>I think the main reason "this" is considered confusing is that many programmers learning JS have already spent years coding in Java or C#. They expect it to wo

>I think the main reason "this" is considered confusing is that many programmers learning JS have already spent years coding in Java or C#. They expect it to work the same, then get frustrated when it doesn't. But the reason it doesn't is due to the fact that functions in JS are first-class, and don't intrinsically belong to a particular class and object instance they way they do in those languages. As such, the context represented by "this" has to be more fluid in JS. As someone who’s “native” language is JS, I think that’s spot on. I never had the baggage of thinking in terms of Java or C++, and so I couldn’t understand why people would get confused over “this” because it was fundamental to learning the language and thus to my mental model of programming in general.