uTools-Manuals/docs/jQuery/dblclick.html

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<h1 class="entry-title">.dblclick()</h1>
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						所属分类：<span class="category"><a href="/category/events/">事件</a> &gt; <a href="/category/events/mouse-events/">鼠标事件</a></span>
<span class="pull-right">英文文档：<a href="https://api.jquery123.com/dblclick/" target="_blank">.dblclick()</a></span>
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<span class="name">.dblclick( handler(eventObject) )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span>
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<p class="desc"><strong>描述: </strong>为JavaScript 的 "dblclick" 事件绑定一个处理函数，或者触发元素上的 "dblclick" 事件。</p>
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<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.dblclick( handler(eventObject) )</h4>
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<div><strong>handler(eventObject)</strong></div>
<div>类型: <a href="/Types/#Function">Function</a>()</div>
<div>每次事件触发时会执行的函数。</div>
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<span class="version-details">添加的版本: <a href="/category/version/1.4.3/">1.4.3</a></span>.dblclick(  [eventData ], handler(eventObject) )</h4>
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<div><strong>eventData</strong></div>
<div>类型: <a href="/Types/#Object">Object</a>
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<div>一个对象，它包含的数据键值对映射将被传递给事件处理程序。</div>
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<div><strong>handler(eventObject)</strong></div>
<div>类型: <a href="/Types/#Function">Function</a>()</div>
<div>每次事件触发时会执行的函数。</div>
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<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.dblclick()</h4>
<ul><li><div class="null-signature">这个方法不接受任何参数</div></li></ul>
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<p>这个函数的前两个用法是 <code>.bind('dblclick', handler)</code> 的快捷方式，第3个不带参数的用法是 <code>.trigger('dblclick')</code> 的快捷方式。一个元素被双击时将触发 <code>dblclick</code> 事件。任何HTML元素都可以收到此事件。请看下面的HTML：
			
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<pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">id</span>=<span class="value">"target"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  Double-click here</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">id</span>=<span class="value">"other"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  Trigger the handler</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div></pre>
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<p>这个事件处理器可以绑定到任何 <code>&lt;div&gt;</code>:</p>
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<pre><div class="container"><div class="line"><code>$(<span class="string">'#target'</span>).dblclick(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code>  alert(<span class="string">'Handler for .dblclick() called.'</span>);</code></div></div><div class="container"><div class="line"><code>});</code></div></div></pre>
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<p>现在，如果我们双击这个元素，警报显示：</p>
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<span class="output">Handler for .dblclick() called.</span>
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<p>应用不带参数的<code>.dblclick()</code>，我们可以手动触发这个事件:</p>
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<pre><div class="container"><div class="line"><code>$(<span class="string">'#other'</span>).click(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code>  $(<span class="string">'#target'</span>).dblclick();</code></div></div><div class="container"><div class="line"><code>});</code></div></div></pre>
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<p>这些代码执行后，单击<span class="output">Trigger the handler</span>同样警报显示。</p>
<p><code>dblclick</code>事件只有在满足以下条件的情况下才能被触发：</p>
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<li>鼠标指针在元素里面时点击。</li>
<li>鼠标指针在元素里面时释放。</li>
<li>鼠标指针在元素里面时再次点击，点击间隔时间，是系统而定。</li>
<li>鼠标指针在元素里面时再次释放。</li>
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<p>在同一元素上同时绑定 <code>click</code> 和 <code>dblclick</code> 事件是不可取的。各个浏览器事件触发的顺序是不同的，一些浏览器在<code>dblclick</code>之前接受两个 <code>click</code> 事件 ，而和其它浏览器只接受一个 click 事件。用户往往可通过不同的操作系统和浏览器配置双击灵敏度（两次点击之间的最大时间被检测为双击）。
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<section class="entry-examples" id="entry-examples"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-0">
<h4>Example: <span class="desc">在段落上双击时，显示 "Hello World!" 提示框：</span>
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<pre><div class="container"><div class="line"><code>$(<span class="string">"p"</span>).dblclick( <span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span> alert(<span class="string">"Hello World!"</span>); });</code></div></div></pre>
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<h4>Example: <span class="desc">双击时改变背景色。</span>
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<pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">div</span> <span class="rules">{ <span class="rule"><span class="attribute">background</span>:<span class="value">blue;</span></span></span></code></div></div><div class="container"><div class="line"><code>        <span class="rule"><span class="attribute">color</span>:<span class="value">white;</span></span></code></div></div><div class="container"><div class="line"><code>        <span class="rule"><span class="attribute">height</span>:<span class="value"><span class="number">100</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>        <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">150</span>px;</span></span></code></div></div><div class="container"><div class="line"><code> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">div</span><span class="class">.dbl</span> <span class="rules">{ <span class="rule"><span class="attribute">background</span>:<span class="value">yellow;</span></span><span class="rule"><span class="attribute">color</span>:<span class="value">black;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code>  <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span><span class="tag">&lt;<span class="title">span</span>&gt;</span>Double click the block<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>  <span class="keyword">var</span> divdbl = $(<span class="string">"div:first"</span>);</code></div></div><div class="container"><div class="line"><code>  divdbl.dblclick(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code>    divdbl.toggleClass(<span class="string">'dbl'</span>);</code></div></div><div class="container"><div class="line"><code>  });</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div></pre>
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<h4>Demo:</h4>
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