Honestly, so few people know what they're actually talking about with JS, it's really hard to make any recommendations. There's a tendency these days to treat JS as a "low level" language (lol, I know) and everyone is scrambling to figure out what the best other language to get that "compiles" to JS (lloll, I double know).
As long as you're following very basic principles of OO and Functional Programming, not writing sloppy code, you're going to be fine. There are some cross-browser issues you will have to watch out for, but you'll find them with experience and figure out how to get around them. JS isn't hard, just spend a little time with it and you'll know what to do.