Esm

Import Specifier

https://nodejs.org/api/esm.html#import-specifiers (opens in a new tab)

3 types

• bare (e.g. node_modules). Classic node module resolution (opens in a new tab).
• relative (e.g. ./path_to_mod). standard relative URL (opens in a new tab) resolution semantics
• absolute (e.g. file:///opt/nodejs/config.js)

URLs

• data: (e.g. import _ from 'data:application/json,"world!"')
• node: (e.g. node:fs/promise)
• file: (e.g. import './foo.mjs?query=1')

vs CJS

https://nodejs.org/api/esm.html#differences-between-es-modules-and-commonjs (opens in a new tab)