Absolutely agree with the parent comment. That said, you can look at stuff like the HN who's hiring trends, or StackOverflow trends: http://www.ryan-williams.

Absolutely agree with the parent comment. That said, you can look at stuff like the HN who's hiring trends, or StackOverflow trends: http://www.ryan-williams.net/hacker-news-hiring-trends/2016/june.html http://www.ryan-williams.net/hacker-news-hiring-trends/2016/... http://stackoverflow.com/research/developer-survey-2016 http://stackoverflow.com/research/developer-survey-2016 Personally I'd invest in mastering React, but YMMV.