rollup.config.js

import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import peerDepsExternal from 'rollup-plugin-peer-deps-external';
import typescript from 'rollup-plugin-typescript2';
import json from '@rollup/plugin-json';
import postcss from 'rollup-plugin-postcss';
import { readFile } from 'fs/promises';
import { fileURLToPath } from 'url';
import { dirname } from 'path';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const pkg = JSON.parse(await readFile(new URL('./package.json', import.meta.url)));

export default {
  input: 'src/index.tsx',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
      sourcemap: true,
      exports: 'named'
    },
    {
      file: pkg.module,
      format: 'esm',
      sourcemap: true,
      exports: 'named'
    }
  ],
  plugins: [
    peerDepsExternal(),
    resolve({
      extensions: ['.js', '.jsx', '.ts', '.tsx']
    }),
    commonjs({
      include: 'node_modules/**'
    }),
    postcss({
      inject: true,
      modules: false,
      minimize: true,
      sourceMap: true
    }),
    json(),
    typescript({
      useTsconfigDeclarationDir: true,
      tsconfigOverride: {
        compilerOptions: {
          declaration: true,
          declarationDir: './dist',
          module: 'esnext'
        }
      }
    })
  ],
  external: ['react', 'react-dom']
};