mapp-board/webpack.config.js

var path = require("path");

var mode = process.env.NODE_ENV || "development";

module.exports = [
  // CJS (Node.JS, React, etc...)
  {
    entry: "./src/index.js",
    mode: mode,
    output: {
      path: path.resolve(__dirname, "dist"),
      filename: "mapp-board-cjs.js",
      library: "",
      libraryTarget: "commonjs",
    },
    watch: (mode === "development"),
    externals: {
      fabric: 'fabric',
    },
  },

  // UMD (Browser)
  {
    entry: "./src/index.js",
    mode: mode,
    output: {
      path: path.resolve(__dirname, "dist"),
      filename: "mapp-board-umd.js",
      library: "mappBoard",
      libraryTarget: "umd",
    },
    watch: (mode === "development"),
  },
];