frontend/gallery/webpack.config.js

const path = require('path');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

const isProd = process.env.NODE_ENV === 'production';
const chunkFilename = isProd ?
  'chunk.[chunkhash].js' : '[name].chunk.js';
const buildPath = path.resolve(__dirname, 'dist');
const publicPath = isProd ? './' : 'http://localhost:8080/';

module.exports = {
  mode: isProd ? 'production' : 'development',
  // Disabled in prod while we make Home Assistant able to serve the right files.
  // Was source-map
  devtool: isProd ? 'none' : 'inline-source-map',
  entry: './src/entrypoint.js',
  module: {
    rules: [
      {
        test: /\.js$/,
        use: {
          loader: 'babel-loader',
          options: {
            plugins: [
              // Only support the syntax, Webpack will handle it.
              'syntax-dynamic-import',
              [
                'transform-react-jsx',
                {
                  pragma: 'h'
                }
              ],

            ],
          },
        },
      },
      {
        test: /\.(html)$/,
        use: {
          loader: 'html-loader',
          options: {
            exportAsEs6Default: true,
          }
        }
      },
    ]
  },
  plugins: [
    new CopyWebpackPlugin([
      'public',
      { from: '../node_modules/leaflet/dist/leaflet.css', to: `static/images/leaflet/` },
      { from: '../node_modules/@polymer/font-roboto-local/fonts', to: 'static/fonts' },
      { from: '../node_modules/leaflet/dist/images', to: `static/images/leaflet/` },
    ]),
    isProd && new UglifyJsPlugin({
      extractComments: true,
      sourceMap: true,
      uglifyOptions: {
        // Disabling because it broke output
        mangle: false,
      }
    }),
  ].filter(Boolean),
  output: {
    filename: '[name].js',
    chunkFilename: chunkFilename,
    path: buildPath,
    publicPath,
  },
  devServer: {
    contentBase: './public',
  }
};