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REACT.JS : Multi main Error

i'm new with React.JS (on Windows 10 ) , i'm fulfilling a first tuto , within, i'm used to set up a basic workspace for my React.app. But after setting up webpack and babel packages globally and locally in my respository , and making a first hello word app , the first build didn't work.

my pre-installation:

npm install -g babel
npm install -g babel-cli
npm install webpack --save
npm install webpack-dev-server --save
npm install react --save
npm install react-dom --save
npm install babel-core
npm install babel-loader
npm install babel-preset-react
npm install babel-preset-es2015

consequently my package.json contains :

{
  "name": "reactapp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
  "start": "webpack-dev-server --hot"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babel-cli": "^6.0.0",
    "babel-core": "^6.17.0",
    "babel-loader": "^6.2.5",
    "babel-preset-es2015": "^6.16.0",
    "babel-preset-react": "^6.16.0",
    "react": "^15.3.2",
    "react-dom": "^15.3.2",
    "webpack": "^1.13.2",
    "webpack-dev-server": "^1.16.2"
  }
}

my repository contains 4 other files : index.html , App.jsx , main.js , webpack.config.js

index.html:

<!DOCTYPE html>
<html lang = "en">

   <head>
      <meta charset = "UTF-8">
      <title>React App</title>
   </head>

   <body>
      <div id = "app"></div>
      <script src = "index.js"></script>
   </body>

</html>

App.jsx :

import React from 'react';

class App extends React.Component {
   render() {
      return (
         <div>
            Hello World!!!
         </div>
      );
   }
}

export default App;

main.js:

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

ReactDOM.render(<App />, document.getElementById('app'));

webpack.config.js

var config = {
   entry: './main.js',

   output: {
      path:'./',
      filename: 'index.js',
   },

   devServer: {
      inline: true,
      port: 8123
   },

   module: {
      loaders: [
         {
            test: /\.jsx?$/,
            exclude: /node_modules/,
            loader: 'babel',

            query: {
               presets: ['es2015', 'react']
            }
         }
      ]
   }
}

module.exports = config;

so whenever i'm launching "npm start " i'm getting a failed build (the capture -attached-)

enter image description here

and similarly , on localhost:8123 , i'm getting a same error like below: enter image description here

Any suggestion to resolve that ??

like image 334
firasKoubaa Avatar asked Jan 26 '26 10:01

firasKoubaa


1 Answers

i ve simply resolved it by deleting the node_modules folder , and retaping npm install

like image 76
firasKoubaa Avatar answered Jan 28 '26 00:01

firasKoubaa



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