rollup.config.js

import summary from 'rollup-plugin-summary';
import terser from '@rollup/plugin-terser';
import resolve from '@rollup/plugin-node-resolve';
import replace from '@rollup/plugin-replace';
import dotenv from 'rollup-plugin-dotenv';

export default {
  input: 'index.js',
  output: {
    file: 'index.bundled.js',
    format: 'esm',
  },
  onwarn(warning) {
    if (warning.code !== 'THIS_IS_UNDEFINED') {
      console.error(`(!) ${warning.message}`);
    }
  },
  plugins: [
    replace({preventAssignment: false, 'Reflect.decorate': 'undefined'}),
    resolve(),
    /**
     * This minification setup serves the static site generation.
     * For bundling and minification, check the README.md file.
    */
   terser({
     ecma: 2021,
     module: true,
     warnings: true,
     mangle: {
       properties: {
         regex: /^__/,
        },
      },
    }),
    summary(),
    dotenv(),
  ],
};