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---
title: XMLHttpRequest.status
slug: Web/API/XMLHttpRequest/status
translation_of: Web/API/XMLHttpRequest/status
---
<div>{{APIRef('XMLHttpRequest')}}</div>
<p><strong>XMLHttpRequest.status</strong> 屬性根據XMLHttpRequest的回應傳回數值化的狀況編碼。狀況編碼為一正短整數（<code>unsigned short）。</code>Before the request is complete, the value of <code>status</code> will be <code>0</code>. It is worth noting that browsers report a status of 0 in case of XMLHttpRequest errors too.</p>
<p>The status codes returned are the standard <a href="/en-US/docs/Web/HTTP/Response_codes">HTTP status codes</a>. For example, <code>status</code> <code>200</code> denotes a successful request. If the server response doesn't explicitly specify a status code, <code>XMLHttpRequest.status</code> will assume the default value of <code>200</code>.</p>
<h2 id="Example">Example</h2>
<pre class="brush: js">var xhr = new XMLHttpRequest();
console.log('UNSENT', xhr.status);
xhr.open('GET', '/server', true);
console.log('OPENED', xhr.status);
xhr.onprogress = function () {
console.log('LOADING', xhr.status);
};
xhr.onload = function () {
console.log('DONE', xhr.status);
};
xhr.send(null);
/**
* Outputs the following:
*
* UNSENT 0
* OPENED 0
* LOADING 200
* DONE 200
*/
</pre>
<h2 id="Specifications">Specifications</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('XMLHttpRequest', '#the-status-attribute')}}</td>
<td>{{Spec2('XMLHttpRequest')}}</td>
<td>WHATWG living standard</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
{{Compat("api.XMLHttpRequest.status")}}
<h2 id="See_also">See also</h2>
<ul>
<li>List of <a href="/en-US/docs/Web/HTTP/Response_codes">HTTP response codes</a></li>
</ul>
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