Reactjs Introduction

introduction

1. 1ReactJS is a JavaScript library made to build user interfaces – like buttons, forms, and pages on websites.
2. 2It was created by engineers at Facebook to make their apps faster and easier to manage.
3. 3React helps you build single-page applications (SPAs), where the page doesn't reload again and again.
4. 4Instead of writing one big messy file, you break your UI into small, reusable parts called components.
5. 5It uses something called a Virtual DOM to update only the parts of the page that change – this makes it super fast.
6. 6You write code using JSX – a mix of HTML and JavaScript – which looks easy and feels natural.
7. 7React makes sure data flows in one direction (top to bottom), so it's easier to track changes.
8. 8You can also manage your app's data using something called state and props.
9. 9React can be used with other tools like Redux, Next.js, or even mobile apps with React Native.
10. 10It's super popular today – used in real-world apps like Instagram, Netflix, and of course, Facebook.