Revision 1065146 of XMLHttpRequest

<div>{{APIRef("XMLHttpRequest")}}</div>

<p><span class="seoSummary"><code>XMLHttpRequest</code> is an&nbsp;API that provides client functionality for transferring data between a client and a server. It provides an easy way to retrieve data from a URL without having to do a full page refresh. This enables a Web page to update just a part of the page without disrupting what the user is doing.</span> &nbsp;<code>XMLHttpRequest</code>&nbsp;is used heavily in <a href="/en-US/docs/AJAX">AJAX</a> programming.</p>

<p>XMLHttpRequest was originally designed by Microsoft and adopted by Mozilla, Apple, and Google. It's now being <a class="external" href="https://xhr.spec.whatwg.org/">standardized at the <abbr title="Web Hypertext Application Technology Working Group">WHATWG</abbr></a>. Despite its name, <code>XMLHttpRequest</code> can be used to retrieve any type of data, not just XML, and it supports protocols other than <a href="/en-US/docs/Web/HTTP">HTTP</a> (including <code>file</code> and <code>ftp</code>).</p>

<h2 id="Constructor">Constructor</h2>

<dl>
 <dt>{{domxref("XMLHttpRequest.XMLHttpRequest", "XMLHttpRequest")}}</dt>
 <dd>The constructor initiates an XMLHttpRequest. It must be called before any other method calls.</dd>
</dl>

<h2 id="Properties">Properties</h2>

<p><em>This interface also inherits properties of {{domxref("XMLHttpRequestEventTarget")}} and of {{domxref("EventTarget")}}.</em></p>

<dl>
 <dt id="xmlhttprequest-onreadystatechange">{{domxref("XMLHttpRequest.onreadystatechange")}}</dt>
 <dd>An {{domxref("EventHandler")}} that is called whenever the <code>readyState</code> attribute changes.</dd>
 <dt id="xmlhttprequest-readystate">{{domxref("XMLHttpRequest.readyState")}} {{readonlyinline}}</dt>
 <dd>Returns an <code>unsigned short</code>, the state of the request.</dd>
 <dt>{{domxref("XMLHttpRequest.response")}} {{readonlyinline}}</dt>
 <dd>Returns an {{domxref("ArrayBuffer")}}, {{domxref("Blob")}}, {{domxref("Document")}}, JavaScript object, or a {{domxref("DOMString")}}, depending of the value of {{domxref("XMLHttpRequest.responseType")}}. that contains the response entity body.</dd>
 <dt id="xmlhttprequest-responsetext">{{domxref("XMLHttpRequest.responseText")}} {{readonlyinline}}</dt>
 <dd>Returns a {{domxref("DOMString")}} that contains the response to the request as text, or <code>null</code> if the request was unsuccessful or has not yet been sent.</dd>
 <dt id="xmlhttprequest-responsetype">{{domxref("XMLHttpRequest.responseType")}}</dt>
 <dd>Is an enumerated value that defines the response type.</dd>
 <dt id="xmlhttprequest-responsexml">{{domxref("XMLHttpRequest.responseURL")}} {{readonlyinline}}</dt>
 <dd>Returns the serialized URL of the response or the empty string if the URL is null.</dd>
 <dt id="xmlhttprequest-responsexml">{{domxref("XMLHttpRequest.responseXML")}} {{readonlyinline}} {{NotAvailableInWorkerInline}}</dt>
 <dd>Returns a {{domxref("Document")}} containing the response to the request, or <code>null</code> if the request was unsuccessful, has not yet been sent, or cannot be parsed as XML or HTML.</dd>
 <dt id="xmlhttprequest-status">{{domxref("XMLHttpRequest.status")}} {{readonlyinline}}</dt>
 <dd>Returns an <code>unsigned short</code> with the status of the response of the request.</dd>
 <dt id="xmlhttprequest-statustext">{{domxref("XMLHttpRequest.statusText")}} {{readonlyinline}}</dt>
 <dd>Returns a {{domxref("DOMString")}} containing the response string returned by the HTTP server. Unlike {{domxref("XMLHTTPRequest.status")}}, this includes the entire text of the response message ("<code>200 OK</code>", for example).</dd>
 <dt id="xmlhttprequest-timeout">{{domxref("XMLHttpRequest.timeout")}}</dt>
 <dd>Is an <code>unsigned long</code> representing the number of milliseconds a request can take before automatically being terminated.</dd>
 <dt id="xmlhttprequesteventtarget-ontimeout">{{domxref("XMLHttpRequestEventTarget.ontimeout")}}</dt>
 <dd>Is an {{domxref("EventHandler")}} that is called whenever the request times out. {{gecko_minversion_inline("12.0")}}</dd>
 <dt id="xmlhttprequest-upload">{{domxref("XMLHttpRequest.upload")}} {{readonlyinline}}</dt>
 <dd>Is an {{domxref("XMLHttpRequestUpload")}}, representing the upload process.</dd>
 <dt id="xmlhttprequest-withcredentials">{{domxref("XMLHttpRequest.withCredentials")}}</dt>
 <dd>Is a {{jsxref("Boolean")}} that indicates whether or not cross-site <code>Access-Control</code> requests should be made using credentials such as cookies or authorization headers.</dd>
</dl>

<h3 id="Non-standard_properties">Non-standard properties</h3>

<dl>
 <dt>{{domxref("XMLHttpRequest.channel")}}{{ReadOnlyInline}}</dt>
 <dd>Is a {{Interface("nsIChannel")}}. The channelused by the&nbsp; object when performing the request.</dd>
 <dt>{{domxref("XMLHttpRequest.mozAnon")}}{{ReadOnlyInline}}</dt>
 <dd>Is a boolean. If true, the request will be sent without cookie and authentication headers.</dd>
 <dt>{{domxref("XMLHttpRequest.mozSystem")}}{{ReadOnlyInline}}</dt>
 <dd>Is a boolean. If true, the same origin policy will not be enforced on the request.</dd>
 <dt>{{domxref("XMLHttpRequest.mozBackgroundRequest")}}</dt>
 <dd>Is a boolean. It indicates whether or not the object represents a background service request.</dd>
 <dt>{{domxref("XMLHttpRequest.mozResponseArrayBuffer")}}{{gecko_minversion_inline("2.0")}} {{obsolete_inline("6")}} {{ReadOnlyInline}}</dt>
 <dd>Is an <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer"><code>ArrayBuffer</code></a>. The response to the request, as a JavaScript typed array.</dd>
 <dt>{{domxref("XMLHttpRequest.multipart")}}{{obsolete_inline("22")}}</dt>
 <dd><strong>This Gecko-only feature, a boolean, was removed in Firefox/Gecko 22.</strong> Please use <a href="/en-US/docs/Web/API/Server-sent_events">Server-Sent Events</a>, <a href="/en-US/docs/Web/API/WebSockets_API">Web Sockets</a>, or <code>responseText</code> from progress events instead.</dd>
</dl>

<dl>
</dl>

<h2 id="Methods">Methods</h2>

<dl>
 <dt>{{domxref("XMLHttpRequest.abort")}}</dt>
 <dd>Aborts the request if it has already been sent.</dd>
 <dt>{{domxref("XMLHttpRequest.getAllResponseHeaders")}}</dt>
 <dd>Returns all the response headers, separated by <a href="https://developer.mozilla.org/en-US/docs/Glossary/CRLF">CRLF</a>, as a string, or <code>null</code> if no response has been received.<strong> </strong></dd>
 <dt>{{domxref("XMLHttpRequest.getResponseHeader")}}</dt>
 <dd>Returns the string containing the text of the specified header, or <code>null</code> if either the response has not yet been received or the header doesn't exist in the response.</dd>
 <dt>{{domxref("XMLHttpRequest.open")}}</dt>
 <dd>Initializes a request. This method is to be used from JavaScript code; to initialize a request from native code, use <a class="internal" href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequest#openRequest()"><code>openRequest()</code></a> instead.</dd>
 <dt>{{domxref("XMLHttpRequest.overrideMimeType")}}</dt>
 <dd>Overrides the MIME type returned by the server.</dd>
 <dt>{{domxref("XMLHttpRequest.send")}}<span style="display:none"> </span></dt>
 <dd>Sends the request. If the request is asynchronous (which is the default), this method returns as soon as the request is sent.</dd>
 <dt>{{domxref("XMLHttpRequest.setRequestHeader")}}</dt>
 <dd>Sets the value of an HTTP request header. You must call <code>setRequestHeader()</code>after&nbsp;<a href="#open"><code>open()</code></a>, but before <code>send()</code>.</dd>
</dl>

<h3 id="Non-standard_methods">Non-standard methods</h3>

<dl>
 <dt>{{domxref("XMLHttpRequest.init")}}</dt>
 <dd>Initializes the object for use from C++ code.</dd>
</dl>

<div class="warning"><strong>Warning:</strong> This method must <em>not</em> be called from JavaScript.</div>

<dl>
 <dt>{{domxref("XMLHttpRequest.openRequest")}}</dt>
 <dd>Initializes a request. This method is to be used from native code; to initialize a request from JavaScript code, use <a class="internal" href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequest#open()"><code>open()</code></a>instead. See the documentation for <code>open()</code>.</dd>
 <dt>{{domxref("XMLHttpRequest.sendAsBinary")}}{{deprecated_inline(31)}}</dt>
 <dd>A variant of the <code>send()</code> method that sends binary data.</dd>
</dl>

<h2>Events</h2>

<p><code>onreadystatechange</code> as a property of the <code>XMLHttpRequest</code> instance is supported in all browsers.</p>

<p>Since then, a number of additional event handlers were implemented in various browsers (<code>onload</code>, <code>onerror</code>, <code>onprogress</code>, etc.). These are supported in Firefox. In particular, see {{interface("nsIXMLHttpRequestEventTarget")}} and <a href="/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest">Using XMLHttpRequest</a>.</p>

<p>More recent browsers, including Firefox, also support listening to the <code>XMLHttpRequest</code> events via standard <code><a href="/en-US/docs/Web/API/EventTarget/addEventListener">addEventListener</a></code> APIs in addition to setting <code>on*</code> properties to a handler function.</p>

<h2>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')}}</td>
   <td>{{Spec2('XMLHttpRequest')}}</td>
   <td>WHATWG living standard</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>

<p>{{CompatibilityTable}}</p>

<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 (XHR1)</td>
   <td>1</td>
   <td>{{CompatGeckoDesktop("1.0")}}<sup>[1]</sup></td>
   <td>5<sup>[2]</sup><br />
    7</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>1.2</td>
  </tr>
  <tr>
   <td><code>send(ArrayBuffer)</code></td>
   <td>9</td>
   <td>{{CompatGeckoDesktop("9.0")}}</td>
   <td>10</td>
   <td>11.60</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(ArrayBufferView)</code></td>
   <td>22</td>
   <td>{{CompatGeckoDesktop("20.0")}}</td>
   <td>{{compatUnknown}}</td>
   <td>{{compatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(Blob)</code></td>
   <td>7</td>
   <td>{{CompatGeckoDesktop("1.9.2")}}</td>
   <td>10</td>
   <td>12</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(FormData)</code></td>
   <td>6</td>
   <td>{{CompatGeckoDesktop("2.0")}}</td>
   <td>10</td>
   <td>12</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>sendAsBinary(DOMString)</code> {{non-standard_inline}} {{deprecated_inline}}</td>
   <td>{{compatNo}}<sup>[3]</sup></td>
   <td>{{CompatGeckoDesktop("1.8.1")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
  </tr>
  <tr>
   <td><code>response</code></td>
   <td>10</td>
   <td>{{CompatGeckoDesktop("6.0")}}</td>
   <td>10</td>
   <td>11.60</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'arraybuffer'</td>
   <td>10</td>
   <td>{{CompatGeckoDesktop("6.0")}}</td>
   <td>10</td>
   <td>11.60</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'blob'</td>
   <td>19</td>
   <td>{{CompatGeckoDesktop("6.0")}}</td>
   <td>10</td>
   <td>12</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'document'</td>
   <td>18</td>
   <td>{{CompatGeckoDesktop("11.0")}}</td>
   <td>10</td>
   <td>{{CompatNo}}</td>
   <td>6.1</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'json'</td>
   <td>31</td>
   <td>{{CompatGeckoDesktop("10.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>12<sup>[4]</sup><br />
    {{CompatNo}} 16<br />
    17</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td>Progress Events</td>
   <td>7</td>
   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
   <td>10</td>
   <td>12</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>withCredentials</code></td>
   <td>3</td>
   <td>{{CompatGeckoDesktop("1.9.1")}}</td>
   <td>10</td>
   <td>12</td>
   <td>4</td>
  </tr>
  <tr>
   <td><code>timeout</code></td>
   <td>29.0<sup>[5]</sup></td>
   <td>{{CompatGeckoDesktop("12.0")}}</td>
   <td>8</td>
   <td>12<sup>[6]</sup><br />
    16</td>
   <td>{{CompatVersionUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'moz-blob'</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatGeckoDesktop("12.0")}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatNo}}</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 Phone</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>
  <tr>
   <td><code>send(ArrayBuffer)</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(ArrayBufferView)</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(Blob)</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>send(FormData)</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>sendAsBinary(DOMString)</code> {{non-standard_inline}} {{deprecated_inline}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>response</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'arraybuffer'</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'blob'</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'document'</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'json'</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td>Progress Events</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>withCredentials</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>timeout</code></td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
  <tr>
   <td><code>responseType</code> = 'moz-blob'</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{compatUnknown}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] Gecko 11.0 {{geckoRelease("11.0")}} removed support for using the <code>responseType</code> and <code>withCredentials</code> attributes when performing synchronous requests. Attempting to do so throws an <code>NS_ERROR_DOM_INVALID_ACCESS_ERR</code> exception. This change has been proposed to the W3C for standardization.</p>

<p>Gecko 12.0 {{geckoRelease("12.0")}} and later support using <code>XMLHttpRequest</code> to read from <a href="/en-US/docs/Web/HTTP/data_URIs"><code>data:</code> URLs</a>.</p>

<p>Gecko 20.0 {{geckoRelease("20.0")}} adds the support of sending an <a href="/en-US/docs/Web/API/ArrayBufferView"><code>ArrayBufferView</code></a> - sending a plain <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer"><code>ArrayBuffer</code></a> is not part of the <code>XMLHttpRequest</code> specification any longer and should be treated as deprecated.</p>

<p>[2] This feature was implemented via <code>ActiveXObject()</code>. Since version 7 Internet Explorer implements the standard <code>XMLHttpRequest</code>.</p>

<p>[3] There is a <a href="#sendAsBinary%28%29_polyfill">polyfill</a> available to support <code>sendAsBinary()</code>.</p>

<p>[4] Before switching to Blink/Chromium Opera supported <code>responseType=json</code> between Opera 12 and Opera 15. Support is added again after it is implemented also in Blink (Opera 17).</p>

<p>[5] This feature was implemented in <a href="https://code.google.com/p/chromium/issues/detail?id=231959">bug 231959</a>.</p>

<p>[6] See <a href="https://dev.opera.com/articles/view/xhr2/#xhrtimeouts">how to set and handle timeouts</a>.</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>MDN articles about XMLHttpRequest:
  <ul>
   <li><a href="/en-US/docs/AJAX/Getting_Started">AJAX - Getting Started</a></li>
   <li><a href="/en-US/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest">Using XMLHttpRequest</a></li>
   <li><a href="/en-US/docs/Web/API/XMLHttpRequest/HTML_in_XMLHttpRequest">HTML in XMLHttpRequest</a></li>
   <li><a href="/en-US/docs/Web/API/FormData"><code>FormData</code></a></li>
  </ul>
 </li>
 <li>XMLHttpRequest references from W3C and browser vendors:
  <ul>
   <li><a class="external" href="https://www.w3.org/TR/XMLHttpRequest1/">W3C: XMLHttpRequest</a> (base features)</li>
   <li><a class="external" href="https://dvcs.w3.org/hg/xhr/raw-file/tip/Overview.html">W3C: XMLHttpRequest</a> (latest editor's draft with extensions to the base functionality, formerly XMLHttpRequest Level 2</li>
   <li><a class="external" href="https://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmobjxmlhttprequest.asp">Microsoft documentation</a></li>
   <li><a class="external" href="https://developer.apple.com/library/safari/#documentation/AppleApplications/Conceptual/SafariJSProgTopics/Articles/XHR.html">Apple developers' reference</a></li>
  </ul>
 </li>
 <li><a class="external" href="https://jibbering.com/2002/4/httprequest.html">"Using the XMLHttpRequest Object" (jibbering.com)</a></li>
 <li><a class="external" href="https://www.peej.co.uk/articles/rich-user-experience.html">XMLHttpRequest - REST and the Rich User Experience</a></li>
 <li><a class="external" href="https://www.html5rocks.com/en/tutorials/file/xhr2/">HTML5 Rocks - New Tricks in XMLHttpRequest2</a></li>
 <li><a href="https://programmers.stackexchange.com/questions/157375/why-does-xmlhttprequest-not-seem-to-follow-a-naming-convention">Thread on the naming convention of <code>XMLHttpRequest</code></a></li>
 <li><code>Chrome scope availability</code> - how to access from JSM modules etc which do not have access to DOM
  <ul>
   <li><a href="/en-US/docs/Mozilla/Tech/XPCOM/Language_Bindings/Components.utils.importGlobalProperties">Components.utils.importGlobalProperties</a></li>
   <li><a href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequest">nsIXMLHttpRequest</a></li>
  </ul>
 </li>
</ul>