insert
English [?n?s?:rt]
vt. ??; ??(?? ????) ??; ?? ??? ??? ?? ???); ?? ??
before英[b??f?r,-?for]
prep.before; ?...
conj....; ??...
adv.
jquery insertBefore() ??? ???
??: insertBefore() ???? ??? ?? ?? HTML ??? ?? ??? ?????. ? ??? ?? ??? ???? ??? ?? ???? ???? ??? ?? ?? ?????.
??: ??$(content).insertBefore(selector)
????:
| ???? | Description |
| content | ?????. ??? ??? ?????. ??? ?: ??? ??? HTML ?? |
| selector | ?????. ??? ??? ??? ??? ?????. |
jquery insertBefore() ??? ?
<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(){
$("button").click(function(){
$("<span>你好！</span>").insertBefore("p");
});
});
</script>
</head>
<body>
<p>這是一個(gè)段落。</p>
<p>這是另一個(gè)段落。</p>
<button>在每個(gè) p 元素之前插入 span 元素</button>
</body>
</html>??? ????? ??? "???? ??" ??? ?????