Yarn

Install Yarn

brew install yarn

Switch yarn to specific version / latest version (yarn 1.x)

yarn policies set-version <version>
yarn policies set-version

Switch yarn to specific version / latest version (yarn 2.x)

yarn set version <version>
yarn set version latest

Information

Show yarn version and help

yarn -v
yarn help

Show information for a package

yarn info <package>

Show why a package was installed

yarn why <package>

List

List installed packages (local / global)

yarn list
yarn global list

List only top level global packages

yarn list --depth=0
yarn global list --depth=0

List packages that match pattern

yarn list --pattern <string>

Init

Initialize package config in current folder (-y or --yes for default setup)

yarn init
yarn init --yes

Generate new yarn lock file from installed packages

yarn import

Install

Install all configured package.json dependencies (dev and production)

yarn install

Install new dev (-D), peer (-P), optional (-O) package

yarn add <package>
yarn add <package>@<version>
yarn add <package> --dev

Global packages

yarn global add <package>

Uninstall

Uninstall package (local, dev, global)

yarn remove <package>
yarn remove <package> --dev
yarn global remove <package>

Upgrade

Upgrade packages or specific package (local, global) for current major

yarn upgrade
yarn upgrade <package>
yarn global upgrade <package>

Upgrade packages or specific package to latest version regardless of package.json version ranges

yarn upgrade --latest
yarn upgrade -L
yarn upgrade -L <package>

Show outdated packages where new version exists

yarn outdated
yarn outdated <package>

Scripts

Run scripts from package.json

yarn run <script-name>

Check

Check configured dependencies match lock file

yarn check

Global Packages and Cache

Show location of global packages folder

yarn global bin

Show direction of global cache

yarn cache dir

List all or matching packages in global cache

yarn cache list
yarn cache list --pattern <string>

Clear the global cache

yarn cache clean

Configuration

Display the current configuration

yarn config list

Set configuration values

yarn config set <key> <value>

Get configuration value

yarn config get <key>

Delete configuration value

yarn config delete <key>