rollup.config.js

import { nodeResolve } from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs'
import terser from '@rollup/plugin-terser';
import postcss from 'rollup-plugin-postcss';
import peerDepsExternal from 'rollup-plugin-peer-deps-external'
import { babel } from '@rollup/plugin-babel';
// import { uglify } from "rollup-plugin-uglify";
// import uglify from "@lopatnov/rollup-plugin-uglify";
// const packageJson = require('./package.json')

export default [
    {
        input: 'index.js', // Corrected the entry file to index.js
        output: [
            {
                file: 'dist/index.js',
                format: 'cjs',
                sourcemap: false,
            },
            {
                file: "dist/index.es.js",
                format: "es",
                exports: "named"
            }
        ],
        external: [
            'react',
            'react-dom'
        ],
        plugins: [
            peerDepsExternal(),
            nodeResolve({
                extensions: ['.js', '.jsx']
            }),
            commonjs(),
            terser(),
            postcss({
                plugins: [],
                minimize: true,
                extract: 'style.css'
            }),
            babel({

                // presets: ["@babel/preset-env", "@babel/preset-react"],
                // extensions: ['.js', '.jsx']
                configFile: './.babelrc',
                babelHelpers: "bundled",
                exclude: 'node_modules/**',
            }),
            // uglify()
        ],
    }
]