What to learn next as a rails developer?

Question

JavaScript

I have been programming on rails for about 4 years, since I work on the backend 90 percent of the time, I know the frontend superficially, but if you want to write something using jquery, it’s not difficult.
I want to move further towards the front-end, since complex interfaces are required, there is a dilemma, what to study? Angular, backbone or others? To be honest, I don’t really need a single-page application, it only requires more responsiveness on some pages, I like Two-way Data Binding in Angular.

Answer 1

I would recommend trying Web Components and Polymer