new 做了什么

2024-10-07 05:39:14

    var a=function(){

      this.che1 = function () { console.log(1) }

      this.che2 = function () { console.log(2) }

      this.che3=function(){console.log(3)}

    }

    var b= new a();

    var c={};

    c.__proto__ = a.prototype;

    a.call(c);

    console.log(b)

    console.log(c)

　　

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