https://github.com/bnb/import-modules-as-esm-from-nodejs

Code from my talk, import {modules} as esm from "nodejs"
https://github.com/bnb/import-modules-as-esm-from-nodejs

Last synced: about 1 year ago
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Code from my talk, import {modules} as esm from "nodejs"

• Host: GitHub
• URL: https://github.com/bnb/import-modules-as-esm-from-nodejs
• Owner: bnb
• License: other
• Created: 2020-06-22T17:48:38.000Z (almost 6 years ago)
• Default Branch: main
• Last Pushed: 2020-06-22T17:49:06.000Z (almost 6 years ago)
• Last Synced: 2025-03-18T05:11:15.636Z (over 1 year ago)
• Language: JavaScript
• Homepage:
• Size: 4.88 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md

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README

          
# `import {modules} as esm from "nodejs"`

Code for my talk, going over modules and ESM in Node.js.

## Contents

- [**./conditional-exports**](./conditional-exports):

  - Contains a relatively barebones example of using Node.js's [conditional exports](https://nodejs.org/api/esm.html#esm_conditional_exports) with ESM and CommonJS exports from a module (checked in to `node_modules`) and using them, respectively. Uses both implicit ESM and explicit ESM.

- [**./explicit-esm**](./explicit-esm):

  - Demonstrates explicit ESM in Node.js, using `.mjs` extensions for ESM files.

- [**./implicit-esm**](./implicit-esm):

  - Demonstrates implicit ESM in Node.js, using `"type": "module"` in the project's `package.json` and `.js` extensions for ESM files.

## Definitions

- ESM

  - ECMAScript Modules, the moudle system that's built-in to JavaScript and defined by TC39.

- Implicit ESM

  - Implicit ESM is ESM in Node.js that uses `"type": "module"` as a property in `package.json`, which Node.js uses as an indicator to passively read all `.js` files as ESM rather than CommonJS (which Node.js defaults to or can be told to )

- Explicit ESM

  - Explicit ESM is ESM in Node.js that uses `.mjs` as its file extension. Node.js will automatically parse any file with .mjs as its file extension as ESM.