Webpack config for transpiling orange-i18n or banana-i18n to ES5

webpack.config.js

// Webpack configuration to transpile ES module library to MW environment
// Run:
// $ npm i -D webpack webpack-cli @babel/core @babel/preset-env babel-loader
// $ npx webpack
// Find output in dist/banana-i18n.js

const path = require('path')
const TerserPlugin = require('terser-webpack-plugin')

module.exports = {
  mode: 'production',
  entry: './src/index.js',
  target: ['web', 'es5'],
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env']
        }
      }
    ]
  },
  optimization: {
    minimizer: [
      new TerserPlugin({
        // Without ascii_only=true, MW minifier somehow mangles a regex in the output
        // causing it to be invalid JavaScript
        terserOptions: { output: { ascii_only: true } }
      })
    ]
  },
  output: {
    library: 'Banana',
    libraryExport: 'default',
    libraryTarget: 'umd',
    globalObject: 'this',
    filename: 'banana-i18n.js',
    path: path.resolve(__dirname, 'dist')
  }
}