rollup.config.js

import ts from 'typescript'
import dts from 'rollup-plugin-dts'

import resolve from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import typescript from '@rollup/plugin-typescript'

export default [
    {
        input: './index.ts',
        plugins: [
            resolve(), 
            commonjs(), 
            typescript({
                typescript: ts,
                tsconfig: './tsconfig.json'
            })
        ],
        output: [
            {
                exports: 'named',
                dir: 'package/esm',
                format: 'esm',
                preserveModules: true
            },
            {
                dir: 'package/cjs',
                format: 'cjs',
                preserveModules: true
            }
        ],
        external: ['readline', 'fs', 'stream'],
        watch: {
            chokidar: {},
            exclude: [
                'node_modules/**', 
                'dist/**'
            ]
        }
    },
    {
        input: 'index.ts',
        plugins: [
            resolve(), 
            commonjs(), 
            typescript({
                typescript: ts,
                tsconfig: './tsconfig.json'
            }),
            dts()
        ],
        external: ['readline', 'fs', 'stream'],
        output: {
            file: 'package/index.d.ts',
            format: 'es'
        }
    }
]