How many JavaScript types?

Question

I realize that the JavaScript DOM API, jQuery, and JavaScript for <canvas> are three different types of JS. Are these the only three?

Answer 1

Well I wouldn't consider them as "types" as JavaScript is always equal to JavaScript. What you refer to are extensions, API's or commonly called libraries. They are written firstly in JS, and there are so many I couldn't list them here. You in fact can make one of the aforementioned too if wanted.

Answer 2

Well, what are the most common?