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297 lines
26 KiB
HTML
297 lines
26 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">.slideDown()</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/effects/">特效</a> > <a href="/category/effects/sliding/">滑动</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/slideDown/" target="_blank">.slideDown()</a></span>
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</div><!-- .entry-meta -->
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</header><!-- .entry-header -->
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<!-- .entry-header -->
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<div class="entry-content">
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<article class="entry method" id="slideDown1">
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<h2 class="section-title"> <span class="name">.slideDown( [duration ] [, complete ] )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span> </h2>
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<div class="entry-wrapper">
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<p class="desc"><strong>描述: </strong>用滑动动画显示一个匹配元素。</p>
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<ul class="signatures">
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<li class="signature" id="slideDown-duration-complete">
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<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.slideDown( [duration ] [, complete ] )</h4>
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<ul>
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<li>
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<div> <strong>duration</strong> (默认: <code>400</code>)</div>
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<div>类型: <a href="/Types/#Number">Number</a> or <a href="/Types/#String">String</a> </div>
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<div>一个字符串或者数字决定动画将运行多久。</div>
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</li>
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<li>
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<div><strong>complete</strong></div>
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<div>类型: <a href="/Types/#Function">Function</a>()</div>
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<div>在动画完成时执行的函数。</div>
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</li>
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</ul>
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</li>
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<li class="signature" id="slideDown-options">
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<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.slideDown( options )</h4>
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<ul>
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<li>
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<div><strong>options</strong></div>
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<div>类型: <a href="/Types/#PlainObject">PlainObject</a>
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</div>
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<div>一组包含动画选项的值的集合。 支持的选项:</div>
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<ul>
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<li>
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<div>
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<strong>duration</strong> (default: <code>400</code>)
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</div>
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<div>Type: <a href="http://api.jquery.com/Types/#Number">Number</a> or <a href="http://api.jquery.com/Types/#String">String</a>
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</div>
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<div>一个字符串或者数字决定动画将运行多久。（注：默认值: "normal"， 三种预定速度的字符串("slow", "normal", 或
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"fast")或表示动画时长的毫秒数值(如：1000) ）
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</div>
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</li>
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<li>
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<div>
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<strong>easing</strong> (default: <code>swing</code>)
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</div>
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<div>Type: <a href="http://api.jquery.com/Types/#String">String</a>
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</div>
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<div>一个字符串，表示过渡使用哪种缓动函数。（注：jQuery自身提供"linear" 和 "swing"，其他效果可以使用<a href="http://gsgd.co.uk/sandbox/jquery/easing/">jQuery Easing Plugin</a>插件）
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</div>
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</li>
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<li>
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<div>
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<strong>queue</strong> (default: <code>true</code>)
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</div>
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<div>Type: <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> or <a href="http://api.jquery.com/Types/#String">String</a>
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</div>
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<div>
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一个布尔值，指示是否将动画放置在效果队列中。如果为false时，将立即开始动画。 <strong>从jQuery1.7开始</strong>，队列选项也可以接受一个字符串，在这种情况下，在动画被添加到由该字符串表示的队列中。当一个自定义的队列名称被使用，动画不会自动启动;你必须调用<code>.dequeue("queuename")</code>来启动它。
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</div>
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</li>
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<li>
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<div><strong>specialEasing</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#PlainObject">PlainObject</a>
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</div>
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<div>一组一个或多个通过相应的参数和相对简单函数定义的CSS属性 ( <a href="/category/version/1.4/">1.4</a> 新增)
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</div>
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</li>
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<li>
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<div><strong>step</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Number">Number</a> now, <a href="http://api.jquery.com/Types/#Tween">Tween</a> tween )
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</div>
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<div>
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每个动画元素的每个动画属性将调用的函数。这个函数为修改Tween 对象提供了一个机会来改变设置中得属性值。
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</div>
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</li>
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<li>
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<div><strong>progress</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Number">Number</a> progress, <a href="http://api.jquery.com/Types/#Number">Number</a> remainingMs )
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</div>
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<div>
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每一步动画完成后调用的一个函数，无论动画属性有多少，每个动画元素都执行单独的函数。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
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</div>
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</li>
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<li>
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<div><strong>complete</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>()</div>
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<div>在动画完成时执行的函数。</div>
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</li>
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<li>
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<div><strong>done</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
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</div>
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<div>在动画完成时执行的函数。 (他的Promise对象状态已完成).<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
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</div>
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</li>
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<li>
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<div><strong>fail</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
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</div>
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<div>
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动画失败完成时执行的函数。(他的Promise对象状态未完成)。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
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</div>
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</li>
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<li>
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<div><strong>always</strong></div>
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<div>Type: <a href="http://api.jquery.com/Types/#Function">Function</a>( <a href="http://api.jquery.com/Types/#Promise">Promise</a> animation, <a href="http://api.jquery.com/Types/#Boolean">Boolean</a> jumpedToEnd )
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</div>
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<div>
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在动画完成或未完成情况下停止时执行的函数。(他的Promise对象状态已完成或未完成)。<span class="version-details"> (version added: <a href="/category/version/1.8/">1.8</a>)</span>
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</div>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="signature" id="slideDown-duration-easing-complete">
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<h4 class="name"> <span class="version-details">添加的版本: <a href="/category/version/1.4.3/">1.4.3</a></span>.slideDown( [duration ] [, easing ] [, complete ] )</h4>
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<ul>
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<li>
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<div> <strong>duration</strong> (默认: <code>400</code>)</div>
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<div>类型: <a href="/Types/#Number">Number</a> or <a href="/Types/#String">String</a> </div>
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<div>一个字符串或者数字决定动画将运行多久。</div>
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</li>
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<li>
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<div> <strong>easing</strong> (默认: <code>swing</code>)</div>
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<div>类型: <a href="/Types/#String">String</a> </div>
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<div>一个字符串，表示过渡使用哪种缓动函数。（译者注：jQuery自身提供"linear" 和 "swing"，其他可以使用相关的插件）</div>
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</li>
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<li>
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<div><strong>complete</strong></div>
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<div>类型: <a href="/Types/#Function">Function</a>()</div>
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<div>在动画完成时执行的函数。</div>
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</li>
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</ul>
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</li>
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</ul>
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<div class="longdesc" id="entry-longdesc">
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<p><code>.slideDown()</code>方法将给匹配元素的高度的动画，这会导致页面的下面部分滑下去，弥补了显示的方式。</p>
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<p>持续时间（duration）是以毫秒为单位的，数值越大，动画越慢，不是越快。字符串 <code>'fast'</code> 和 <code>'slow'</code> 分别代表200和600毫秒的延时。如果提供任何其他字符串，或者这个duration参数被省略，那么默认使用<code>400</code> 毫秒的延时。</p>
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<p>我们可以给任何元素做动画，比如一个简单的图片：</p>
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<div class="syntaxhighlighter xml nogutter">
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<table>
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<tbody>
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<tr>
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<td class="gutter"><div class="line n1">1</div>
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<div class="line n2">2</div>
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<div class="line n3">3</div>
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<div class="line n4">4</div></td>
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<td class="code"><pre><div class="container"><div class="line"><code><span class="tag"><<span class="title">div</span> <span class="attribute">id</span>=<span class="value">"clickme"</span>></span></code></div></div><div class="container"><div class="line"><code> Click here</code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">img</span> <span class="attribute">id</span>=<span class="value">"book"</span> <span class="attribute">src</span>=<span class="value">"book.png"</span> <span class="attribute">alt</span>=<span class="value">""</span> <span class="attribute">width</span>=<span class="value">"100"</span> <span class="attribute">height</span>=<span class="value">"123"</span> /></span></code></div></div>
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</pre></td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>最初是隐藏的元素，我们可以慢慢显示：</p>
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<div class="syntaxhighlighter javascript nogutter">
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<table>
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<tbody>
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<tr>
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<td class="gutter"><div class="line n1">1</div>
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<div class="line n2">2</div>
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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</div></td>
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<td class="code"><pre><div class="container"><div class="line"><code>$(<span class="string">'#clickme'</span>).click(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> $(<span class="string">'#book'</span>).slideDown(<span class="string">'slow'</span>, <span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> <span class="comment">// Animation complete.</span></code></div></div><div class="container"><div class="line"><code> });</code></div></div><div class="container"><div class="line"><code>});</code></div></div>
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</pre></td>
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</tr>
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</tbody>
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</table>
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</div>
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<p class="image four-across"> <img alt="" src="/resources/0042_06_17.png"/> <img alt="" src="/resources/0042_06_18.png"/> <img alt="" src="/resources/0042_06_19.png"/> <img alt="" src="/resources/0042_06_20.png"/> </p>
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<h4 id="easing">Easing(缓冲函数)</h4>
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<p><strong>从jQuery 1.4.3开始</strong>,一个可选的字符串类型的easing参数，用于确定使用的缓冲函数。缓动函数指定用于动画进行中在不同点位的速度。jQuery默认只提供两个缓冲效果：调用 <code>swing</code>, 在一个恒定的速度进行；调用 <code>linear</code>. 更多的缓动函数要使用的插件，最显着的是<a href="http://jqueryui.com/">jQuery UI suite</a>（译者注：或<a href="http://gsgd.co.uk/sandbox/jquery/easing/">jQuery Easing Plugin</a>插件）。</p>
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<h4 id="callback-function">Callback Function（回调函数）</h4>
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<p>如果提供回调函数参数，<code>callback</code>会在动画完成的时候调用。将不同的动画串联在一起按顺序排列执行是非常有用的。这个回调函数不设置任何参数，但是<code>this</code>会设成将要执行动画的那个DOM元素，如果多个元素一起做动画效果，那么要非常注意，回调函数会在每一个元素执行完动画后都执行一次，而不是这组动画整体才执行一次。</p>
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<p><strong>从jQuery 1.6开始</strong>，<code><a href="/promise">.promise()</a></code>方法可以用来配合<code><a href="/deferred.done">deferred.done()</a></code> 方法一起使用，用于当所有匹配的元素执行完各自的动画后，再调用一个回调函数。( 查看 <a href="/promise">.promise() 例子</a> )。</p>
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</div>
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<h3>Additional Notes(其他注意事项):</h3>
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<div class="longdesc">
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<ul>
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<li>所有jQuery效果，包括<code>.slideDown()</code>,都能通过设置<code>jQuery.fx.off = true</code>全局的关闭，，效果等同于将动画持续时间（duration ）参数设置成 0。更多信息查看 <a href="/jquery.fx.off">jQuery.fx.off</a>。</li>
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<li>
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如果<code>.slideDown()</code>被一个无序列表（<code><ul></code>）调用并且<code><li></code>元素有定位属性（position:relative, absolute, 或者 fixed），这个效果在IE6至IE9以下可能无法正常工作，为了解决这个问题，<code><ul></code>需要触发"haslayout"。<code>ul</code>元素上添加<code>position: relative;</code> 和<code>zoom: 1;</code>CSS声明。
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</li>
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</ul>
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</div>
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<section class="entry-examples" id="entry-examples">
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<header>
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<h2 class="underline">例子:</h2>
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</header>
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<div class="entry-example" id="example-0">
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<h4>Example: <span class="desc">用 600 毫秒让所有的 div 下滑显示出来。</span> </h4>
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<div class="syntaxhighlighter xml ">
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<table>
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<tbody>
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<tr>
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<td class="gutter"><div class="line n1">1</div>
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<div class="line n2">2</div>
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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</div>
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<div class="line n6">6</div>
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<div class="line n7">7</div>
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<div class="line n8">8</div>
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<div class="line n9">9</div>
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<div class="line n10">10</div>
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<div class="line n11">11</div>
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<div class="line n12">12</div>
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<div class="line n13">13</div>
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<div class="line n14">14</div>
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<div class="line n15">15</div>
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<div class="line n16">16</div>
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<div class="line n17">17</div>
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<div class="line n18">18</div>
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<div class="line n19">19</div>
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<div class="line n20">20</div>
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<div class="line n21">21</div>
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<div class="line n22">22</div>
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<div class="line n23">23</div>
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<div class="line n24">24</div>
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<div class="line n25">25</div>
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<div class="line n26">26</div>
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<div class="line n27">27</div></td>
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<td class="code"><pre><div class="container"><div class="line"><code><span class="doctype"><!DOCTYPE html></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">html</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">style</span>></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"><span class="hexcolor">#de9a44</span>;</span></span> <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">3</span>px;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">80</span>px;</span></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">40</span>px;</span></span> <span class="rule"><span class="attribute">display</span>:<span class="value">none;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">style</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>></span><span class="javascript"></span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code> Click me!</code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">div</span>></span><span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">div</span>></span><span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">div</span>></span><span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">script</span>></span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(document.body).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code><span class="keyword">if</span> ($(<span class="string">"div:first"</span>).is(<span class="string">":hidden"</span>)) {</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).slideDown(<span class="string">"slow"</span>);</code></div></div><div class="container"><div class="line"><code>} <span class="keyword">else</span> {</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).hide();</code></div></div><div class="container"><div class="line"><code>}</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">html</span>></span></code></div></div>
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</pre></td>
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</tr>
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</tbody>
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</table>
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</div>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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||
<div class="entry-example" id="example-1">
|
||
<h4>Example: <span class="desc">用 1000 毫秒让所有文本框组件下滑显示出来。动画完成后改变这些文本框的外观，并让中间的文本框获得输入焦点。</span> </h4>
|
||
<div class="syntaxhighlighter xml ">
|
||
<table>
|
||
<tbody>
|
||
<tr>
|
||
<td class="gutter"><div class="line n1">1</div>
|
||
<div class="line n2">2</div>
|
||
<div class="line n3">3</div>
|
||
<div class="line n4">4</div>
|
||
<div class="line n5">5</div>
|
||
<div class="line n6">6</div>
|
||
<div class="line n7">7</div>
|
||
<div class="line n8">8</div>
|
||
<div class="line n9">9</div>
|
||
<div class="line n10">10</div>
|
||
<div class="line n11">11</div>
|
||
<div class="line n12">12</div>
|
||
<div class="line n13">13</div>
|
||
<div class="line n14">14</div>
|
||
<div class="line n15">15</div>
|
||
<div class="line n16">16</div>
|
||
<div class="line n17">17</div>
|
||
<div class="line n18">18</div>
|
||
<div class="line n19">19</div>
|
||
<div class="line n20">20</div>
|
||
<div class="line n21">21</div>
|
||
<div class="line n22">22</div>
|
||
<div class="line n23">23</div>
|
||
<div class="line n24">24</div>
|
||
<div class="line n25">25</div>
|
||
<div class="line n26">26</div>
|
||
<div class="line n27">27</div>
|
||
<div class="line n28">28</div>
|
||
<div class="line n29">29</div>
|
||
<div class="line n30">30</div>
|
||
<div class="line n31">31</div>
|
||
<div class="line n32">32</div>
|
||
<div class="line n33">33</div>
|
||
<div class="line n34">34</div></td>
|
||
<td class="code"><pre><div class="container"><div class="line"><code><span class="doctype"><!DOCTYPE html></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">html</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">style</span>></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"><span class="hexcolor">#cfd</span>;</span></span> <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">3</span>px;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">50</span>px;</span></span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">text-align</span>:<span class="value">center;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span> <span class="rule"><span class="attribute">cursor</span>:<span class="value">pointer;</span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">border</span>:<span class="value"><span class="number">2</span>px outset black;</span></span> <span class="rule"><span class="attribute">font-weight</span>:<span class="value">bolder;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag">input</span> <span class="rules">{ <span class="rule"><span class="attribute">display</span>:<span class="value">none;</span></span> <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">120</span>px;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">10</span>px;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">style</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>></span><span class="javascript"></span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span>></span>Push!<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> /></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> <span class="attribute">class</span>=<span class="value">"middle"</span> /></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">input</span> <span class="attribute">type</span>=<span class="value">"text"</span> /></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">script</span>></span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code>$(<span class="keyword">this</span>).css({ borderStyle:<span class="string">"inset"</span>, cursor:<span class="string">"wait"</span> });</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"input"</span>).slideDown(<span class="number">1000</span>,<span class="keyword">function</span>(){</code></div></div><div class="container"><div class="line"><code>$(<span class="keyword">this</span>).css(<span class="string">"border"</span>, <span class="string">"2px red inset"</span>)</code></div></div><div class="container"><div class="line"><code>.filter(<span class="string">".middle"</span>)</code></div></div><div class="container"><div class="line"><code> .css(<span class="string">"background"</span>, <span class="string">"yellow"</span>)</code></div></div><div class="container"><div class="line"><code> .focus();</code></div></div><div class="container"><div class="line"><code>$(<span class="string">"div"</span>).css(<span class="string">"visibility"</span>, <span class="string">"hidden"</span>);</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">html</span>></span></code></div></div>
|
||
</pre></td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<h4>Demo:</h4>
|
||
<div class="demo code-demo"></div>
|
||
</div>
|
||
</section>
|
||
</div>
|
||
</article>
|
||
</div>
|
||
</article> |