With the introduction of react JS  , the way we build our UI component has changed. things that we build our components in react so you must be aware that the learning curve of react is very small but there are some tools that we need to understand for going into react , so one of those tools are webpack and Babel. So in this article we will do React JS Setup using Npm Babel and Webpack.

We will not cover the full understanding of webpack in Babel ,  but we will see how we can use this in our react applications .

 So guys we will be using Windows in our demonstration but you can use Linux as well so the prerequisite of starting this blog post is that you need to have node JS installed .

Let’s go to this URL and download NodeJS. Please download the latest version of Node JS.

So once you have downloaded node JS with you have to go to command  prompt and verify by typing 

$ node -v 

So once you got the output as I have shown above that means your node JS is installed .

Step By Step Guide to Setup React Project

Now navigate to any of the folder where you want to create your project and create a folder named as hello-world and initialize with npm .

What is Npm ?

npm is a package manager for node based applications , similar to what is known as maven for java based applications.

Create a Project Structure

• We Will type npm init to initialize npm .
• Will be getting one prompt so just accept the default for all the prompts whatever you get and continue.
• npm init will create a package.json file in your working directory .
• We Create One folder named as hello-world and then run npm init as shown below.

How to Configure Babel

React Js Contains ES6 based code which most browsers doesn’t support at this point of time .Hence we need some tool to convert our ES6 code to plain vanilla javascript , and the tool is Babel . Let’s install all babel related dependencies one by one . Type in following commands one by one .

frugalis$ npm install -g babel
frugalis$ npm install -g babel-cli
frugalis$ npm install --save babel-core babel-loader babel-preset-react babel-preset-es2015

Now lets go ahead and install react specific dependencies .

frugalis$ npm install --save react
frugalis$ npm install --save react-dom

How to Setup WebPack for React Project

What is Webpack ?

Webpack is the bundler we will use, which will bundle all our javascript files.Its is basically a module bundler which bundles all our Javascript modules and assets into one or more bundles.

let’s install webpack using NPM.

npm install --save webpack

Install  webpack dev server , we use it for live reloading . It helps us to provide fast in memory access to assets bundled by webpack.

npm install --save  webpack-dev-server 

Now our webpack requires some config files let’s create a file named webpack.config.js

webpack.config.js:-

config = {
   entry: './main.js',
	
   output: {
      path:'/target',
      filename: 'index.js',
   },
	
   devServer: {
      inline: true,
      port: 8090
   },
	
   module: {
      loaders: [
         {
            test: /\.jsx?$/,
            exclude: /node_modules/,
            loader: 'babel-loader',
				
            query: {
               presets: ['es2015', 'react']
            }
         }
      ]
   }
}

module.exports = config;

Let’s understand what we have done here in webpack config file shown above .

You Can see here , entry and output are mandatory to be provided in this config file .Our UI will run on port 8090 as configured in webpack.config.js  Lets go ahead and create a file known as main.js under hello-world directory.

>npm install -g babel
>npm install -g babel-cli
>npm install --save babel-core babel-loader babel-preset-react babel-preset-es2015

npm install --save react
npm install --save react-dom

npm install --save webpack

npm install --save  webpack-dev-server 

config = {
   entry: './main.js',
	
   output: {
      path:'/target',
      filename: 'index.js',
   },
	
   devServer: {
      inline: true,
      port: 8090
   },
	
   module: {
      loaders: [
         {
            test: /\.jsx?$/,
            exclude: /node_modules/,
            loader: 'babel-loader',
				
            query: {
               presets: ['es2015', 'react']
            }
         }
      ]
   }
}

module.exports = config;

import React from 'react';
import ReactDOM from 'react-dom';
import Hello from './Hello.jsx';

ReactDOM.render(<Hello />, document.getElementById('hello'));

import React from 'react';

class Hello extends React.Component {

   render() {
     const element=  <div>
            <h1>Hello World from ReactJS</h1>
            <hr/>
            Yo Yo ! Welcome!
         </div>;
                return (element);
   }
}

export default Hello;

<!DOCTYPE html>
<html lang = "en">
   <head>
      <meta charset = "UTF-8">
      <title>React App</title>
   </head>
   <body>
      <div id = "hello">
      </div>
      <script src = "index.js"></script>
   </body>
</html>

{
  "name": "helo-world",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
   "start": "webpack-dev-server --hot"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babel-core": "^6.26.0",
    "babel-loader": "^7.1.2",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "webpack": "^3.10.0"
  }
}

Running the Application:-

Type “npm start” , you get following output . If you face any issues kindly comment.

output:- 

Download Code

“Its Always Better To Learn and Share Instead Learn and Forget” 

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