rollup.config.js

import babel from "rollup-plugin-babel";
import commonjs from "@rollup/plugin-commonjs";
import external from "rollup-plugin-peer-deps-external";
import resolve from "@rollup/plugin-node-resolve";
import { terser } from "rollup-plugin-terser";

import pkg from "./package.json";

export default {
  input: "src/index.js",
  output: [
    {
      file: pkg.main,
      format: "cjs",
      sourcemap: true,
    },
    {
      file: pkg.module,
      format: "es",
      sourcemap: true,
    },
  ],
  plugins: [
    external({
      includeDependencies: true,
    }),
    resolve({
      main: true,
      browser: true,
    }),
    babel({
      plugins: [
        "@babel/plugin-proposal-object-rest-spread",
        "@babel/plugin-proposal-optional-chaining",
        "@babel/plugin-syntax-dynamic-import",
      ],
      exclude: "node_modules/**",
      runtimeHelpers: true,
    }),
    commonjs(),
    terser(),
  ],
};