I had trouble with this at first, but an easy thing to remember is that "this" is scoped dynamically; as many have noted before, you can easily create a lexical

I had trouble with this at first, but an easy thing to remember is that "this" is scoped dynamically; as many have noted before, you can easily create a lexical "that" or "self" reference from it, but the other way around is impossible. This dynamic scope is a bit strange when everything else has local scope but it can be quite powerful. When "this" gives you a hard time, the Function.bind() method is often a good solution too.