this-使用call . apply

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    <meta charset="UTF-8">
    <title>Document</title>
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    <script type="text/javascript">

        var name = 'this is window';  //定义window的name属性,看this.name是否会调用到 
        var testObj1 = { 
            name : 'this is testObj1', 
            getName:function(){ 
                console.log(this);   //控制台输出: testObj2  //this指向的是testObj2对象 
                console.log(this.name);  //控制台输出: this is testObj2   
            } 
        } 

        var testObj2 = { 
            name: 'this is testObj2' 
        } 

        testObj1.getName.apply(testObj2); 
        testObj1.getName.call(testObj2);

    </script>
</body>
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原文地址:https://www.cnblogs.com/dexin/p/6337104.html