React (also called React.js or ReactJS) is an open-source Javascript library. It is mainly used for building user interfaces and single-page or mobile applications. React was created by Jordan Walke, a software engineer at Facebook, and it is maintained by Facebook.
Like AngularJS and Vue.js, React makes it easier to create dynamic applications. One of its most notable features is the use of components. Each piece of the UI is considered a component (e.g., a search box or a table). When building an application, components are like lego bricks waiting to be put together. These components can be reused in different parts of the application and also changed without affecting the rest of the application.
Another important feature is the Virtual Document Object Model (Virtual DOM). Virtual DOM is a copy of the website’s DOM. When the user interacts with the site, then usually (meaning without Virtual DOM) the whole DOM is updated to make the necessary change. But React uses the copy to see what parts of the actual DOM need updating and selectively updates only these sections. This improves the application’s performance, making it considerably faster.
Find out more about React from its homepage.
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