---
title: WindowOrWorkerGlobalScope.crossOriginIsolated
slug: Web/API/WindowOrWorkerGlobalScope/crossOriginIsolated
translation_of: Web/API/WindowOrWorkerGlobalScope/crossOriginIsolated
---
<div>{{APIRef()}}{{SeeCompatTable}}</div>

<p><code><strong>crossOriginIsolated</strong></code> 是 {{domxref("WindowOrWorkerGlobalScope")}} 的一个只读属性，返回一个布尔值，该值指示是否可以通过{{domxref("Window.postMessage()")}}调用发送 {{jsxref("SharedArrayBuffer")}}。</p>

<p>该值取决于响应中存在的{{httpheader("Cross-Origin-Opener-Policy")}} 和{{httpheader("Cross-Origin-Embedder-Policy")}} 头。</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">var <em>myCrossOriginIsolated</em> = self.crossOriginIsolated; // 或直接 crossOriginIsolated
</pre>

<h3 id="类型">类型</h3>

<p>布尔类型</p>

<h2 id="示例">示例</h2>

<pre class="brush: js">if(crossOriginIsolated) {
  // post SharedArrayBuffer
} else {
  // Do something else
}
</pre>

<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("HTML WHATWG")}}</td>
   <td></td>
   <td>Not yet merged into the spec</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>



<p>{{Compat("api.WindowOrWorkerGlobalScope.crossOriginIsolated")}}</p>

<h2 id="参见">参见</h2>

<ul>
 <li><a href="/en-US/docs/Web/API/ServiceWorker_API">Service Workers</a></li>
 <li><a href="/en-US/docs/Web/API/Web_Workers_API">Web Workers</a></li>
</ul>