In this article, I am going to explain ReactJS and the three main pillars of ReactJS, which are component, state, and props.
ReactJS
ReactJS is an open-source front-end technology. It is a Javascript library for developing UI components. It is a single-page application, and we can use it as a multi-page application, also. Facebook introduced ReactJS. Javascript and other libraries are very slow for updating or loading DOM, but ReactJS is faster for updating and loading DOM. So ReactJS has good performance than other libraries. It is more flexible. ReactJs introduced Virtual DOM. For example, suppose we want to create an e-commerce application in general. In that case, we start by creating individual pages and multiple components like a dashboard page (button, link, text, image, etc.) and a home page(button, link, text). Still, by using React, we can create custom components for some of the widely used elements like buttons or Texts that can be made reusable in the entire application. To be more specific, the Text box has properties like length, size, validations, shades, and other properties, but to keep the end user interactive, we always use a particular style and stick to it. Hence customizing and reusing makes a lot of sense.