javascript - Accessing a function call that is within grouping operators

Question

I have the following line of code:

(function f() {});

Is there a way we can reference f() outside of the grouping?

Answer 1

感谢 javascript 的泄漏分配，你总是可以得到（几乎）任何表达式的值：

 (function f() {}).valueOf() // == function f() {}

Answer 2

(function f() {}).prototype.constructor

Answer 3

Esailija's answer is innovative but it misses the point. For example if you're using the function expression as follows then using .prototype.constructor makes no sense:

window.addEventListener("DOMContentLoaded", (function f() {}), false);

In such a case I prefer making the function expression a function declaration instead and replacing the expression with the function name:

window.addEventListener("DOMContentLoaded", (f), false);

function f() {}

The above program is perfectly valid. You can call a function declaration before it appears in the program. Now you can reference f "outside of its grouping". It's kind of like cheating but then again this is the way people normally do it (minus the unnecessary parentheses).