li>
+ <li>{{jsxref("Promise")}}</li>
+ <li><a href="/en-US/docs/Web/Guide/Performance/Using_web_workers">Using web workers</a></li>
+</ul>