INTRODUCTION TO REACT.JS

BASIC INTRODUCTION TO REACT.JS


React.js is a popular JavaScript library used to build user interfaces, especially for web applications. It was developed by Facebook and is widely used to create fast, interactive, and dynamic web pages. Instead of updating the entire web page, React updates only the parts of the screen that change, which makes applications feel quicker and smoother.


React works by breaking the user interface into small, reusable pieces called components. Each component controls its own structure and behavior, making the code easier to understand and manage. React uses a syntax called JSX, which looks like HTML but is written inside JavaScript, helping developers design and control the interface in one place.

React.js is widely adopted because it is flexible, easy to learn, and supported by a large community. It can be used to build simple websites as well as large, complex applications. With strong tool support and compatibility with modern web technologies, React has become a key choice for front-end development.


Developer's perspective:

For a coder, React.js makes writing front-end code simpler and more organized. It allows developers to write UI code using JSX, which looks similar to HTML but works inside JavaScript. Code can be broken into small components, making it easy to read, test, and reuse. React also handles screen updates efficiently, so developers do not have to worry about manually changing the web page.


Designer’s perspective

From a designer’s point of view, React.js helps in creating clean and interactive user interfaces. The screen is divided into small reusable parts called components, such as buttons, menus, and cards. This makes it easy to keep the same look and feel across the whole application. React also updates the screen smoothly, so users get a fast and pleasant experience.


Architect’s perspective

From an architect’s perspective, React.js is useful for building large and scalable applications. Its component-based structure helps teams work on different parts of the application independently. Data flows in a clear and predictable way, which reduces errors and makes maintenance easier. React also works well with many other tools and frameworks, allowing architects to design flexible systems that can grow over time.

React.js PPTX

Comments

Post a Comment

Popular posts from this blog

Experiment 1: Node.js

  Introduction to Node.js Node.js is a runtime environment that allows us to run JavaScript outside the browser , mainly on  the server.  With Node.js, developers can use the same language—JavaScript—for both the front end and back end, which makes development simpler and quicker. Node.js is designed to handle many users at the same time without slowing down. It uses a non-blocking and event-driven model, meaning it does not wait for one task to finish before starting another. Instead, it responds to events as they happen. This makes Node.js perfect for applications that require quick responses and continuous communication. Applications of Node.js Real-time chat applications Video streaming platforms Online gaming servers REST APIs and backend services Single-page applications (SPAs) IoT (Internet of Things) applications Collaborative tools like shared editors or dashboards Architecture of Node.js Node.js follows a single-threaded, event-driven archi...
Read more

Experiment 10: ReactJS – Render HTML, JSX, Components – function & Class

  Write a program to render HTML to a web page. Create a React Application Open Command Prompt / Terminal and run: npx create-react-app myapp cd myapp npm start Browser opens automatically at: http://localhost:3000 React is successfully installed! myapp  ├── node_modules  ├── public  │    └── index.html  ├── src  │    ├── App.js  │    ├── index.js  │    └── App.css  └── package.json index.html <!DOCTYPE html> <html> <head>   <title>ReactJS – Render HTML</title>   <!-- React CDN -->   <script src="https://unpkg.com/react@18/umd/react.development.js"></script>   <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js"></script>   <!-- Babel -->   <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script> </head> <body>   <h2>ReactJS Experimen...
Read more

Experiment 6: ExpressJS – Routing, HTTP Methods, Middleware

  6 Experiment 6: ExpressJS – Routing, HTTP Methods, Middleware Write a program to define a route, Handling Routes, Route Parameters, Query Parameters and URL building.  Below is a simple Express.js program that demonstrates: Defining routes Handling routes Route parameters Query parameters URL building 1. Install Express open command prompt mkdir abc cd abc npm init -y npm install express 2: Create app.js   ( Simple program to start with) notepad app.js                       const express = require('express'); const app = express(); app.get('/', (req, res) => {     res.send('Express routing working!'); }); app.listen(3000, () => {     console.log('Server running on http://localhost:3000'); }); save and close. 3: Run Server node app.js Open browser: type link or url :            http://localhost:3000   to see output ROUTING AND QUER...
Read more