prepend

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jquery prepend() ??? ???

??: prepend() ???? ??? ??? ?? ??(?? ??)? ??? ??? ?????. prepend() ? prependTo() ???? ??? ??? ????. ???? ??? ????. ??? ???? ??? prependTo() ??? ???? ??? ??? ? ??? ?????.

??: ??$(selector).prepend(content)

????:

ParametersDescription
content ?????. ??? ???? ?????(HTML ?? ?? ??).

??? ???? ??? ??: ??? ???? ??? ??? ?? ??? ??? ???? ?????.

??: ??$(selector).prepend(function(index,html))

????:

???? Description
function(index,html) ?????. ??? ??? ???? ??? ?????.
index????. ???? ??? ??? ?????.
html ????. ???? ?? HTML? ?????.

jquery prepend() ??? ?

<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(){
    $("p").prepend("<b>Hello world!</b> ");
  });
});
</script>
</head>
<body>
<p>This is a paragraph.</p>
<p>This is another paragraph.</p>
<button>在每個 p 元素的開頭插入內(nèi)容</button>
</body>
</html>
???? ?? ?

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