clipboard.js/webpack.config.js

const pkg = require("./package.json");
const path = require("path");
const webpack = require("webpack");
const UglifyJSPlugin = require("uglifyjs-webpack-plugin");

const production = process.env.NODE_ENV === "production" || false;

const banner = `clipboard.js v${pkg.version}
https://clipboardjs.com/

Licensed MIT © Zeno Rocha`;

module.exports = {
  entry: "./src/clipboard.js",
  mode: "production",
  output: {
    filename: production ? "clipboard.min.js" : "clipboard.js",
    path: path.resolve(__dirname, "dist"),
    library: "ClipboardJS",
    globalObject: "this",
    libraryExport: "default",
    libraryTarget: "umd",
  },
  module: {
    rules: [{ test: /\.js$/, exclude: /node_modules/, loader: "babel-loader" }],
  },
  optimization: {
    minimize: production,
    minimizer: [
      new UglifyJSPlugin({
        parallel: require("os").cpus().length,
        uglifyOptions: {
          ie8: false,
          keep_fnames: false,
          output: {
            beautify: false,
            comments: (node, { value, type }) =>
              type == "comment2" && value.startsWith("!"),
          },
        },
      }),
    ],
  },
  plugins: [new webpack.BannerPlugin({ banner })],
};