webpack.config.js

const path = require("path");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");

module.exports = {
  mode: "production",
  target: "web",
  devtool: "inline-source-map",
  resolve: {
    alias: {
      "@": path.resolve(__dirname, "src"),
    },
  },
  entry: ["./src/index.ts"],
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "[name].js",
    libraryTarget: "umd",
    libraryExport: 'default',
    library: {
      name: "Watermark",
      type: 'var',
    },
    umdNamedDefine: true,
  },

  resolve: {
    // Add `.ts` and `.tsx` as a resolvable extension.
    extensions: [".ts", ".tsx", ".js"],
    // Add support for TypeScripts fully qualified ESM imports.
    alias: {
      ".js": [".js", ".ts"],
      ".cjs": [".cjs", ".cts"],
      ".mjs": [".mjs", ".mts"],
    },
  },
  module: {
    rules: [
      {
        test: /\.m?js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: ["@babel/preset-env"],
          },
        },
      },
      {
        test: /\.ts$/,
        use: {
          loader: "ts-loader",
          options: {
            configFile: path.resolve(__dirname, "./tsconfig.json"),
          },
        },
        exclude: /node_modules/,
      },
    ],
  },
  plugins: [new CleanWebpackPlugin()],
};