Node.js

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

Installation

Using Homebrew

brew install node

Manage multiple Node Version with nvm

Download and install nvm by running:

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.31.1/install.sh | bash

Then download Node and select your version by running:

source ~/.bashrc        # source your bashrc/zshrc to add nvm to PATH
command -v nvm          # check the nvm use message
nvm install node        # install most recent Node stable version
nvm ls                  # list installed Node version
nvm use node            # use stable as current version
nvm ls-remote           # list all the Node versions you can install
nvm alias default node  # set the installed stable version as the default Node

See the documentation for information.

Switch automatically the Node and NPM version

Make sure you have set the default alias for nvm - e.g.: nvm alias default 8.11.2

git clone https://github.com/dijitalmunky/nvm-auto.git ~/.oh-my-zsh/custom/plugins/nvm-auto

Add nvm-auto to your plugins in ~/.zshrc.

Add a call to the nvm_auto_switch function after NVM is initialized in your .zshrc file.

Source .zshrc in your current shell or restart your shell.

npm usage

To install a package:

npm install <package> # Install locally
npm install -g <package> # Install globally

To install a package and save it in your project's package.json file:

npm install <package> --save

To see what's installed:

npm list [-g]

To find outdated packages:

npm outdated [-g]

To upgrade all or a particular package:

npm update [-g] [<package>]

To uninstall a package:

npm uninstall [-g] <package>

npm-link

Symlink a package folder:

npm link (in package dir)
npm link [<@scope>/]<pkg>[@<version>]

alias: npm ln

Yarn

For project with a lot of dependencies, or particular dependencies, we should probably use yarn.

Homebrew

You can install Yarn through the Homebrew. This will also install Node.js if it is not already installed.

brew install yarn

If you use nvm or similar, you should exclude installing Node.js so that nvm’s version of Node.js is used.

brew install yarn --without-node

Path Setup

If you chose manual installation, the following steps will add Yarn to path variable and run it from anywhere.

Note: your profile may be in your .profile, .bash_profile, .bashrc, .zshrc, etc.

1. Add this to your profile: export PATH="$PATH:/opt/yarn-[version]/bin" (the path may vary depending on where you extracted Yarn to)

2. In the terminal, log in and log out for the changes to take effect

To have access to Yarn’s executables globally, you will need to set up the PATH environment variable in your terminal. To do this, add export PATH="$PATH:`yarn global bin`" to your profile.

Upgrade Yarn

Yarn will warn you if a new version is available. To upgrade Yarn, you can do so with Homebrew.

brew upgrade yarn

Test that Yarn is installed by running:

yarn --version

Problems? If you are unable to install Yarn with any of these installers, please search through GitHub for an existing issue or open a new one.

Search for an existing issue · Open a new issue

Usage

Now that you have Yarn installed, you can start using Yarn. Here are some of the most common commands you’ll need.

Starting a new project

yarn init

Adding a dependency

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

Adding a dependency to different categories of dependencies

Add to devDependencies, peerDependencies, and optionalDependencies respectively:

yarn add [package] --dev
yarn add [package] --peer
yarn add [package] --optional

Upgrading a dependency

yarn upgrade [package]
yarn upgrade [package]@[version]
yarn upgrade [package]@[tag]

Removing a dependency

yarn remove [package]

Installing all the dependencies of project

yarn

or

yarn install

Install globally some useful packages

yarn global add pm2 eslint

Additional Reading

How do I use Yarn? There are basic workflows for both creating and consuming Yarn packages that will help you get productive quickly.

CLI CommandsYarn is executed through a rich set of commands allowing package installation, administration, publishing, and more.