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新对象等价问题 #202

@nutbrain

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@nutbrain

阮老师您好,我发现js教程->面向对象编程->Object对象的相关方法->3.Object.create()中的代码段:obj1,obj2,obj3中,obj1和其他的两个是否有细微差别?obj1的原型对象是{},{}的原型对象是Object.prototype. 而obj2和obj3的原型对象都是Object.prototype.原型链的长度不一样,这里是否不等价?

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