AngularJS vs Angular 2 vs Angular 4: What’s the Difference?

What is Angular JS? AngularJS was created by Misko Heavey. He had built a framework to handle the downfalls of HTML and also taking ideas and best practices of the libraries which were never done earlier. This first version of the framework known as AngularJS was launched in the year 2009. It laid the foundation of the present-day front-end application development. Angular JS was one of the best single-page application development solutions. Gradually, its wide adoption and become very popular.