React Introduction

• React, sometimes referred to as a frontend JavaScript framework, is a JavaScript library created by Facebook.
• React is a tool for building UI components.

How does React Work?

• React creates a VIRTUAL DOM in memory.
• Instead of manipulating the browser's DOM directly, React creates a virtual DOM in memory, where it does all the necessary manipulating before making changes in the browser DOM.
• React only changes what needs to be changed.
• React identifies the specific changes required and updates only those parts, reducing unnecessary browser rendering.

React.JS History

• The current version of React.JS is V18.0.0 (April 2022).
• The initial release to the public (V0.3.0) was in July 2013.
• React.JS was first used in 2011 for Facebook's Newsfeed feature.
• It was created by Facebook Software Engineer, Jordan Walke.
• The current version of create-react-app is v5.0.1 (April 2022).
• create-react-app includes built-in tools such as webpack, Babel, and ESLint.