ESM: Default, Mixed, and Async

Default exports and imports

One widely used feature of CommonJS is the ability to export a single unnamed entity through the assignment of module.exports. We saw that this is very convenient as it encourages module developers to follow the single-responsibility principle and expose only one clear interface. With ESM, we can do something similar through what’s called a default export. A default export makes use of the export default keywords, and it looks like this: