Modules

• Modules
  • An Overview
  • Using, Creating, and Sharing Modules
    • One Quick Way To Initialize A Module
    • Some Notes

An Overview

Code can be "packaged up", "bundled", and considered a single "module" or a set of "modules" put together.
Node considers files to be modules.

Using, Creating, and Sharing Modules

One Quick Way To Initialize A Module

A quick way to start a module is to use npm and leverage a package.json file:

• create a directory to hold the module (something like mkdir my-module)
• cd into the empty soon-to-be module directory cd my-module
• use npm to initialize the directory as a new module with npm init

More on creating modules in a bit...

Some Notes

• the type field in a package.json file will instruct node on how to treat a module:
  • module is to use es6 (import, export, etc)
  • commonjs is to use commonjs (module.exports, require, etc): commonjs is the default way that node will treat a module, even when the "type" field is not present
• *.mjs files are always treated as es6 modules
• *.cjs files are always treated as commonjs modules