原型中定义的变量是否与对象共享？ [英] variable defined in prototype are shared accross objects?

问题描述

我创建了对象

e this
testObj.prototype = {
    cVar: 15,
    init: function(c){
        /*initialization code*/
        this.cVar = c;
    }
};

var a = new testObj(10);
var b = new testObj(20);

现在两个对象的cVar值都是20.它们是否共享变量？我如何为每个对象获得单独的变量？

Now both object's cVar values is 20. Are they sharing the variable? How i can get seperate variable for each object?

推荐答案

是的，它们是共享的。对于单独的属性，在构造函数中定义它们：

Yes, they're shared. For separate properties, define them inside the constructor:

function Ctor() {
    this.notShared = 1;
};

Ctor.prototype.shared = 2;

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