rollup.config.js

import babel from '@rollup/plugin-babel';
import postcss from "rollup-plugin-postcss";
import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import { terser } from 'rollup-plugin-terser';
import filesize from 'rollup-plugin-filesize';
import pkg from './package.json';

export default {
  input:'src/Editor.js',
  output: [
    { file: pkg.main, format: 'cjs', exports: 'default' },
    { file: pkg.module, format: 'esm', exports: 'default' }
  ],
  plugins: [
    babel({
      babelHelpers: 'bundled',
      exclude: 'node_modules/**',
      presets: ['@babel/preset-env','@babel/preset-react']
    }),
    postcss({
      extensions: [".css"],
      minimize: true
    }),
    resolve(),
    commonjs(),
    terser(),
    filesize()
  ],
  external: Object.keys(pkg.peerDependencies)
};