React JS

React JS is a JavaScript toolkit that allows you to create reusable user interface components. The following is the definition from the official React documentation:

It is a library that allows you to create modular user interfaces. It supports the development of reusable user interface components that display data that varies over time. React is frequently used as the V in MVC. React separates the DOM from you, resulting in a more straightforward programming approach and improved speed.

React can also use Node to render on the server and React Native to power native apps. One-way reactive data flow is implemented in React, which reduces boilerplate and makes it easier to reason about than traditional data binding.