I just had my review and for the first time in a few years, I got 100% of my bonus. Learning Webpack and React helped a bit as well as getting more stuff done at the beginning of a sprint instead of the end. To keep my programming skills up to date, what else should I learn right now?
how about some more core Javascript<p><a href="https://github.com/getify/You-Dont-Know-JS" rel="nofollow">https://github.com/getify/You-Dont-Know-JS</a>
If you haven't done much on the backend (databases, web servers, server-side web frameworks, etc.), then taking some time to familiarize yourself with what is going on there might be worth it. Even if you don't end up doing any work on the backend, you will have a better understanding of what is going on. I would start with the technologies in use at your current company.<p>Edit: clarification
You might be already doing this with your React/Webpack, but picking up some ES6 might be a good thing to do.<p>I've slowly been adding some ES6 into my code and there are some really nice things.
I concur with TurboHaskai, stop worrying about the next hot thing, focus on building solid applications that are flexible, maintaining, user friendly and solves a business problem.