UI application frameworks help in reducing the amount of effort required to get a complex web application up and running. They prevent us from reinventing the wheel, being able to rely on well tested reusable code is neat.
If you are confused about chosing a UI Framework for your next big project, take a look at TodoMVC project, which is a collection of implementations of a simple Todo app. From vanilla JS, to libraries like Dojo, Jquery and frameworks like React, ANgularJS, Angular4 and Ember (plus many more), they have created the same ToDo App in almost every major library/framework out there.
TodoMVC project is created and managed by Add Osmani who works at Google currently.
Once you’ve downloaded the TodoMVC code and played around with the apps, you can easily decide on a specific framework to try out.
What I’d suggest is to study the syntax required for defining models, views and controllers and classes in the frameworks you’re interested in and try your hand at editing the code to see how it feels using it first-hand.
Check out the project at it’s official website: