没有矛盾。只是不要考虑嵌套对象：对象的直接属性总是在其原型上或在自己的属性上。属性值是否为基元或对象与无关紧要。
所以，当你这样做
var parent = {
x: {a:0}
};
var child = Object.create(parent);
child.x将引用与parent.x-一个{a:0}对象相同的对象。当您更改其属性时：
var prop_val = child.x; // == parent.x
prop_val.a = 1;
两者都会受到影响。要独立更改“嵌套”属性，您首先必须创建一个独立的对象：
child.x = {a:0};
child.x.a = 1;
parent.x.a; // still 0
你能做的是
child.x = Object.create(parent.x);
child.x.a = 1;
delete child.x.a; // (child.x).a == 0, because child.x inherits from parent.x
delete child.x; // (child).x.a == 0, because child inherits from parent
which means they are not absolutely independent - but still two different objects.
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