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114 lines
6.0 KiB
HTML
114 lines
6.0 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">.error()</h1>
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<div class="entry-meta">
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所属分类:<span class="category"><a href="/category/events/">事件</a> > <a href="/category/events/browser-events/">浏览器事件</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/deprecated/">弃用</a> > <a href="/category/deprecated/deprecated-1.8/">1.8 版本弃用的 API</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/removed/">已删除的函数</a></span>
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<span class="pull-right">英文文档:<a href="https://api.jquery123.com/error/" target="_blank">.error()</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="error1"><h2 class="section-title">
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<span class="name">.error( handler(eventObject) )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span><span class="version-details">version deprecated: <a href="/category/version/1.8/">1.8</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>为 JavaScript 的 "error" 事件绑定一个处理函数。</p>
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<ul class="signatures">
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<li class="signature" id="error-handlereventObject">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.error( handler(eventObject) )</h4>
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<ul><li>
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<div><strong>handler(eventObject)</strong></div>
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<div>类型: <a href="/Types/#Function">Function</a>()</div>
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<div>每当事件触发时执行的函数。</div>
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</li></ul>
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</li>
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<li class="signature" id="error-eventData-handlereventObject">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.4.3/">1.4.3</a></span>.error( [eventData ], handler(eventObject) )</h4>
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<ul>
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<li>
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<div><strong>eventData</strong></div>
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<div>类型: <a href="/Types/#Object">Object</a>
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</div>
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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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</li>
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<li>
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<div><strong>handler(eventObject)</strong></div>
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<div>类型: <a href="/Types/#Function">Function</a>()</div>
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<div>每当事件触发时执行的函数。</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>这个方法是 <code>.bind('error', handler)</code> 的快捷方式。</p>
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<p><code>error</code>事件被发送到元素,比如一张图片被引用,由浏览器加载。如果没有正确载入,这个事件就会被调用。</p>
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<p>例子,考虑一个简单的图像页面:</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">
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<div class="line n1">1</div>
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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="tag"><<span class="title">img</span> <span class="attribute">alt</span>=<span class="value">"Book"</span> <span class="attribute">id</span>=<span class="value">"book"</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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<p>事件处理器可以绑定到图像上:</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">
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<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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</td>
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<td class="code">
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<pre><div class="container"><div class="line"><code>$(<span class="string">'#book'</span>)</code></div></div><div class="container"><div class="line"><code> .error(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> alert(<span class="string">'Handler for .error() called.'</span>)</code></div></div><div class="container"><div class="line"><code> })</code></div></div><div class="container"><div class="line"><code> .attr(<span class="string">"src"</span>, <span class="string">"missing.png"</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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<p>如果图像无法加载(例如,因为目前所提供的URL不存在),警告显示:</p>
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<p>
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<span class="output">Handler for .error() called.</span>
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</p>
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<blockquote>
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<p>
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这个事件处理程序必须在浏览器触发<code>error</code>事件之前绑定,这就是为什么示例绑定的处理函数后设置src属性。此外,当页面保存到本地的时候此事件可能无法正确触发。由于<code>error</code>依赖于正常的HTTP状态码,如果URL使用<code>file:</code>协议,它通常不会被触发。</p>
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</blockquote>
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<p>注意:一个jQuery的error事件处理器不应该附加到window对象上。当一个脚本错误的时候,浏览器就会触发 window 的 error 事件。无论如何, window 的 error 事件接收不同的参数和返回值与传统的事件不一样。若要绑定 window 的 error 事件,请使用<code>window.onerror</code>代替。
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</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">为 IE 用户隐藏 "无效的图片" 图标,并使用自定义图片来代替。:</span></h4>
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<div class="syntaxhighlighter javascript ">
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<table>
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<tbody>
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<tr>
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<td class="gutter">
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<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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</td>
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<td class="code">
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<pre><div class="container"><div class="line"><code>$(<span class="string">"img"</span>)</code></div></div><div class="container"><div class="line"><code> .error(<span class="keyword">function</span>(){</code></div></div><div class="container"><div class="line"><code> $(<span class="keyword">this</span>).hide();</code></div></div><div class="container"><div class="line"><code> })</code></div></div><div class="container"><div class="line"><code> .attr(<span class="string">"src"</span>, <span class="string">"missing.png"</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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</div></section>
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</div></article> </div>
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</article> |