前端学习（442）：回调函数

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>函数参数</title>
</head>
<body>
    <script>
    function fn5(o,fn){
        o.a+=1;
        fn(o);
    }
    function fn6(_o){
        _o.a+=10;
    }
    function fn7(_o){
        _o.b=20;
    }
    var obj4={a:1};
    fn5(obj4,fn7);
    console.log(obj4);
    </script>
</body>
</html>

运行结果

来源：CSDN

作者：你知道歌谣吗？

链接：https://blog.csdn.net/weixin_43392489/article/details/104041038

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