Node.js notes

Node.js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine.

npm

npm is the default package manager for the JavaScript runtime environment Node.js

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# Install package
npm install package-name

# Check outdated packages
npm outpdated

# Run arbitrary package scripts in package.json
npm run

nodemon

  • nodemon will read the package.json for the main property
  • nodemon will also search for the scripts.start property in package.json

Documentation

exports / require

module.exports is used for defining what a module exports and makes available through require()
(1) The exports variable is available within a module’s file-level scope, and is assigned the value of
module.exports before the module is evaluated.

(2) However, be aware that like any variable, if a new value is assigned to exports, it is no longer bound to module.exports

Manage Node.js versions

n nvm
Overall Node module Bash script
Supported platforms macOS, Linux, including with Windows Subsystem for Linux. n does not work in native shells on Microsoft Windows unix, macOS, and windows WSL. For Windows, nvm-windows
Installation npm install -g n curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.38.0/install.sh | bash
Installing Node.js Versions n nvm install node
# “node” is an alias for the latest version

npm install installs dependencies into the node_modules/ directory
npm run build does nothing unless you specify what “build” does in your package.json file

2021-07-21
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