Webpack error: You may need an appropriate loader to handle this file type

Question

I am new to webpack and react and am trying to set up an application. From looking at previous questions I think there must be something wrong with how I am setting up babel-loader, but I'm unable to see what my mistake is. Is anyone else able to see it?

webpack.config.js:

 var webpack = require('webpack'); var path = require('path'); var BUILD_DIR = path.resolve(__dirname, 'waves/client/public'); var APP_DIR = path.resolve(__dirname, 'waves/client/app'); var config = { entry: APP_DIR + '/index.jsx', output: { path: BUILD_DIR, filename: 'bundle.js' }, module: [ { test: /\\.jsx?/, include: APP_DIR, loaders: ["babel-loader"], query: { presets: ['es2015', 'react'] } } ] }; module.exports = config;

babel.rc

 { "presets": ["es2015", "react"] }

Index.jsx

 import React from 'react'; import ReactDom from 'react-dom'; class App extends React.Component { render() { return <p>Hello React!</p>; } } ReactDom.render(<App />, document.getElementById('app'));

Answer 1

Here is the documentation for the module options object: https://webpack.github.io/docs/configuration.html#module

If you have babel-preset-2015 and babel-preset-react npm modules installed and the following webpack.config.js ( babel.rc file isn't needed with the query presets) should work:

var webpack = require('webpack');
var path = require('path');

var BUILD_DIR = path.resolve(__dirname, 'waves/client/public');
var APP_DIR = path.resolve(__dirname, 'waves/client/app');

var config = {
  entry: APP_DIR + '/index.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  module: {
    loaders: [{
      test: /\.jsx?/,
      include: APP_DIR,
      loader: "babel-loader",
      query: {
        presets: ['es2015', 'react']
      }
    }]
  }
};

module.exports = config;

Answer 2

Change you webpack file to include the babel-loader within quotes and included in an array of loaders as shown below. In modules you define an array of loaders to handle different types of files but a single loader for a particular type.

var webpack = require('webpack');
var path = require('path');

var BUILD_DIR = path.resolve(__dirname, 'waves/client/public');
var APP_DIR = path.resolve(__dirname, 'waves/client/app');

var config = {
  entry: APP_DIR + '/index.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
   module: {
    loaders: [
      {
        test: /\.js?$/,
        exclude: /(node_modules|bower_components)/,
        include: APP_DIR,
        loader: 'babel-loader',
        query: {
          presets: ['react', 'es2015'],
        }
      }
    ]
  },
};

module.exports = config;