Webpack Dev Server (webpack-dev-server) Hot Module Replacement (HMR) Not Working

Question

I have gone through many answers on StackOverflow & on GitHub issues as well but, I am still stuck in Hot Module Replacement in Webpack. I am using npm start to

Answer 1

Your webpack config is off. Take a look at react-transform-boilerplate for a correct setup.

webpack.config.js

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

module.exports = {
  // or devtool: 'eval' to debug issues with compiled output:
  devtool: 'cheap-module-eval-source-map',
  entry: [
    // necessary for hot reloading with IE:
    'eventsource-polyfill',
    // listen to code updates emitted by hot middleware:
    'webpack-hot-middleware/client',
    // your code:
    './src/index'
  ],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/dist/'
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin()
  ],
  module: {
    loaders: [{
      test: /\.js$/,
      loaders: ['babel'],
      include: path.join(__dirname, 'src')
    }]
  }
};

.babelrc

{
  "presets": ["react", "es2015"],
  "env": {
    "development": {
      "presets": ["react-hmre"]
    }
  }
}