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120 lines
No EOL
4.5 KiB
HTML
120 lines
No EOL
4.5 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>.parent()</h1>
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</div>
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<div data-role="content" data-theme="c" id="parent1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.parent( [ selector ] )</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>Get the parent of each element in the current set of matched elements, optionally filtered by a selector.</p>
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<ul class="signatures"><li class="signature" id="parent-selector">
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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>.parent( [ selector ] )</h4>
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<p class="arguement"><strong>selector</strong>A string containing a selector expression to match elements against.</p>
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</li></ul>
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<div class="longdesc">
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<p>Given a jQuery object that represents a set of DOM elements, the <code>.parent()</code> method allows us to search through the parents of these elements in the DOM tree and construct a new jQuery object from the matching elements. The <code>.parents()</code> and <code>.parent()</code> methods are similar, except that the latter only travels a single level up the DOM tree.</p>
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<p>The method optionally accepts a selector expression of the same type that we can pass to the <code>$()</code> function. If the selector is supplied, the elements will be filtered by testing whether they match it.</p>
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<p>Consider a page with a basic nested list on it:</p>
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<pre>
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<ul class="level-1">
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<li class="item-i">I</li>
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<li class="item-ii">II
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<ul class="level-2">
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<li class="item-a">A</li>
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<li class="item-b">B
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<ul class="level-3">
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<li class="item-1">1</li>
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<li class="item-2">2</li>
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<li class="item-3">3</li>
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</ul>
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</li>
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<li class="item-c">C</li>
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</ul>
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</li>
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<li class="item-iii">III</li>
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</ul>
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</pre>
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<p>If we begin at item A, we can find its parents:</p>
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<pre>$('li.item-a').parent().css('background-color', 'red');</pre>
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<p>The result of this call is a red background for the level-2 list. Since we do not supply a selector expression, the parent element is unequivocally included as part of the object. If we had supplied one, the element would be tested for a match before it was included.</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">Shows the parent of each element as (parent > child). Check the View Source to see the raw html.</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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div,p { margin:10px; }
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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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<div>div,
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<span>span, </span>
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<b>b </b>
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</div>
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<p>p,
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<span>span,
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<em>em </em>
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</span>
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</p>
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<div>div,
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<strong>strong,
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<span>span, </span>
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<em>em,
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<b>b, </b>
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</em>
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</strong>
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<b>b </b>
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</div>
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<script>
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$("*", document.body).each(function () {
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var parentTag = $(this).parent().get(0).tagName;
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$(this).prepend(document.createTextNode(parentTag + " > "));
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});
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</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">Find the parent element of each paragraph with a class "selected".</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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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<div><p>Hello</p></div>
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<div class="selected"><p>Hello Again</p></div>
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<script>$("p").parent(".selected").css("background", "yellow");</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> |