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lunakunada

一段 javascript 构造函数的疑惑,为什么构造函数不是 Base?

  •  
  •   lunakunada · Jun 22, 2017 · 3402 views
    This topic created in 3428 days ago, the information mentioned may be changed or developed.

    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 replies  •  2017-06-22 21:08:56 +08:00
    lunakunada
    lunakunada
    OP
    Jun 22, 2017
    1
    检查了下~傻掉了,下面有一段 Base.prototype = {...},了解了,问题处理了~
    lijsh
    lijsh
    Jun 22, 2017
    2
    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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