webpack.config.js

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

let proEnv;
try {
  proEnv = require('./env.json');
} catch (error) {
  console.error('========================================================================================');
  console.error('Cannot find env.json, please make a copy of "env.example.json", and name it "env.json"');
  console.error('========================================================================================');
  throw new Error('Cannot find env.json, please make a copy of "env.example.json", and name it "env.json"');
}

const config = {
  mode: process.env.NODE_ENV,
  context: `${__dirname}/src`,
  entry: {
    background: './background.js',
    'options/options': './options/options.js',
    'overlay/overlay': './overlay/overlay.js',
  },
  output: {
    path: `${__dirname}/dist`,
    filename: '[name].js',
  },
  resolve: {
    extensions: ['.js', '.vue'],
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader',
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        test: /\.scss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.sass$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader?indentedSyntax'],
      },
      {
        test: /\.(png|jpg|jpeg|gif|svg|ico)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: '/images/',
          emitFile: false,
        },
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: '/fonts/',
          emitFile: false,
        },
      },
    ],
  },
  plugins: [
    new webpack.DefinePlugin({
      global: 'window',
    }),
    new VueLoaderPlugin(),
    new MiniCssExtractPlugin({
      filename: '[name].css',
    }),
    new CopyPlugin([
      { from: 'icons', to: 'icons' },
      { from: 'options/options.html', to: 'options/options.html', transform: transformHtml },
      {
        from: 'manifest.json',
        to: 'manifest.json',
        transform: content => {
          const jsonContent = JSON.parse(content);
          jsonContent.version = version;
          if (process.env.RELEASE !== 'true' && proEnv.manifest_key) {
            jsonContent.key = proEnv.manifest_key;
          }
          return JSON.stringify(jsonContent, null, 2);
        },
      },
    ]),
  ],
  performance: {
    maxEntrypointSize: 10240000,
    maxAssetSize: 10240000,
  },
  // fix js code isn't UTF-8 encoded.
  optimization: {
    // Uncomment below line to no minimize our code.
    // minimize: false,
    minimizer: [
      new TerserPlugin({
        terserOptions: {
          output: { ascii_only: true },
        },
      }),
    ],
  },
};

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;