javascript - 调用与调用函数

Question

到目前为止，我认为“调用”和“调用”函数的含义是相同的。然而，在 YouTube 教程中，它说要通过调用来调用函数。我的第一个想法是措辞有误，但在 W3Schools 的 page 上在函数调用上，它说:

It is common to use the term "call a function" instead of "invoke a function" ... In this tutorial, we will use invoke, because a JavaScript function can be invoked without being called.

好的，所以有区别。它是什么？

Answer 1

您的引用文本:

It is common to use the term "call a function" instead of "invoke a function" ... In this tutorial, we will use invoke, because a JavaScript function can be invoked without being called.

现在让我重新表述一下:

It is common to use the term "call a function" instead of "invoke a function" ... In this tutorial, we will use the term invoke instead of call, because a JavaScript function can be invoked indirectly like fn.call() and fn.apply() without being called directly like fn().

因此，当我执行 fn() 时，它会被直接调用，而当我像 fn.call() 那样执行时，它会被间接调用，但在这两种情况下，函数正在被调用。否则，我在这里看不出有什么区别，我也可以说我可以通过多种方式调用函数，例如:

fn(); // I'm calling it
fn.call(); // I'm calling it
fn.apply(); // I'm calling it

所以，区别在于语义，但在我看来，两者是可以互换的。顺便说一句，我在上面的问题下写了一条评论，我想把它放在这里，即:

IMO, that's a misleading statement. Maybe there are some indication of call/apply or something else but it's totally confusing.