• CLI

• JS API

• –format
  • iife
  • cjs
  • umd
• ES6 import
  • only implemented in modern browser
  • not finalised in Node.js

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// commonJS
const utils = require('./utils');

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// ES6
import { ajax } from './utils';

config file

rollup.config.js:

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export default {
  input: 'src/main.js',
  output: {
    file: 'bundle.js',
    format: 'cjs'
  }
};

with TypeScript:

install Plugin @rollup/plugin-typescript

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rollup --config rollup.config.ts --configPlugin typescript