Front-End
ReactJS
ReactJS is the most popular open-source library today. It was developed and is primarily driven by Facebook and is known for its strength in creating modern mobile-ready user interfaces.
AngularJS
Angular JS is a flexible framework maintained by Google. This is a popular choice for creating dynamic web applications and front-end systems for the enterprise.
VueJS
Vue.js is an open-source model–view–viewmodel front end JavaScript framework for building user interfaces and single-page applications. It was created by Evan You, and is maintained by him and the rest of the active core team members.
jQuery
jQuery is a library that consists of pre-written JavaScript code. It is the most extendable library that allows you to simplify the way you use JavaScript on your website's front-end through a single line of code.