There's too many subfields etc. to make a suggestion. What areas in particular are you interested in?
Another relevant question is where are you in your journey so far? What have you already read? etc.
Another relevant question is where are you in your journey so far? What have you already read? etc.
In particular, I'd like to contribute to a library or a framework so I guess that would mean understanding the reasoning and the fundaments of why/how the library was created. Whether that means understanding design patterns of Javascript specifically or software fundamentals, I'm not sure.
Sorry if this still sounds too broad, but I'm growing quite bored of working as a typical developer and need a bit of guidance.