path: root/files/zh-tw/web/api/element/click_event/index.html

---
title: click
slug: Web/API/Element/click_event
tags:
  - 待翻譯
translation_of: Web/API/Element/click_event
---
<p><code>click</code> 事件通常會在設備的按鈕（通常是滑鼠按鍵）點擊元素時執行。</p>

<h2 id="基本資料">基本資料</h2>

<dl>
 <dt style="float: left; text-align: right; width: 120px;">詳述</dt>
 <dd style="margin: 0 0 0 120px;"><a class="external" href="http://www.w3.org/TR/DOM-Level-3-Events/#event-type-click">DOM L3</a></dd>
 <dt style="float: left; text-align: right; width: 120px;">介面</dt>
 <dd style="margin: 0 0 0 120px;">{{domxref("MouseEvent")}}</dd>
 <dt style="float: left; text-align: right; width: 120px;">Bubbles</dt>
 <dd style="margin: 0 0 0 120px;">Yes</dd>
 <dt style="float: left; text-align: right; width: 120px;">Cancelable</dt>
 <dd style="margin: 0 0 0 120px;">Yes</dd>
 <dt style="float: left; text-align: right; width: 120px;">Target</dt>
 <dd style="margin: 0 0 0 120px;">網頁元素</dd>
 <dt style="float: left; text-align: right; width: 120px;">Default Action</dt>
 <dd style="margin: 0 0 0 120px;">Varies</dd>
</dl>

<h2 id="Properties">Properties</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><a href="/en-US/docs/Web/API/EventTarget" title="EventTarget is an interface implemented by objects that can receive events and may have listeners for them."><code>EventTarget</code></a></td>
   <td>The event target (the topmost target in the DOM tree).</td>
  </tr>
  <tr>
   <td><code>type</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/DOMString" title="DOMString is a UTF-16 String. As JavaScript already uses such strings, DOMString is mapped directly to a String."><code>DOMString</code></a></td>
   <td>The type of event.</td>
  </tr>
  <tr>
   <td><code>bubbles</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/Boolean" title="The Boolean object is an object wrapper for a boolean value."><code>Boolean</code></a></td>
   <td>Whether the event normally bubbles or not</td>
  </tr>
  <tr>
   <td><code>cancelable</code> {{readonlyInline}}</td>
   <td><a href="/en-US/docs/Web/API/Boolean" title="The Boolean object is an object wrapper for a boolean value."><code>Boolean</code></a></td>
   <td>Whether the event is cancellable or not?</td>
  </tr>
  <tr>
   <td><code>view</code> {{readonlyInline}}</td>
   <td><a class="new" href="/en-US/docs/Web/API/WindowProxy" rel="nofollow" title="The documentation about this has not yet been written; please consider contributing!"><code>WindowProxy</code></a></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><code>long</code> (<code>float</code>)</td>
   <td>A count of consecutive clicks that happened in a short amount of time, incremented by one.</td>
  </tr>
  <tr>
   <td><code>currentTarget</code> {{readonlyInline}}</td>
   <td>EventTarget</td>
   <td>The node that had the event listener attached.</td>
  </tr>
  <tr>
   <td><code>relatedTarget</code> {{readonlyInline}}</td>
   <td>EventTarget</td>
   <td>For <code>mouseover</code>, <code>mouseout</code>, <code>mouseenter</code> and <code>mouseleave</code> events: the target of the complementary event (the <code>mouseleave</code> target in the case of a <code>mouseenter</code> event). <code>null</code> otherwise.</td>
  </tr>
  <tr>
   <td><code>screenX</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The X coordinate of the mouse pointer in global (screen) coordinates.</td>
  </tr>
  <tr>
   <td><code>screenY</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The Y coordinate of the mouse pointer in global (screen) coordinates.</td>
  </tr>
  <tr>
   <td><code>clientX</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The X coordinate of the mouse pointer in local (DOM content) coordinates.</td>
  </tr>
  <tr>
   <td><code>clientY</code> {{readonlyInline}}</td>
   <td>long</td>
   <td>The Y coordinate of the mouse pointer in local (DOM content) coordinates.</td>
  </tr>
  <tr>
   <td><code>button</code> {{readonlyInline}}</td>
   <td>unsigned short</td>
   <td>The button number that was pressed when the mouse event was fired: Left button=0, middle button=1 (if present), right button=2. For mice configured for left handed use in which the button actions are reversed the values are instead read from right to left.</td>
  </tr>
  <tr>
   <td><code>buttons</code> {{readonlyInline}}</td>
   <td>unsigned short</td>
   <td>The buttons being pressed when the mouse event was fired: Left button=1, Right button=2, Middle (wheel) button=4, 4th button (typically, "Browser Back" button)=8, 5th button (typically, "Browser Forward" button)=16. If two or more buttons are pressed, returns the logical sum of the values. E.g., if Left button and Right button are pressed, returns 3 (=1 | 2). <a href="/en-US/docs/Web/API/MouseEvent">More info</a>.</td>
  </tr>
  <tr>
   <td><code>mozPressure</code> {{readonlyInline}}</td>
   <td>float</td>
   <td>The amount of pressure applied to a touch or tabdevice when generating the event; this value ranges between 0.0 (minimum pressure) and 1.0 (maximum pressure).</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>

<pre class="brush: js">&lt;div id="test"&gt;&lt;/div&gt;

&lt;script&gt;
  document.getElementById("test").addEventListener("click", function( event ) {
    // 在 “clicked div”顯示點擊次數
    event.target.innerHTML = "click count: " + event.detail;
  }, false);
&lt;/script&gt;
</pre>

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

<h3 id="Internet_Explorer">Internet Explorer</h3>

<p>Internet Explorer 8 &amp; 9 suffer from a bug where elements with a computed {{cssxref("background-color")}} of <a href="/en-US/docs/Web/CSS/color_value#transparent_keyword"><code>transparent</code></a> that are overlaid on top of other element(s) won't receive <code>click</code> events. Any <code>click</code> events will be fired at the underlying element(s) instead. See <a href="http://jsfiddle.net/YUKma/show/">this live example</a> for a demonstration.</p>

<p>Known workarounds for this bug:</p>

<ul>
 <li>For IE9 only:
  <ul>
   <li>Set <code>{{cssxref("background-color")}}: <a href="/en-US/docs/Web/CSS/color_value#rgba()">rgba</a>(0,0,0,0)</code></li>
   <li>Set <code>{{cssxref("opacity")}}: 0</code> and an explicit {{cssxref("background-color")}} other than <a href="/en-US/docs/Web/CSS/color_value#transparent_keyword"><code>transparent</code></a></li>
  </ul>
 </li>
 <li>For IE8 and IE9: Set <code><a href="http://msdn.microsoft.com/en-us/library/ms532847(v=vs.85).aspx">filter</a>: alpha(opacity=0);</code> and an explicit {{cssxref("background-color")}} other than <a href="/en-US/docs/Web/CSS/color_value#transparent_keyword"><code>transparent</code></a></li>
</ul>

<h3 id="Safari_Mobile">Safari Mobile</h3>

<p>Safari Mobile 7.0+ (and likely earlier versions too) suffers from a bug where <code>click</code> events aren't fired on elements that aren't typically interactive (e.g. {{HTMLElement("div")}}) and which also don't have event listeners directly attached to the elements themselves (i.e. <a href="http://davidwalsh.name/event-delegate">event delegation</a> is being used). See <a href="http://jsfiddle.net/cvrhulu/k9t0sdnf/show/">this live example</a> for a demonstration. See also <a href="https://developer.apple.com/library/safari/documentation/appleapplications/reference/safariwebcontent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW6">Safari's docs on making elements clickable</a> and the <a href="https://developer.apple.com/library/safari/documentation/appleapplications/reference/safariwebcontent/HandlingEvents/HandlingEvents.html#//apple_ref/doc/uid/TP40006511-SW7">definition of "clickable element"</a>.</p>

<p>Known workarounds for this bug:</p>

<ul>
 <li>Set {{cssxref("cursor")}}<code>: pointer;</code> on the element or any of its ancestors.</li>
 <li>Add a dummy <code>onclick=""</code> attribute to the element or any of its ancestors up to but not including {{HTMLElement("body")}}.</li>
 <li>Use a typically interactive element (e.g. {{HTMLElement("a")}}) instead of one that isn't typically interactive (e.g. {{HTMLElement("div")}}).</li>
 <li>Stop using <code>click</code> <a href="http://davidwalsh.name/event-delegate">event delegation</a>.</li>
</ul>

<p>Safari Mobile considers the following elements to be typically interactive (and thus they aren't affected by this bug):</p>

<ul>
 <li>{{HTMLElement("a")}} (but it must have an <code>href</code>)</li>
 <li>{{HTMLElement("area")}} (but it must have an <code>href</code>)</li>
 <li>{{HTMLElement("button")}}</li>
 <li>{{HTMLElement("img")}}</li>
 <li>{{HTMLElement("input")}}</li>
 <li>{{HTMLElement("label")}} (but it must be associated with a form control)</li>
 <li>{{HTMLElement("textarea")}}</li>
 <li><em>This list is incomplete; you can help MDN by doing further testing/research and expanding it.</em></li>
</ul>

<h2 id="關聯事件">關聯事件</h2>

<ul>
 <li>{{event("mousedown")}}</li>
 <li>{{event("mouseup")}}</li>
 <li>{{event("mousemove")}}</li>
 <li>{{event("click")}}</li>
 <li>{{event("dblclick")}}</li>
 <li>{{event("mouseover")}}</li>
 <li>{{event("mouseout")}}</li>
 <li>{{event("mouseenter")}}</li>
 <li>{{event("mouseleave")}}</li>
 <li>{{event("contextmenu")}}</li>
</ul>