Скачать или смотреть React JS Introduction + Setup | Learn React Step-by-Step | MERN Stack Series

Welcome back to Code Simplifier!
This is the first video of our MERN Stack Series, and today we begin with ReactJS.
In this video, you will understand what ReactJS is, why it is used, and how to install React on your system using Vite.

🚀 What You Will Learn in This Video
🔹 What is ReactJS?

React is a JavaScript library used to build modern UIs

Created by Facebook (Meta)

Works on a component-based architecture

Helps create reusable UI components

Supports fast rendering using the Virtual DOM

🔹 Why Use React?

Reusable components

Faster UI updates

Works with Virtual DOM (updates only the necessary parts)

Easy state management

Huge ecosystem

Widely used in modern web development

A part of many full-stack technologies including the MERN stack

🛠️ React Installation (Using Vite)

In this video, you will see:

Prerequisites: Node.js and NPM

Visiting the official Vite website: vitejs.dev

Following the documentation

Running the setup command:

npm create vite@latest


Choosing:

Project Name

Framework → React

Variant → JavaScript

Installing dependencies

Starting the development server

Understanding basic project files:

src/App.jsx

index.html

📌 Key Concepts Explained

JSX and how React uses it

How React renders UI

Why React is called a Single Page Application (SPA)

Role of the main HTML file and components

⏱️ Video Chapters

00:00 – Introduction
00:03 – What is ReactJS?
00:44 – Why React uses Virtual DOM
01:21 – React ecosystem & role in full-stack development
01:40 – How to install React with Vite
02:03 – Creating React project in VS Code
02:44 – Installing Node modules & project setup
03:31 – Understanding App.jsx and JSX
04:00 – How React renders Single Page Applications
04:10 – Summary & next video info

📚 Next Video

In the next part, we will begin building a basic React website and explore components in detail.
Stay tuned and subscribe to follow the complete MERN Stack Series!

🔗 Useful Links

React Docs — https://react.dev

Vite Docs — https://vitejs.dev

Node.js Download — https://nodejs.org

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Channel: Code Simplifier

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