How to Set up a React JS Development Environment? | Devstringx

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React JS Development Environment

How to Set up a React JS Development Environment? | Devstringx

In this write-up, we will discuss React JS. Most importantly, how to set up a React JS Development Environment? So let’s begin.

What Is React JS?

React js is usually called React. It is a javascript library used for creating a hierarchy of UI components, that is, rendering UI components. It provides front-end and server-side support.

Setting up React JS Development Environment

To run any react js application, we must have Nodejs installed on our PC. So we have to proceed through the step mentioned below:-

  • NodeJS and NPM

NodeJS is the platform needed for the development of ReactJS. You may visit the official download link of NodeJS to download and install the latest version of NodeJS on your PC.

After successfully installing NodeJS on your PC, we start installing ReactJS upon it using npm. You can set up the ReactJS environment in two ways:

  • By creating react app using the boilerplate command
  • By using Web Pack and babel

1) Creating React App Using Boilerplate Command

Step 1: First, we will install the boilerplate globally. Then we run the below command in the command prompt to install ReactJS Boilerplate.

npm, install -g create-react-app After successfully installing the react boilerplate, the next thing is to create our react app.

Step 2: Run the below command to create a new project

Exp create-react-app my-app

This command will create the app named my-app.

Step 3: You can run the project by typing the command

cd my-app

Npm start

It will give you the output in the terminal.

Step 4: Now, we will create the react app using the Boilerplate that we have installed. This command will create an app

Create-react-app MyApp

This statement will create a new directory named MyApp in your device with lots of files to run a React app successfully.

The main files on which we will be working within the introductory course are index.html and index.js. This index.html file has a div element with the id “root”, inside which everything will be rendered. All our react codes will be inside the index.js file.

Now that we have successfully set up the development environment, Now we will start the development server.

Step 5: Start the development server, for that go inside your current directory “MyApp” and execute the below command.

npm start

Now on successfully running the above command, your compiler will show an output like

Local: http://local host:3000/

On your


That’s it, now the ReactJS development environment is set up and ready.

2) Using Webpack & Babel

ReactJS and JSX syntax (syntax extension to JS) is mainly used to speed up the development process and also make it easier. The JSX syntax is not understandable by the browser. So we need a transcompiler that is Babel to convert JSX into JavaScript code.

Below mentioned steps to be performed to set up the React JS Development Environment:-

Recommended to Read:- 08 Easy Steps To Create a New React Project

We need a babel-loader for JSX file types, babel-preset-react, that will make your browser update automatically when any change occurs to your code without losing the current state of the app.

Now the question is how we will install the Web Pack which would be helpful in the ReactJS Development Environment process.

To Install the web pack, use the following command given below.

reactApp>npm install babel-core babel-loader babel-preset-env babel-preset-react babel-webpack-plugin -save-dev

You can use these commands to install them separately

reactApp>npm install babel-core -save-dev

reactApp>npm install babel-loader -save-dev

reactApp>npm install babel-preset-env -save-dev

reactApp>npm install babel-preset-react -save-dev

reactApp>npm install babel-webpack-plugin -save-dev
Step 2: Create Files

To complete the installation process, you need to add these files to your project folder. These files are webpack.config.js, index.html, app.js, main.js, and .babelrc. You can create these files manually using a command prompt.

reactApp>touch index.html

reactApp>touch App.js

reactApp>touch main.js

reactApp>touch webpack.config.js

reactApp>touch .babelrc

1) Configure Web Pack

You can configure Web Pack in webpack.config.js by adding the code given below. Configure web pack specifies the entry point of your app, the created output, and the extension that will be resolved automatically. It also set the development server’s port to 8080. It specifies the loaders for processing the different file types used inside your app, and it concludes by inserting the plugins required during development.


  1. const path = require(‘path’);
  2. constHtmlWebpackPlugin = require(‘HTML-webpack-plugin’);
  3. exports = {
  4. entry: ‘./main.js’,
  5. output: {
  6. path: path.join(__dirname, ‘/bundle’),
  7. filename: ‘index_bundle.js’
  8. },
  9. devServer: {
  10. inline: true,
  11. port: 8080
  12. },
  13. module: {
  14. rules: [
  15. {
  16. test: /\.jsx?$/,
  17. exclude: /node_modules/,
  18. use: {
  19. loader: “babel-loader”,
  20. }
  21. }
  22. ]
  23. },
  24. plugins:[
  25. newHtmlWebpackPlugin({
  26. template: ‘./index.HTML
  27. })
  28. ]
  29. }

Open the package.json file and delete the “test” echo &&” exit 1 inside the script”, then add the start and build the command instead. It is because we will not perform any testing in the app.

  1. {
  2. “name”: “reactApp”,
  3. “version”: “1.0.0”,
  4. “description”: “”,
  5. “main”: “index.js”,
  6. “scripts”: {
  7. “start”: “webpack-dev-server -mode development -open -hot”,
  8. “build”: “webpack -mode production”
  9. },
  10. “keywords”: [],
  11. “author”: “”,
  12. “license”: “ISC”,
  13. “dependencies”: {
  14. “react”: “¹⁶.8.6”,
  15. “react-dom”: “¹⁶.8.6”,
  16. “webpack-cli”: “³.3.1”,
  17. “webpack-dev-server”: “³.3.1”
  18. },
  19. “devDependencies”: {
  20. “@babel/core”: “⁷.4.3”,
  21. “@babel/preset-env”: “⁷.4.3”,
  22. “@babel/preset-react”: “⁷.0.0”,
  23. “babel-core”: “⁶.26.3”,
  24. “babel-loader”: “⁸.0.5”,
  25. “babel-preset-env”: “¹.7.0”,
  26. “babel-preset-react”: “⁶.24.1”,
  27. “html-webpack-plugin”: “³.2.0”,
  28. “webpack”: “⁴.30.0”
  29. }
  30. }

Good to Read:- New In React 18: A Guide to Its New Features and Updates


2) HTML WebPack for the template for index.html

Using the HtmlWeb-pack plugin module, we can use a custom template to create index.html. This allows us to add a viewport tag to our software to promote mobile-sensitive scaling. It also adds the index bundle.js script, our packaged app file, and sets the div id = “app” as the root attribute for your app.

  1. <!DOCTYPE html>
  2. <html lang = “en”>
  3. <head>
  4. <meta charset = “UTF-8”>
  5. <title>React App</title>
  6. </head>
  7. <body>
  8. <div id = “app”></div>
  9. <script src = ‘index_bundle.js’></script>
  10. </body>
  11. </html>

3) App.jsx

  1. import React, { Component } from ‘react’;
  2. class App extendsComponent{
  3. render(){
  4. return(
  5. <div>
  6. <h1>Hello World</h1>
  7. </div>
  8. );
  9. }
  10. }
  11. export default App;

Now, import this component and give it to your root App element to see it in the browser.

4) Main.js
import React from ‘react’;

import ReactDOM from ‘react-dom;

import App from ‘./App.js’;

ReactDOM.render(<App />, document.getElementById(‘app’));
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5) Create a .babelrc file

Create a file with the name .babelrc and copy the following code.


“@babel/preset-env”, “@babel/preset-react”]

After the installation process gets completed and the app gets set up, you can start the server by running the following command.

  1. reactApp>npm start

It will show the port number we need to open in the browser.

Step 4: Generate the Bundle

Generate the application kit now. The bundling method is to monitor import files and merge them into one file, a “bundle.” You can then load a whole app on a website. This kit will be included. The construct command has to be executed with the command prompt shown below to create this.

Recommended to Read:- Easiest Way to hire A React Developer

reactApp>npm run build

This command will generate the bundle in your current folder. I.e. index.html, index_bundle.js.

Contact Devstringx to Hire Dedicated ReactJs Developers. We have India’s best certified and experienced engineers team and they have depth knowledge and great experience in this field. We design eye-catching and creative mobile and web application UI/UX to fulfill the unique needs of our clients.

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