---
title: XMLHttpRequestEventTarget
slug: Web/API/XMLHttpRequestEventTarget
translation_of: Web/API/XMLHttpRequestEventTarget
---
<p>{{APIRef("XMLHttpRequest")}}</p>

<p><code>XMLHttpRequestEventTarget</code> 介面描述了一個 {{ domxref("XMLHttpRequest") }} 物件實體當中，所有可註冊事件處理器的屬性。</p>

<p>{{InheritanceDiagram}}</p>

<h2 id="屬性">屬性</h2>

<dl>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onabort") }}</dt>
 <dd>Contains the function to call when a request is aborted and the {{event('abort')}} event is received by this object.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onerror") }}</dt>
 <dd>Contains the function to call when a request encounters an error and the {{event('error')}} event is received by this object.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onload") }}</dt>
 <dd>Contains the function to call when an HTTP request returns after successfully fetching content and the {{event('load')}} event is received by this object.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onloadstart") }}</dt>
 <dd>Contains the function that gets called when the HTTP request first begins loading data and the {{event('loadstart')}} event is received by this object.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onprogress") }}</dt>
 <dd>Contains the function that is called periodically with information about the progress of the request and the {{event('progress')}} event is received by this object.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.ontimeout") }}</dt>
 <dd>Contains the function that is called if the event times out and the {{event("timeout")}} event is received by this object; this only happens if a timeout has been previously established by setting the value of the <code>XMLHttpRequest</code> object's <code>timeout</code> attribute.</dd>
 <dt>{{ domxref("XMLHttpRequestEventTarget.onloadend") }}</dt>
 <dd>Contains the function that is called when the load is completed, even if the request failed, and the {{event('loadend')}} event is received by this object.</dd>
</dl>

<h2 id="規範">規範</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="瀏覽器相容性">瀏覽器相容性</h2>

{{Compat("api.XMLHttpRequestEventTarget")}}

<h2 id="參見">參見</h2>

<ul>
 <li>{{ domxref("XMLHttpRequest") }}</li>
 <li><a href="/zh-TW/DOM/XMLHttpRequest/Using_XMLHttpRequest" title="Using XMLHttpRequest">Using XMLHttpRequest</a></li>
</ul>