mirror of
https://github.com/Hopiu/jquery-mobile.git
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174 lines
No EOL
6.6 KiB
HTML
174 lines
No EOL
6.6 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div class="ui-page">
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<div class="ui-header">
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<h1>.children()</h1>
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</div>
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<div class="ui-content ui-body ui-body-c" id="children1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.children( [ 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 children of each element in the set of matched elements, optionally filtered by a selector.</p>
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<ul class="signatures"><li class="signature" id="children-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>.children( [ 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>.children()</code> method allows us to search through the immediate children of these elements in the DOM tree and construct a new jQuery object from the matching elements. The <code>.find()</code> and <code>.children()</code> methods are similar, except that the latter only travels a single level down 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>$()</code> function. If the selector is supplied, the elements will be filtered by testing whether they match it.</p>
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<p>Consider a page with a basic nested list on it:</p>
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<pre>
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<ul class="level-1">
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<li class="item-i">I</li>
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<li class="item-ii">II
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<ul class="level-2">
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<li class="item-a">A</li>
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<li class="item-b">B
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<ul class="level-3">
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<li class="item-1">1</li>
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<li class="item-2">2</li>
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<li class="item-3">3</li>
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</ul>
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</li>
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<li class="item-c">C</li>
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</ul>
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</li>
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<li class="item-iii">III</li>
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</ul>
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</pre>
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<p>If we begin at the level-2 list, we can find its children:</p>
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<pre>$('ul.level-2').children().css('background-color', 'red');</pre>
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<p>The result of this call is a red background behind items A, B, and C. Since we do not supply a selector expression, all of the children are part of the returned jQuery object. If we had supplied one, only the matching items among these three would be 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">Find all children of the clicked element.</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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body { font-size:16px; font-weight:bolder; }
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div { width:130px; height:82px; margin:10px; float:left;
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border:1px solid blue; padding:4px; }
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#container { width:auto; height:105px; margin:0; float:none;
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border:none; }
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.hilite { border-color:red; }
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#results { display:block; color:red; }
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p { margin:10px; border:1px solid transparent; }
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span { color:blue; border:1px solid transparent; }
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input { width:100px; }
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em { border:1px solid transparent; }
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a { border:1px solid transparent; }
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b { border:1px solid transparent; }
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button { border:1px solid transparent; }
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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 id="container">
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<div>
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<p>This <span>is the <em>way</em> we</span>
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write <em>the</em> demo,</p>
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</div>
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<div>
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<a href="#"><b>w</b>rit<b>e</b></a> the <span>demo,</span> <button>write
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the</button> demo,
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</div>
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<div>
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This <span>the way we <em>write</em> the <em>demo</em> so</span>
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<input type="text" value="early" /> in
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</div>
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<p>
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<span>t</span>he <span>m</span>orning.
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<span id="results">Found <span>0</span> children in <span>TAG</span>.</span>
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</p>
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</div>
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<script>
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$("#container").click(function (e) {
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$("*").removeClass("hilite");
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var $kids = $(e.target).children();
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var len = $kids.addClass("hilite").length;
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$("#results span:first").text(len);
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$("#results span:last").text(e.target.tagName);
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e.preventDefault();
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return false;
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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 all children of each div.</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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body { font-size:16px; font-weight:bolder; }
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span { color:blue; }
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p { margin:5px 0; }
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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 (this is a paragraph)</p>
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<div><span>Hello Again (this span is a child of the a div)</span></div>
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<p>And <span>Again</span> (in another paragraph)</p>
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<div>And One Last <span>Time</span> (most text directly in a div)</div>
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<script>$("div").children().css("border-bottom", "3px double red");</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-2">
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<h4>Example: <span class="desc">Find all children with a class "selected" of each div.</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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body { font-size:16px; font-weight:bolder; }
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p { margin:5px 0; }
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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>
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<span>Hello</span>
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<p class="selected">Hello Again</p>
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<div class="selected">And Again</div>
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<p>And One Last Time</p>
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</div>
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<script>$("div").children(".selected").css("color", "blue");</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> |