rollup.config.js

import resolve from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import typescript from '@rollup/plugin-typescript';
import dts from 'rollup-plugin-dts';
import {terser} from 'rollup-plugin-terser';
import peerDepsExternal from 'rollup-plugin-peer-deps-external';
import postcss from 'rollup-plugin-postcss';

const packageJson = require('./package.json');

export default [
  // this object defines how the actual Javascript code of our library is generated.
  {
    input: 'src/index.ts', // The entrypoint for our library (input) which exports all of our components.
    output: [
      {
        file: packageJson.main,
        format: 'cjs',
        sourcemap: true,
      },
      {
        file: packageJson.module,
        format: 'esm',
        sourcemap: true,
      },
    ],
    plugins: [
      peerDepsExternal(),
      resolve(),
      commonjs(),
      typescript({tsconfig: './tsconfig.json'}),
      terser(),
      postcss(),
    ],
    external: [
      'react',
      'react-dom',
      // 'styled-components'
    ],
  },
  // this object defines how our libraries types are distributed and uses the dts plugin to do so.
  {
    input: 'dist/esm/types/index.d.ts',
    output: [{file: 'dist/index.d.ts', format: 'esm'}],
    plugins: [dts()],
    external: [/\.scss$/],
  },
];