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97 lines
No EOL
4 KiB
HTML
97 lines
No EOL
4 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, minimum-scale=1, maximum-scale=1"><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div data-role="page">
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<div data-role="header">
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<h1>.addClass()</h1>
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</div>
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<div data-role="content" data-theme="c" id="addClass1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.addClass( className )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
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</h2>
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<div class=" entry-details">
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<p class="desc"><strong>Description: </strong>Adds the specified class(es) to each of the set of matched elements.</p>
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<ul class="signatures">
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<li class="signature" id="addClass-className">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.0/">1.0</a></span>.addClass( className )</h4>
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<p class="arguement"><strong>className</strong>One or more class names to be added to the class attribute of each matched element.</p>
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</li>
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<li class="signature" id="addClass-functionindex, class">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.addClass( function(index, class) )</h4>
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<p class="arguement"><strong>function(index, class)</strong>A function returning one or more space-separated class names to be added. Receives the index position of the element in the set and the old class value as arguments.</p>
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</li>
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</ul>
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<div class="longdesc">
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<p>It's important to note that this method does not replace a class. It simply adds the class, appending it to any which may already be assigned to the elements.</p>
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<p>More than one class may be added at a time, separated by a space, to the set of matched elements, like so:</p>
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<pre>$('p').addClass('myClass yourClass');</pre>
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<p>This method is often used with <code>.removeClass()</code> to switch elements' classes from one to another, like so:</p>
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<pre>$('p').removeClass('myClass noClass').addClass('yourClass');</pre>
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<p>Here, the <code>myClass</code> and <code>noClass</code> classes are removed from all paragraphs, while <code>yourClass</code> is added.</p>
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<p>As of jQuery 1.4, the <code>.addClass()</code> method allows us to set the class name by passing in a function.</p>
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<pre>$('ul li:last').addClass(function() {
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return 'item-' + $(this).index();
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});</pre>
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<p>Given an unordered list with five <code><li></code> elements, this example adds the class "item-4" to the last <code><li></code>.</p>
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</div>
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<h3>Examples:</h3>
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<div id="entry-examples" class="entry-examples">
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<div id="example-0">
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<h4>Example: <span class="desc">Adds the class 'selected' to the matched elements.</span>
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</h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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p { margin: 8px; font-size:16px; }
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.selected { color:blue; }
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.highlight { background:yellow; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<p>Hello</p>
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<p>and</p>
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<p>Goodbye</p>
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<script>$("p:last").addClass("selected");</script>
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</body>
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</html></code></pre>
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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 id="example-1">
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<h4>Example: <span class="desc">Adds the classes 'selected' and 'highlight' to the matched elements.</span>
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</h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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p { margin: 8px; font-size:16px; }
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.selected { color:red; }
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.highlight { background:yellow; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<p>Hello</p>
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<p>and</p>
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<p>Goodbye</p>
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<script>$("p:last").addClass("selected highlight");</script>
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</body>
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</html></code></pre>
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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>
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</div>
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</div>
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</div>
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</body></html> |