Module build failed: ReferenceError: [BABEL] /app/src/index.js: Unknown option: /app/node_modules/react/react.js.Children

My project fails with the error message in title on heroku, but it works locally.

This is my webpack.config.js:

module.exports = {   entry: [     './src/index.js'   ],   output: {     path: __dirname,     publicPath: '/',     filename: 'bundle.js'   },   module: {     loaders: [{       test: /\.js$/,       exclude: /node_modules/,       loader: 'babel-loader',       query: {         presets: ['react', 'es2015', 'stage-0']       }     }]   },   resolve: {     extensions: ['.jsx', '.js']   },   devServer: {     historyApiFallback: true,     contentBase: './'   } }; 

And this is package.json:

{   "main": "index.js",   "scripts": {     "start": "node ./node_modules/webpack-dev-server/bin/webpack-dev-server.js",     "test": "mocha --compilers js:babel-core/register --require ./test/test_helper.js --recursive ./test",     "test:watch": "npm run test -- --watch"   },   "author": "",   "license": "ISC",   "devDependencies": {     "babel-core": "^6.26.0",     "babel-loader": "^7.1.2",     "babel-preset-es2015": "^6.1.18",     "babel-preset-react": "^6.24.1",     "babel-preset-stage-1": "^6.24.1",     "chai": "^3.5.0",     "chai-jquery": "^2.0.0",     "jquery": "^2.2.1",     "jsdom": "^8.1.0",     "mocha": "^2.4.5",     "react-addons-test-utils": "^0.14.7"   },   "dependencies": {     "axios": "^0.17.1",     "lodash": "^3.10.1",     "react": "^0.14.3",     "react-dom": "^0.14.3",     "react-redux": "4.3.0",     "react-router": "^2.0.1",     "react-router-dom": "^4.0.0",     "redux": "^3.0.4",     "redux-form": "^6.6.3",     "redux-promise": "^0.5.3",     "validator": "^9.1.2",     "webpack": "^3.8.1",     "webpack-dev-server": "^2.9.4"   } } 

I digged around a bit, trying to find an answer, but there was no case such as working on one machine, and not on another machine.

Update 1

Here is index.js:

import React from 'react'; import ReactDOM from 'react-dom'; import { Provider } from 'react-redux'; import { createStore, applyMiddleware } from 'redux'; import { BrowserRouter, Route, Switch } from 'react-router-dom'; import promise from 'redux-promise';  import reducers from './reducers';  import LoginForm from './components/login_form';  const createStoreWithMiddleware = applyMiddleware(promise)(createStore);  ReactDOM.render(   <Provider store={createStoreWithMiddleware(reducers)}>       <BrowserRouter>         <div>           <Route path="/" component={LoginForm} />         </div>       </BrowserRouter>   </Provider>   , document.querySelector('.container')); 

** Update 2 ** I tried changing the jsx to js for the test property in webpack loader config object, it didn't help. I removed stage-1 and it's still failing.

1 Answers

Answers 1

This problem got fixed:

1. Deleted module.query and resolve from the webpack config file.
2. Moved dependencies from devDependencies to dependencies (heroku is a production environment, and therefore it doesn't download devDependencies, which doesn't make sense to me !)

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