javascript - `throw new Error` 和 `throw Error` 之间的区别？

Question

这个问题在这里已经有了答案:





throw Error('msg') vs throw new Error('msg')

(2 个回答)


24 天前关闭。




没有 new 时抛出错误有什么缺点吗？关键词？

throw new Error('Something went wrong');

/* vs */

throw Error('Something went wrong');

Answer 1

它们完全一样，保证 by the specification :

19.5.1 The Error Constructor

The Error constructor:

...

creates and initializes a new Error object when called as a function rather than as a constructor. Thus the function call Error(…) is equivalent to the object creation expression new Error(…) with the same arguments.