javascript: Assign method and string to the same property name

Question

I know I'm going to get the people who say I simply shouldn't do this, but I am curious how people accomplish it.

I know I've seen where you can type the name of a property and get one value, but then you add the parenthesis to the end and it accesses a method.

Visually, I'm saying this:

foo returns 'bar'
foo() performs a function

The question is how?

Answer 1

This isn't possible, due to how properties are resolved on objects. This is the only thing that comes remotely close:

function f() {
  return 'I am being returned from the function.';
}

f.toString = function () {
  return 'I am a property on the variable.';
}

console.log('f() says: ' + f());
console.log('f says: ' + f);

It relies on the fact that JS typecasts functions via the .toString method in certain scenarios.