一段 Javascript 构造函数的疑惑,为什么构造函数不是 Base? - V2EX
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一段 Javascript 构造函数的疑惑,为什么构造函数不是 Base?

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  •   lunakunada 2017-06-22 20:57:32 +08:00 2656 次点击
    这是一个创建于 3041 天前的主题,其中的信息可能已经有所发展或是发生改变。

    代码来自 Base.js。
    截图中红框里的 proto,取它的构造函数 proto.constructor 为什么返回 Object ?

    一般来说:

     function T(){}; var t = new T; 

    t.constructor 会返回 T 吧,求解释?

    Untitled-1.jpg

    2 条回复    2017-06-22 21:08:56 +08:00
    lunakunada
        1
    lunakunada  
    OP
       2017-06-22 21:07:38 +08:00
    检查了下~傻掉了,下面有一段 Base.prototype = {...},了解了,问题处理了~
    lijsh
        2
    lijsh  
       2017-06-22 21:08:56 +08:00
    prototype 上的 constructor 被改写了呗,本来实例上的 constructor 就是取自 prototype
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