size

English [sa?z] US [sa?z]

n. , ?? ??? ??

adj.

jquery ??() ??? ???

??: size() ???? jQuery ???? ???? ?? ?? ?????.

??: ??$(selector).size()

jquery ??() ??? ?

<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(){
  $("button").click(function(){
    alert($("li").size());
  });
});
</script>
</head>
<body>
<button>輸出 li 元素的數(shù)目</button>
<ul>
<li>Coffee</li>
<li>Milk</li>
<li>Soda</li>
</ul>
</body>
</html>
???? ?? ?

??? ????? ??? "???? ??" ??? ?????