在 Javascript 中是否有等效于 .apply 的不改变 this 的值? [英] In Javascript is there equivalent to .apply that doesn't change the value of this?

问题描述

看起来很简单，我想用参数数组调用一个函数.当然，我可以说 func.apply(this, ['some', 'arguments']); 但这会改变 func<中 this 的值/代码>.知道如何在不改变它的情况下做到这一点吗?

Seems easy enough, i want to call a function with array of arguments. Sure, i can say func.apply(this, ['some', 'arguments']); but that will change the value of this inside func. Any idea how to do this without changing it?

推荐答案

注意，在 ES6 中你也可以这样写:

Note that in ES6 you can also write:

func(...someArray)

这里this变成了func里面的Window，没什么用.但是如果你写:

Here this becomes Window inside func, which is of no use. But if you write:

obj.func(...someArray)

this 在 func 里面会是 obj.

这可能是我 5 年前寻找的功能，但那是 5 年前，所以谁记得:)

This may be the feature i was looking for 5 years ago, but that was 5 years ago, so who remembers :)

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