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---
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>
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