变量和函数声明提升

python基础教程

于 2016-12-12 15:23:37 发布

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分类专栏： 01前端基础教程html_css_js

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<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>

</body>
</html>
<script>
    //变量声明提升
    function test() {
        var a = "1";
        var f = function(){};
        var b = "2";
        var c = "3";
    }

    //上述代码等价于
    function test() {
    var a,f,b,c;
    a = "1";
    f = function(){};
    b = "2";
    c = "3";
}

</script>