jquery first selector
Translation results：
first
UK[fɜ:st] US[fɜ:rst]
n.First, initially; first class; number one,; [乐] Treble part
adv.First time; earliest, first; rather; priority
adj. First-rate; initial, earliest; basic, summary; treble
num.First
jquery first selectorsyntax
Function: :first selector selects the first element. Most common usage: Used with other elements to select the first element in a specified combination (like the example above).
Syntax: $(":first")
jquery first selectorexample
<html>
<head>
<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p:first").css("background-color","#B2E0FF");
});
</script>
</head>
<body>
<html>
<body>
<h1>Welcome to php中文网</h1>
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<p>php手册</p>
<p>php词典</p>
<div id="choose">
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<ul>
<li>php教程视频</li>
<li>php手册</li>
<li>php词典</li>
</ul>
</div>
</body>
</html>
</body>
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