frontend-util-everything/rollup.config.js

This is frntend util package

import commonjs from '@rollup/plugin-commonjs';

export default {
  input: 'src/index.js',
  output: [
    {
      file: 'dist/index.cjs',
      format: 'cjs'
    },
    {
      file: 'dist/index.mjs',
      format: 'es'
    }
  ],
  plugins: [commonjs()]
};