webpack.config.js

const path = require('path');
const env = require('yargs').argv.env;
const pkg = require('./package.json');
const libraryName = pkg.name;

let plugins = [], outputFile, mode;

const camelCased = function (s) {
  return s.replace(/-([a-z])/g, function (g) { return g[1].toUpperCase(); });
};

if (env === 'build') {
  mode = 'production';
  outputFile = libraryName + '.min.js';
} else {
  mode = 'development';
  outputFile = libraryName + '.js';
}

const config = {
  mode,
  entry: __dirname + '/src/index.js',
  devtool: 'source-map',
  output: {
    path: __dirname + '/dist',
    filename: outputFile,
    library: camelCased(libraryName),
    libraryTarget: 'umd',
    libraryExport: 'default',
    globalObject: 'this'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        loader: 'string-replace-loader',
        options: {
          search: '##package_version##',
          replace: require('./package.json').version
        }
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /(node_modules|bower_components)/
      },
      {
        test: /\.js$/,
        loader: 'eslint-loader',
        exclude: /node_modules/
      }
    ]
  },
  resolve: {
    modules: [path.resolve('./node_modules'), path.resolve('./src')],
    extensions: ['.json', '.js']
  },
  plugins
};

module.exports = config;