Understanding THIS in Javascript, i got lost

Question

So i am messing around with Javascript and one thing caught my attention.

The variable THIS, and working on it i was wondering, if i have this function:

var someFn = function(){ console.log(this); }

and i run someFn() obviously it will console the Window, but is there, anyway i can make that exact same function console a string? And not a object?

I've tried many ways, even:

someFn.call("A Nice String");

But it will break the string into an object on each letter.

Is there any way?

Answer 1

In loose mode, this is always an object. Strings, numbers and booleans will be wrapped (which is what you see, an array-like String object), null and undefined will be replaced with the global object (window in browsers).

If you use strict mode, it will work as expected:

function someFn(){ "use strict"; console.log(this); }
someFn(); // undefined
someFn.call("A nice string"); // A nice string