历史对象的原型链？

Question

Which one is correct? 哪一个是正确的？

Chrome returns false Chrome返回false

Object.getPrototypeOf(Object.getPrototypeOf(history)) === Object.prototype
false

Fireforx return true Fireforx返回true

Object.getPrototypeOf(Object.getPrototypeOf(history)) === Object.prototype
true

Answer 1

Both. 都。

The specification doesn't precise the type of the object or how the browser creates it, but only an interface. 规范不精确对象的类型或浏览器如何创建它，而只是一个接口。