What is React?
React is a JavaScript library used to build user interfaces (UI) for websites and web applications.
It helps developers create fast, interactive, and reusable web pages.
Created by: Meta (Facebook)
Example websites that use React:
Facebook
Instagram
Netflix
WhatsApp Web
Why do we use React?
Without React:
We write lots of JavaScript
Updating the page is difficult
Code becomes large
With React:
Code is shorter
Easy to manage
Faster updates
Reuse the same code many times
What is a Component?
A Component is a small piece of a webpage
Think of a webpage like a house
House → Webpage
Room → Component
Example:
Web Page
├── Header
├── Menu
├── Profile
├── Products
├── Footer
Each part is a component
Why Components?
Instead of writing the same code again and again, we create it once and reuse it
Example:
<Button />
<Button />
<Button />
One Button component can be used many times
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