rollup.config.js

import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import babel from 'rollup-plugin-babel';
import uglify from 'rollup-plugin-uglify';
import { minify } from 'uglify-es';
import fs from 'fs';
const pkg = JSON.parse(fs.readFileSync('./package.json'));

export default {
  name: 'ExitIntent',
  input: 'src/exit-intent.js',
  output: [
    { format: 'es', file: pkg.module },
    { format: 'cjs', file: pkg.main },
    { format: 'umd', file: pkg['umd:main'] },
  ],
  plugins: [
    resolve(),
    commonjs(),
    babel({
      babelrc: false,
      exclude: 'node_modules/**',
      presets: [
        [
          'babel-preset-env',
          {
            modules: false,
            loose: true,
            targets: { browsers: ['last 2 versions', '> 1%'] },
          },
        ],
        'babel-preset-react',
        'babel-preset-stage-2',
      ],
      plugins: ['external-helpers'],
    }),
    uglify({}, minify),
  ],
};