Question

My Code is Simple

var core ={
  f: function(obj){
    console.log(toString.call(obj));
  }
}

Which should display [object Function]
if I pass another function to it like core.f(function(){}),

and it does the same if I paste the core.f in Chrome inspector.
But that anonymous function becomes [object Object] if the core.f is loaded through a script with <script src>

Answer 1

If you’re testing in a console, they probably have a local toString that resolves to Object.prototype.toString.

You should make your own local reference if you don’t want the full prototype path.

---

In Chrome, I show a different toString than window.toString…

window.toString === toString; // false

---

The toString reference does successfully resolve to Object.prototype.toString…

Object.prototype.toString === toString; // true

…so you can see that they’ve created their own local reference that shadows the global.