this-纯函数

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <script type="text/javascript">

        var name = 'this is window';  //定义window的name属性 
            function getName(){ 
                   console.log(this);    //控制台输出: Window  //this指向的是全局对象--window对象 
                   console.log(this.name);  //控制台输出: this is window  / 
            } 
            
            getName(); //相当 window  window.getName();

    </script>
</body>
</html>

原文地址:https://www.cnblogs.com/dexin/p/6337078.html