js中this的指向

zd7130a5

于 2022-07-31 08:54:00 发布

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文章标签： javascript

本文链接：https://blog.youkuaiyun.com/beyondx/article/details/126081506

<!--@description-->
<!--@author beyondx-->
<!--@date Created in 2022/07/31/ 8:03-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <script>
        // this运行在 哪个对象下, this 就指向 哪个对象
        var o1 = {
            age: 18,
            fun: function() {
                console.log(this.age);
            }
        }

        var o2 = {
            age: 16,
            fun: o1.fun
        }

        o2.fun(); // expected 16
    </script>
</body>
</html>