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93 lines
9.8 KiB
HTML
93 lines
9.8 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">.removeData()</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/data/">数据操作</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/miscellaneous/">杂项</a> > <a href="/category/miscellaneous/data-storage/">数据存储</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/removeData/" target="_blank">.removeData()</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="removeData1"><h2 class="section-title">
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<span class="name">.removeData( [name ] )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span>
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</h2>
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<div class="entry-wrapper">
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<p class="desc"><strong>描述: </strong>在元素上移除绑定的数据</p>
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<ul class="signatures">
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<li class="signature" id="removeData-name">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.2.3/">1.2.3</a></span>.removeData( [name ] )</h4>
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<ul><li>
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<div><strong>name</strong></div>
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<div>类型: <a href="/Types/#String">String</a>
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</div>
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<div>要移除的存储数据名.</div>
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</li></ul>
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</li>
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<li class="signature" id="removeData-list">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.7/">1.7</a></span>.removeData( [list ] )</h4>
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<ul><li>
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<div><strong>list</strong></div>
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<div>类型: <a href="/Types/#Array,String">Array,String</a>
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</div>
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<div>一个数组或空间分隔的字符串命名要删除的数据块。</div>
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</li></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>
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<code>.removeData()</code>方法允许我们移除用<code>.data()</code>绑定的值。当带name参数调用的时候，<code>.removeData()</code>将删除那个特有的值，当不带任何参数的时候，所有的值将被移除。从jQuery的内部<code>.data()</code> 缓存不影响任何在文档中的HTML5的<code>data-</code>属性，使用<code>.removeAttr()</code>可以移除这些属性。</p>
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<p>当使用<code>.removeData("name")</code>时，如果没有这个属性名字是在内部数据缓存，jQuery将试图在元素上找到一个 <code>data-</code>的属性。为了避免重复查询 <code>data-</code> 属性，将这个名称设置为无论是<code>null</code> 或 <code>undefined</code>的值(例如 <code>.data("name", undefined)</code>)，而不是使用<code>.removeData()</code>。</p>
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<p><strong>从jQuery 1.7开始</strong>, 当所谓的键数组或一个空间分隔键的字符串，<code>.removeData()</code>删除在该数组或字符串的每一个键值。</p>
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<p><strong>至于jQuery 1.4.3</strong>,调用的<code>.removeData()</code>将导致属性值被删除恢复到DOM中的名称相同的数据属性的值，而不是设置<code>undefined</code>。</p>
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</div>
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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">
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<h4><span class="desc">Set a data store for 2 names then remove one of them.</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>
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<td class="code">
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<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">margin</span>:<span class="value"><span class="number">2</span>px;</span></span> <span class="rule"><span class="attribute">color</span>:<span class="value">blue;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">span</span> <span class="rules">{ <span class="rule"><span class="attribute">color</span>:<span class="value">red;</span></span> <span class="rule">}</span></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>value1 before creation: <span class="tag"><<span class="title">span</span>></span><span class="tag"></<span class="title">span</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>value1 after creation: <span class="tag"><<span class="title">span</span>></span><span class="tag"></<span class="title">span</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>value1 after removal: <span class="tag"><<span class="title">span</span>></span><span class="tag"></<span class="title">span</span>></span><span class="tag"></<span class="title">div</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">div</span>></span>value2 after removal: <span class="tag"><<span class="title">span</span>></span><span class="tag"></<span class="title">span</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> </code></div></div><div class="container"><div class="line"><code> $(<span class="string">"span:eq(0)"</span>).text(<span class="string">""</span> + $(<span class="string">"div"</span>).data(<span class="string">"test1"</span>));</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"div"</span>).data(<span class="string">"test1"</span>, <span class="string">"VALUE-1"</span>);</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"div"</span>).data(<span class="string">"test2"</span>, <span class="string">"VALUE-2"</span>);</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"span:eq(1)"</span>).text(<span class="string">""</span> + $(<span class="string">"div"</span>).data(<span class="string">"test1"</span>));</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"div"</span>).removeData(<span class="string">"test1"</span>);</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"span:eq(2)"</span>).text(<span class="string">""</span> + $(<span class="string">"div"</span>).data(<span class="string">"test1"</span>));</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"span:eq(3)"</span>).text(<span class="string">""</span> + $(<span class="string">"div"</span>).data(<span class="string">"test2"</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">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>
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</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></section>
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</div></article> </div>
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</article> |