To be an efficient web
developer you need to learn Angular JS, it has been developed in order to
simplify both the development and the testing of web applications by providing
a framework for client-side MVC and MVVM architectures, along with components
commonly used in rich Internet applications.
React JS is used for
building user interface. REACT / React JS is open source library created by
Facebook. Which allows to develop reusable components. It’s very popular
behind it hence a great option to build your career.