Which JS library I should learn first. If I know JS basics or whatever I learned from solo learn in JavaScript?

Question

Any suggestions? I am confused which is more in demand, simple, easy to learn and can start if I know javascript basic?
1) Node.js
2) Angular.js
3) React.js
Or Any other.?

Answer 1

Node.js is not a library nor a framework...
Node.js is an standalone implementation of ECMScript as JS, but primarly dedicated to server side (even if also of general purpose) while JS is dedicated to client side (and only runnable inside a browser). Main difference is that Node.js doesn't have implementation of the web APIs (cannot manipulate a DOM nor any modern Html5 APIs). Conversely, Node.JS has features/API that JS doesn't have (access to the file system, APIs for handle HTTP request/response...).

Angular.js, React.js or also Vue.js are framework to dynamicaly build/update DOM in a convenient way.
I do not use any, but I've looked at them and personaly (your question has only one objective response: the one wich inspire you, that's a taste question) if I should start with one of them my choice would be Vue.js ;)

Answer 2

I've personally learned a bit of React.js through Codecademy. This framework has been developed through Facebook but I'm not entirely sure what the demand of the framework is.