React JS is the most popular JS library for building UI (User Interfaces), which is created by Facebook. We can build fast Single Page, modern Applications, or websites with React. So, the question here arises is why React is so important. Let’s put some light on the features of react.

Features of React JS

1. Reusable UI components: Consider the Flipkart website, I want the same header on checkout, listing and account page etc. So, it’s better we should make one common
   component and import in all other modules.
2. **React Virtual DOM: **In React, Virtual DOM exists, which is like a lightweight copy of the actual DOM. Virtual DOM improves app performance since JS virtual DOM is faster than the regular DOM.

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