jquery 遍历 children([expr])
children()从当前匹配元素集合中得到各个元素第一层子集集合，形成新的元素集合。返回匹配元素集合
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><script src="http://code.jquery.com/jquery-latest.js"></script> <script>$(document).ready(function(){ $("#container").click(function (e) { $("*").removeClass("hilite"); var $kids = $(e.target).children(); var len = $kids.addClass("hilite").length; $("#results span:first").text(len); $("#results span:last").text(e.target.tagName); e.preventDefault(); return false; });});</script><style>body { font-size:16px; font-weight:bolder; }div { width:130px; height:82px; margin:10px; float:left; border:1px solid blue; padding:4px; }#container { width:auto; height:105px; margin:0; float:none; border:none; }.hilite { border-color:red; }#results { display:block; color:red; }p { margin:10px; border:1px solid transparent; }span { color:blue; border:1px solid transparent; }input { width:100px; }em { border:1px solid transparent; }a { border:1px solid transparent; }b { border:1px solid transparent; }button { border:1px solid transparent; }</style></head><body><div id="container"> <div> <p>This <span>is the <em>way</em> we</span> write <em>the</em> demo,</p> </div> <div> <a href="#"><b>w</b>rit<b>e</b></a> the <span>demo,</span> <button>write the</button> demo, </div> <div> This <span>the way we <em>write</em> the <em>demo</em> so</span> <input type="text" value="early" /> in </div> <p> <span>t</span>he <span>m</span>orning. <span id="results">Found <span>0</span> children in <span>TAG</span>.</span> </p></div></body></html>
var $kids = $(e.target).children();
将得到点击后匹配元素集合中第一层子集元素集合。
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