Which way is better, setInterval() or window.setInterval()?

Question

Ok so there is a couple things to this question.

First of all, i'm asking this for setTimeout() and for setInterval()

I have seen a couple different ways to call them and i'm wondering which way is the best for this circumstance..

I'm making a js/canvas game and I'm just looking over my draw interval (where it loops the draw method)

Anyways, here are the different ways I have seen...

Part A:

1. Using window.

   drawInterval = window.setInterval(draw, 60);
   

2. Not using window.

   drawInterval = setInterval(draw, 60);
   

Part B:

1. Not using quotes and brackets around the function name

   drawInterval = setInterval(draw, 60);
   

2. Using quotes and brackets around the function name

   drawInterval = setInterval("draw()", 60);
   

So for Part A: should i use window. or not? And what about window.clearInterval() vs clearInterval by itself?

And for Part B: should I use quotes and brackets or not? I was told before that it was a bad idea to use quotes and brackets for this situation.

Answer 1

1. Unless you've declared your own locally scoped setInterval function, there's no difference between setInterval and window.setInterval.

2. The second form uses an implied eval(). This should be avoided when possible because it presents the potential for code injection.

Answer 2

1. window is the global object. Whether or not you use it explicitly is something of a matter of style, but as a Python developer, I think explicit is better.

2. If you use quotes, the setInterval() essentially "evals" the statement. That's bad. Don't use the quotes.