If you follow the trend I will say React/Redux are the best employable options (you can learn React without Redux by the way ^^)... Vue.js is a very good framework even React core developers say they take inspiration from the work done with vue.js . And yeah before learning to use any framework it is fundamental to get the basics learning from JS/ES6, there is some accidental complexity in using any Framework, so it's important to have references in Vanilla, liter library and more structured library/framework like React/Redux who is not suitable for all application (but yeah in our industry we love the one solution to rule them all). Don't forget three years ago Angular was the hot framework (ember, durandal... was behind), today it's React (vue.js), so don't spend your time learning every new framework and don't get too attached to a framework but rather learn the reason behind the use of this framework (more functional style, event based, message based, reactive...). And keep an open mind and open eyes in what will be the next thing.

I attended and organized conference, I believe it's a good way to learn and meet interesting peoples, I don't like mainstream conference to be honest (like the ones organized by vendor or the techno centric ones, I don't like tutorial like talks ;o) ), but more conference which will give you new insights and to think out of the box. In general what I like the more in conference is the discussions with people between talks and the workshops (if there is workshops options before or after conference take'm and pick some hands-on sessions in conf). The conference I initiated with a friend is NCrafts (in Paris, France go for it if you can ^^) Other conference that I love : Buildstuff (EU), Codemesh (EU), Lambda days (EU) and StrangeLoop (US) Notice that all this conferences publish the videos in their website, so the point for attending in person is to take proper times to do it (because you will never take the time to watch all the videos you want lol) and to share with others, the discussions are the most valuable think in conferences. My 2 cents

I would like to use the same language at work than the one I use at home ^^, now I am learning Haskell and Elm (and work in c# and JS)

(I would love to be able to provide a simple and comprehensive answer as I had some hard time myself to understand this term, here is a try) Monad is mathematical abstraction and an other name (more meaningful for developer) would be computation builder. Let's say it is a way to chain operations (with bind operation), and what make Monad useful for us is that every monad is different (so it do something more than just chaining). And this is how for a language like Haskell which is pure (no side-effect in function) we can accomplish I/O and other useful stuff. More elaborated answer here : http://stackoverflow.com/questions/44965/what-is-a-monad

@maruru I really didn't appreciate the judgement and your borderline comment about Chinese... That's totally inappropriate (And for your knowledge there is a lot of Asian/chinese in the top company, I feel sorry for you to have to precise this). Well I don't know your experience and you don't know mine, and it is not about faking, it's what this company ask for (facebook will give you 6 months to prepare the interview, and they will give you the book to read and problem to train yourself to solve), so this is for them the normal process, because they know that the majority of developers will not be able to remember BFS or DFS or Djikistra from the top of there head.

Let's talk about the top tech companies (facebook, google...), if you don't prepare the interview you will never pass the first phone interview...

Even if Javascript is the only native browser language, there is plenty of options to write web application (elmlang, typescript, coffescript, fsharp...), in this case javascript is the browser language ><

I would say it depends on you :-), the amount of time you are dedicating to this learning and what is the goal of your learning. It's easier to start learning a language in your current environment, for example learning Scala if you are a Java developer or learning F# (OCaml-like) if you are a c#. If you wanna master functional programming thinking, maybe Haskell or Idris are the best school (language fully based in the concept of function as mathematical entity, pure as they don't have side effects). I will love to learn Elixir or Erlang but more for the beauty of OTP and the elegance of the actor model than the languages themself. Clojure is an interesting language (lisp family) and JVM world, but here you are more in the dynamic world (vs strong type system as Haskell or Idris), so it may be an option if you are interested by an elegant implementation of a dynamic language. You can add many other interesting languages to the list (like Elm-lang which is a very intersting option if you want to do web development using a functional language) So every language have his pros and cons, define your goal and the amount of time you will dedicate for this learning, if you can experience different language that will be even better. Cheers

High order function, pure function, lambda are everywhere, even if you are not using a pure/mostly functional language (Haskell, F#, Clojure, elm...), you can use some functional programming techniques. And after I have learned a functional language, I feel the influence whatever language I use (javascript, c#...)