Скачать или смотреть Introduction to ReactJS | What is React & Why Use It?

What is ReactJS?
ReactJS is an open-source JavaScript library developed by Facebook, used to build user interfaces (UIs) for web applications. It focuses on building single-page applications (SPAs) that are fast, interactive, and scalable.

Key Features of ReactJS

Component-Based → UI is divided into reusable components.
Virtual DOM → Improves performance by updating only changed parts of the UI.
Declarative → You describe what the UI should look like, React takes care of updates.
JSX (JavaScript XML) → A syntax extension that allows writing HTML-like code inside JavaScript.
One-Way Data Binding → Data flows in a single direction, making apps predictable.
React Hooks → Functions like useState, useEffect allow adding logic without classes.

Why Use ReactJS?
✅ Easy to learn & use
✅ Reusable components → less code, more productivity
✅ Huge community support
✅ Used by big companies (Facebook, Instagram, Netflix, Airbnb, etc.)
✅ Works well with other frameworks & libraries



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