rollup.config.js

import peerDepsExternal from "rollup-plugin-peer-deps-external";
import postcss from "rollup-plugin-postcss";
import babel from "@rollup/plugin-babel";
import resolve from "@rollup/plugin-node-resolve";
import commonjs from "@rollup/plugin-commonjs";

const external = ["react", "react-dom", "react-router-dom", "react-dom/server"];
// const external = id => id.includes('@babel/runtime')

const plugins = [
	babel({
		// Only transpile our source code
		exclude: "node_modules/**",
		// Include the helpers in the bundle, at most one copy of each
		babelHelpers: "runtime",
	}),
	peerDepsExternal(),
	resolve({
		// module: true,
		// browser: true,
		// jsnext: true,
		// preferBuiltins: false,
		extensions: [".js", ".json", ".jsx"],
		dedupe: ["react", "react-dom", "react-router-dom", "react-dom/server"],
	}),
	commonjs(),
	postcss(),
];

const rollupConfig = {
	input: `./src/index.js`,
	output: {
		file: `./lib/index.js`,
		format: "cjs",
		name: "coreui-react",
		inlineDynamicImports: true,
	},
	external,
	plugins,
};

module.exports = rollupConfig;