webpack.config.js

const webpack = require('webpack');
const ejs = require('ejs');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtensionReloader = require('webpack-extension-reloader');
const { VueLoaderPlugin } = require('vue-loader');
const { version } = require('./src/manifest.json');

const config = {
  mode: process.env.NODE_ENV,
  context: `${__dirname}/src`,
  entry: {
    background: './background.js',
    'popup/popup': './popup/popup.js',
    'popup/analytics': './popup/analytics.js'
  },
  output: {
    path: `${__dirname}/dist`,
    filename: '[name].js'
  },
  resolve: {
    extensions: ['.js', '.vue']
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loaders: 'vue-loader'
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader']
      },
      {
        test: /\.scss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader']
      },
      {
        test: /\.sass$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          'sass-loader?indentedSyntax'
        ]
      },
      {
        test: /\.(png|jpg|gif|svg|ico)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]?emitFile=false'
        }
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2)$/,
        loader: 'url-loader'
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      global: 'window'
    }),
    new VueLoaderPlugin(),
    new MiniCssExtractPlugin({
      filename: '[name].css'
    }),
    new CopyWebpackPlugin([
      { from: 'icons', to: 'icons', ignore: ['icon.xcf'] },
      {
        from: 'popup/popup.html',
        to: 'popup/popup.html',
        transform: transformHtml
      },
      {
        from: 'manifest.json',
        to: 'manifest.json',
        transform: content => {
          const jsonContent = JSON.parse(content);
          jsonContent.version = version;

          if (config.mode === 'development') {
            jsonContent.content_security_policy =
              "script-src 'self' 'unsafe-eval'; object-src 'self'";
          }

          return JSON.stringify(jsonContent, null, 2);
        }
      }
    ])
  ]
};

if (config.mode === 'production') {
  config.plugins = (config.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"'
      }
    })
  ]);
}

if (process.env.HMR === 'true') {
  config.plugins = (config.plugins || []).concat([
    new ExtensionReloader({
      manifest: __dirname + '/src/manifest.json'
    })
  ]);
}

function transformHtml(content) {
  return ejs.render(content.toString(), {
    ...process.env
  });
}

module.exports = config;