react-errors/examples/simple-example/webpack.config.js

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module.exports = {
  entry: './entry.js',
  output: 'bundle.js',
  debug: true,
  devtool: 'source-map',
  module: {
    loaders: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loaders: ['babel-loader'],
      },
    ],
  },
};