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
2 points
this is very handy when you want to carry over some shared context. Justin Fagnani described this as an implicit first argument, which is a model that helped me understand how to use it better.