---
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>

<div>{{CompatibilityTable}}</div>

<div id="compat-desktop">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Chrome</th>
   <th>Firefox (Gecko)</th>
   <th>Internet Explorer</th>
   <th>Opera</th>
   <th>Safari (WebKit)</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatChrome(1)}}</td>
   <td>{{CompatGeckoDesktop("1.0")}}<sup>[1]</sup></td>
   <td>{{CompatIe(7)}}<sup>[1]</sup></td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatSafari("1.2")}}</td>
  </tr>
 </tbody>
</table>
</div>

<div id="compat-mobile">
<table class="compat-table">
 <tbody>
  <tr>
   <th>Feature</th>
   <th>Android</th>
   <th>Chrome for Android</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatUnknown}}</td>
   <td>1.0</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] Internet Explorer versions 5 and 6 lacked the XMLHttpRequest object, but provided a way to make AJAX requests using <code>ActiveXObject</code>.</p>

<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>