rollup.config.mjs

import terser from "@rollup/plugin-terser";
import typescriptPlugin from "@rollup/plugin-typescript"
import tsPaths from "rollup-plugin-tsconfig-paths";

/**
 * Creates an output options object for Rollup.js.
 * @param {import('rollup').OutputOptions} options
 * @returns {import('rollup').OutputOptions}
 */
function createOutputOptions(options) {
  return {
    name: 'guebbitJavascriptLibrary',
    exports: 'named',
    sourcemap: true,
	globals: {
		lodash: '_',
	},
    ...options,
  };
}

/**
 * @type {import('rollup').RollupOptions}
 */
const options = {
  input: './src/index.ts',
  output: [
    createOutputOptions({
      file: './dist/index.js',
      format: 'commonjs',
    }),
    createOutputOptions({
      file: './dist/index.cjs',
      format: 'commonjs',
    }),
    createOutputOptions({
      file: './dist/index.mjs',
      format: 'esm',
    }),
    createOutputOptions({
      file: './dist/index.esm.js',
      format: 'esm',
    }),
    createOutputOptions({
      file: './dist/index.umd.js',
      format: 'umd',
    }),
    createOutputOptions({
      file: './dist/index.umd.min.js',
      format: 'umd',
      plugins: [terser()],
    }),
  ],
  plugins: [
    typescriptPlugin(),
    tsPaths(),
  ],
  external: [
	'lodash',
  ]
};

export default options;