Which js framework is worth learning?

Question

Angular

Now I am on the verge of new discoveries and I would like to ask the community what is better to study in order to develop promising onepage js-apps.
Looked at polymer.js, angular.js at the rest. The polymer with web components attracted with its modularity, angular popularity. About the polymer, something is not heard in Runet at all. In Google, mostly articles are not the first freshness in English. Although the polymer out of the box supports material design, which, as it were, hints that the project is keeping up with the times.
what do you suggest?

Answer 1

Now I'm on the threshold of new discoveries

discover the search on the site or Google, the topic is sucked up 10 times a week.
In general, in the long term - Angular2, in the short term - React + Flux. Only these two have some kind of well-defined and fairly correct philosophy. If you deal with this matter, then transferring to other toys will not be a problem in which case.

Answer 2

ReactJS is trending right now.

Answer 3

Backbone, Angular