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---
title: Response.ok
slug: Web/API/Response/ok
translation_of: Web/API/Response/ok
---
<div>{{APIRef("Fetch")}}{{SeeCompatTable}}</div>
<p>{{domxref("Response")}} 接口的只读属性 <code><strong>ok</strong></code> 包含一个布尔值，表明响应是否成功（状态码在200-299范围内）.</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">var <var>myOK</var> = <var>response</var>.ok;</pre>
<h3 id="值">值</h3>
<p> {{domxref("Boolean")}}.</p>
<h2 id="示例">示例</h2>
<p>In our <a href="https://github.com/mdn/fetch-examples/tree/gh-pages/fetch-response">Fetch Response example</a> (see <a href="http://mdn.github.io/fetch-examples/fetch-response/">Fetch Response live</a>) we create a new {{domxref("Request")}} object using the {{domxref("Request.Request","Request()")}} constructor, passing it a JPG path. We then fetch this request using {{domxref("GlobalFetch.fetch","fetch()")}}, extract a blob from the response using {{domxref("Body.blob")}}, create an object URL out of it using {{domxref("URL.createObjectURL")}}, and display this in an {{htmlelement("img")}}.</p>
<p>Note that at the top of the <code>fetch()</code> block we log the response <code>ok</code> value to the console.</p>
<pre class="brush: js">var myImage = document.querySelector('img');
var myRequest = new Request('flowers.jpg');
fetch(myRequest).then(function(response) {
console.log(response.ok); // returns true if the response returned successfully
response.blob().then(function(myBlob) {
var objectURL = URL.createObjectURL(myBlob);
myImage.src = objectURL;
});
});</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('Fetch','#dom-response-ok','ok')}}</td>
<td>{{Spec2('Fetch')}}</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.Response.ok")}}
<h2 id="相关链接">相关链接</h2>
<ul>
<li><a href="/en-US/docs/Web/API/ServiceWorker_API">ServiceWorker API</a></li>
<li><a href="/en-US/docs/Web/HTTP/Access_control_CORS">HTTP access control (CORS)</a></li>
<li><a href="/en-US/docs/Web/HTTP">HTTP</a></li>
</ul>
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