---
title: Event.isTrusted
slug: Web/API/Event/isTrusted
translation_of: Web/API/Event/isTrusted
---
<p>{{APIRef("DOM")}}</p>

<p>{{domxref("Event")}} 介面的 <code>isTrusted</code> 唯讀屬性為一個布林值，若事件物件是由使用者操作而產生，則 <code>isTrusted</code> 值為 <code>true</code>。若事件物件是由程式碼所建立、修改，或是透過 {{domxref("EventTarget.dispatchEvent()")}} 來觸發，則 <code>isTrusted</code> 值為 <code>false</code>。</p>

<h2 id="Syntax" name="Syntax">語法</h2>

<pre class="syntaxbox">var bool = event.isTrusted;
</pre>

<h2 id="範例">範例</h2>

<pre> if (e.isTrusted) {
     /* The event is trusted. */
 } else {
     /* The event is not trusted. */
 }
</pre>

<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('DOM WHATWG', '#dom-event-istrusted', 'Event.isTrusted')}}</td>
   <td>{{ Spec2('DOM WHATWG') }}</td>
   <td> </td>
  </tr>
  <tr>
   <td>{{SpecName('DOM3 Events', '#trusted-events', 'Trusted events')}}</td>
   <td>{{Spec2('DOM3 Events')}}</td>
   <td>Adds requirements regarding trusted and untrusted events, though it does not itself define the <code>isTrusted</code> property.</td>
  </tr>
  <tr>
   <td>{{SpecName('DOM4', '#dom-event-istrusted', 'Event.isTrusted')}}</td>
   <td>{{Spec2('DOM4')}}</td>
   <td>Initial definition.</td>
  </tr>
 </tbody>
</table>

<h2 id="瀏覽器相容性">瀏覽器相容性</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(46.0)}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatNo}} [1]</td>
   <td>{{CompatOpera(33)}}</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>Android Webview</th>
   <th>Firefox Mobile (Gecko)</th>
   <th>Firefox OS</th>
   <th>IE Mobile</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
   <th>Chrome for Android</th>
  </tr>
  <tr>
   <td>Basic support</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatChrome(46.0)}}</td>
   <td>{{CompatVersionUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatUnknown}}</td>
   <td>{{CompatOperaMobile(33)}}</td>
   <td>{{CompatNo}}</td>
   <td>{{CompatChrome(46.0)}}</td>
  </tr>
 </tbody>
</table>
</div>

<p>[1] In Internet Explorer, all events are trusted except those that are created with the <code>createEvent()</code> method.</p>