Understanding JavaScript Function Invocation and “this” →
Over the years, I’ve seen a lot of confusion about JavaScript function invocation. In particular, a lot of people have complained that the semantics of `this` in function invocations is confusing.
In my opinion, a lot of this confusion is cleared up by understanding the core function invocation primitive, and then looking at all other ways of invoking a function as sugar on top of that primitive. In fact, this is exactly how the ECMAScript spec thinks about it. In some areas, this post is a simplification of the spec, but the basic idea is the same.
