11 best JavaScript Web Application libraries in 2025

JavaScript is an object-oriented and functional programming language, used primarily for web development. JavaScript is a computer programming language. It is web based and used to build client side web applications. JavaScript has become very popular in the recent years because of its simplicity, flexibility and easiness to work with it. JavaScript is a dynamic programming language, which means that the code can be changed at runtime by making changes to the program's "state" rather than recompiling and restarting the application. There are lots of open source libraries available for JavaScript, which are used by developers to create web applications easily. JavaScript Web Application Open Source libraries provides a wide range of features like flexbox, grid system and virtual DOM. There are several popular JavaScript Web Application open source libraries available for developers: awesome-selfhosted - Free Software network services and web applications; nw.js - js modules directly from DOM/WebWorker and enable a new way; hackathon-starter - A boilerplate for Node.js web applications.