Looking for how to Install React JS? You are at right place, we will discuss manual and automatic installation of React js in this article.
React JS is a famous JavaScript flexible front end library which is introduced by Facebook. It is totally component-oriented and helps to build the modular UI.
How to install the React JS :
There are 2 types of the installation process.
- Automatic installation
- Manual Installation
1. Automatic Installation of React.JS
The automatic process should be used when we want to create a new application of React.
Instructions:
npm install -g create-react-appcreate-react-app my-appcd my-appnpm start
(After that your application will run on the browser)
2. Manual Installation of ReactJS:
The manual installation process should be used when we want to use react in our existing application.
Requirements:
- Webpack – It is a bundler, with the help of this we can write modular code and it creates a bundle of all the modules, it increases the performance of our application.
- Babel – It is a compiler, it helps to run modern JavaScript (Like ES6) code in the older browser also.
After installing webpack and Babel we have to install “react” and “react-dom” module. - npm install react react-dom –save After these installations, we can make components and render them also.
Folder structure:
This folder structure will help you to know all the required files used in our application. As you see node_modules folder is here, it contains all the modules which are required in our application like react, react-dom, webpack, Babel etc…
Most required files:
⦁ index.html: This file will look like this.
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<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>React App</title> </head> <body> <div id="my-app"></div> </body> <script src="/bundle.js"></script> </html> |
⦁ .babelrc file: This file includes Babel configuration.
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{ "presets": ["react", "es2015", "env"] } |
⦁ Webpack.config file: this is Webpack configuration file.
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module.exports = { entry: [ './src/index.js' ], output: { path: __dirname, publicPath: '/', filename: 'bundle.js' }, module: { loaders: [{ exclude: /node_modules/, loader: 'babel', query: { presets: ['react', 'es2015', 'env'] } }] }, resolve: { alias: { 'react/lib/ReactDom': 'react-dom/lib/ReactDom' }, extensions: ['', '.js', '.jsx'] }, devServer: { historyApiFallback: true, contentBase: './' } }; |
⦁ src/index.js file: This is the main file because we have made this file as the entry of this application.
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import React from 'react'; import ReactDOM from 'react-dom'; ReactDOM.render('This is demo app.', document.getElementById('my-app ') ); |
So, your application is ready, for run this application use “npm start”.
With the help of this blog, you can install react in your application. I have introduced 2 methods of installation. So, you can create new react application or you can add react application in your existing application.
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Ask your quires about the installation problem in the comment section.
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