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---
title: touchcancel
slug: Web/API/Element/touchcancel_event
translation_of: Web/API/Element/touchcancel_event
---
<p>{{APIRef}}</p>
<p><code>touchcancel 觸控點發生失效的事件被觸發(例如太多觸控點時)</code></p>
<h2 id="一般資訊">一般資訊</h2>
<dl>
<dt style="float: left; text-align: right; width: 120px;">規範</dt>
<dd style="margin: 0 0 0 120px;"><a class="external" href="http://www.w3.org/TR/touch-events/#the-touchcancel-event">Touch Events</a></dd>
<dt style="float: left; text-align: right; width: 120px;">介面</dt>
<dd style="margin: 0 0 0 120px;">TouchEvent</dd>
<dt style="float: left; text-align: right; width: 120px;">起泡事件</dt>
<dd style="margin: 0 0 0 120px;">是</dd>
<dt style="float: left; text-align: right; width: 120px;">可取消</dt>
<dd style="margin: 0 0 0 120px;">否</dd>
<dt style="float: left; text-align: right; width: 120px;">對象</dt>
<dd style="margin: 0 0 0 120px;">Document, Element</dd>
<dt style="float: left; text-align: right; width: 120px;">預設行為</dt>
<dd style="margin: 0 0 0 120px;">無</dd>
</dl>
<h2 id="屬性">屬性</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Property</th>
<th scope="col">Type</th>
<th scope="col">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>target</code> {{readonlyInline}}</td>
<td>EventTarget</td>
<td>The event target (the topmost target in the DOM tree).</td>
</tr>
<tr>
<td><code>type</code> {{readonlyInline}}</td>
<td>DOMString</td>
<td>The type of event.</td>
</tr>
<tr>
<td><code>bubbles</code> {{readonlyInline}}</td>
<td>Boolean</td>
<td>Whether the event normally bubbles or not.</td>
</tr>
<tr>
<td><code>cancelable</code> {{readonlyInline}}</td>
<td>Boolean</td>
<td>Whether the event is cancellable or not.</td>
</tr>
<tr>
<td><code>view</code> {{readonlyInline}}</td>
<td>WindowProxy</td>
<td><a href="/en-US/docs/Web/API/Document/defaultView" title="In browsers, document.defaultView returns the window object associated with a document, or null if none is available."><code>document.defaultView</code></a> (<code>window</code> of the document)</td>
</tr>
<tr>
<td><code>detail</code> {{readonlyInline}}</td>
<td>long (float)</td>
<td>0.</td>
</tr>
<tr>
<td><code>touches</code> {{readonlyInline}}</td>
<td>TouchList</td>
<td>A list of <a href="/en/DOM/Touch"><code>Touch</code></a>es for every point of contact currently touching the surface.</td>
</tr>
<tr>
<td><code>targetTouches</code> {{readonlyInline}}</td>
<td>TouchList</td>
<td>A list of <a href="/en/DOM/Touch"><code>Touch</code></a>es for every point of contact that is touching the surface and started on the element that is the target of the current event.</td>
</tr>
<tr>
<td><code>changedTouches</code> {{readonlyInline}}</td>
<td>TouchList</td>
<td>A list of <a href="/en-US/docs/DOM/Touch"><code>Touch</code></a>es for every point of contact which contributed to the event.<br>
For the touchstart event this must be a list of the touch points that just became active with the current event. For the touchmove event this must be a list of the touch points that have moved since the last event. For the touchend and touchcancel events this must be a list of the touch points that have just been removed from the surface.</td>
</tr>
<tr>
<td><code>ctrlKey</code> {{readonlyInline}}</td>
<td>boolean</td>
<td><code>true</code> if the control key was down when the event was fired. <code>false</code> otherwise.</td>
</tr>
<tr>
<td><code>shiftKey</code> {{readonlyInline}}</td>
<td>boolean</td>
<td><code>true</code> if the shift key was down when the event was fired. <code>false</code> otherwise.</td>
</tr>
<tr>
<td><code>altKey</code> {{readonlyInline}}</td>
<td>boolean</td>
<td><code>true</code> if the alt key was down when the event was fired. <code>false</code> otherwise.</td>
</tr>
<tr>
<td><code>metaKey</code> {{readonlyInline}}</td>
<td>boolean</td>
<td><code>true</code> if the meta key was down when the event was fired. <code>false</code> otherwise.</td>
</tr>
</tbody>
</table>
<h2 id="範例">範例</h2>
<p>各種觸控事件的範例：<a href="/en-US/docs/DOM/Touch_events">Touch events</a>。</p>
<h2 id="瀏覽器相容性">瀏覽器相容性</h2>
{{Compat("api.Element.touchcancel_event")}}
<h2 id="相關事件">相關事件</h2>
<p>{{ domxref("GlobalEventHandlers.ontouchcancel","ontouchcancel")}}</p>
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