(function($){...})(jQuery)

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="jquery-1.9.0.min.js"></script>
<title>Insert title here</title>

<script type="text/javascript">
$(function(){
    
    //匿名函数,形参$ ,实参"bb"
    (function($){alert($);})("bb");
    //等价于
    var c = function(param){alert(param);}
    c("aa");
    //这样写的好处,避免变量污染,让匿名函数立即执行
    
    alert($);
});

</script>
</head>
<body>

<input type="button"  disabled="disabled"  id="aaa"  />

</body>
</html>

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转载自www.cnblogs.com/lxh520/p/9154023.html
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