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Node.js

About​

Node.js is an open-source, cross-platform, back-end, JavaScript runtime environment that executes JavaScript code outside a web browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser. Consequently, Node.js represents a "JavaScript everywhere" paradigm, unifying web-application development around a single programming language, rather than different languages for server- and client-side scripts. (Wikipedia, 2020)

Getting started​

NVM​

nvm is a version manager for node.js, designed to be installed per-user, and invoked per-shell. nvm works on any POSIX-compliant shell (sh, dash, ksh, zsh, bash), in particular on these platforms: unix, macOS, and windows WSL.

Installation​

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash

Install latest node.js version​

nvm install node # "node" is an alias for the latest version

Install a specific version of node​

nvm install 6.14.4 # or 10.10.0, 8.9.1, etc

The first version installed becomes the default. New shells will start with the default version of node (e.g., nvm alias default).

List all available versions​

nvm ls-remote

User a specified version​

nvm use node # or 6.14.4, 10.10.0, 8.9.1, etc

Run node​

nvm run node --version

Run node with specific version​

nvm exec 4.2 node --version

Get path where specified version was installed​

nvm which 5.0

YARN​

Yarn is a package manager that doubles down as project manager. Whether you work on one-shot projects or large monorepos, as a hobbyist or an enterprise user, we've got you covered.

Installation​

npm install -g yarn

Accessing the list of commands​

yarn help

Starting a new project​

yarn init

Installing all the dependencies​

yarn
# OR
yarn install

Adding a dependency​

yarn add [package]
yarn add [package]@[version]
yarn add [package]@[tag]

Adding a dependency to different categories of dependencies​

yarn add [package] --dev  # dev dependencies
yarn add [package] --peer # peer dependencies

Upgrading a dependency​

yarn up [package]
yarn up [package]@[version]
yarn up [package]@[tag]

Upgrading a dependency​

yarn remove [package]

Upgrading Yarn itself​

yarn set version latest
yarn set version from sources