webpack.config.js

const webpack = require('webpack')
const path = require('path')
const fileSystem = require('fs')
const env = require('./utils/env')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const WriteFilePlugin = require('write-file-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')

// load the secrets
var alias = {
  'react': 'preact-compat',
  'react-dom': 'preact-compat',
  'create-react-class': 'preact-compat/lib/create-react-class'
}

var secretsPath = path.join(__dirname, ('secrets.' + env.NODE_ENV + '.js'))

if (fileSystem.existsSync(secretsPath)) {
  alias['secrets'] = secretsPath
}

var options = {
  entry: {
    popup: path.join(__dirname, 'src', 'js', 'popup.js'),
    options: path.join(__dirname, 'src', 'js', 'options.js'),
    background: path.join(__dirname, 'src', 'js', 'background.js')
  },
  output: {
    path: path.join(__dirname, 'build'),
    filename: '[name].bundle.js'
  },
  module: {
    rules: [
      {
        // set up standard-loader as a preloader
        enforce: 'pre',
        test: /\.jsx?$/,
        loader: 'standard-loader',
        exclude: /(node_modules|bower_components)/,
        options: {
          parser: 'babel-eslint'
        }
      },
      { test: /\.css$/, loader: 'style-loader!css-loader', exclude: /node_modules/ },
      {
        test: /\.sass$/,
        exclude: /node_modules/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'sass-loader']
        })
      },
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: { loader: 'babel-loader' }
      }
    ]
  },
  resolve: {
    modules: [
      path.resolve('./src'), 'node_modules'
    ],
    alias: alias
  },
  plugins: [
    // expose and write the allowed env vars on the compiled bundle
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(env.NODE_ENV)
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'popup.html'),
      filename: 'popup.html',
      chunks: ['popup']
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'options.html'),
      filename: 'options.html',
      chunks: ['options']
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'background.html'),
      filename: 'background.html',
      chunks: ['background']
    }),
    new WriteFilePlugin(),
    new ExtractTextPlugin('[name].css')
  ]
}

if (env.NODE_ENV === 'development') {
  options.devtool = 'cheap-module-eval-source-map'
}

module.exports = options