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yarn

Initialization​

yarn init                # Interactive package.json setup
yarn init -y             # Default setup

Installing Packages​

yarn add <package>               # Add to dependencies
yarn add <package>@<version>     # Add specific version
yarn add <package> --dev         # Add to devDependencies
yarn add <package> --peer        # Add to peerDependencies
yarn add <package> --optional    # Add to optionalDependencies

yarn install                     # Install all dependencies
yarn install --force             # Force re-download
yarn install --production        # Only production dependencies

yarn global add <package>        # Install package globally

Updating & Removing Packages​

yarn upgrade <package>           # Upgrade to latest version
yarn upgrade <package>@<version> # Upgrade to specific version
yarn upgrade-interactive         # Interactive upgrade of dependencies

yarn remove <package>            # Remove a package
yarn global remove <package>     # Remove global package

Listing & Info​

yarn list                        # List installed packages
yarn list --depth=0              # Top-level only
yarn info <package>              # Package details
yarn why <package>               # Why a package is installed
yarn outdated                    # Show outdated packages

Scripts​

"scripts": {
  "start": "node app.js",
  "test": "jest",
  "build": "webpack"
}
yarn run <script>                # Run any script
yarn start                       # Shortcut for "start"
yarn test                        # Shortcut for "test"

Versioning​

yarn version                     # Interactive version update
yarn version --patch             # Patch update (1.0.0 → 1.0.1)
yarn version --minor             # Minor update (1.0.0 → 1.1.0)
yarn version --major             # Major update (1.0.0 → 2.0.0)

Workspaces​

yarn workspaces list             # List all workspaces
yarn workspace <name> <cmd>      # Run command in workspace

Cleaning & Diagnostics​

yarn cache clean                 # Clear Yarn cache
yarn check                       # Verify dependency versions
yarn doctor                      # Check for common issues
yarn audit                       # Security check
yarn audit --groups dependencies # Audit only dependencies

Lockfile​

  • yarn.lock: Automatically maintained. Commit this file for consistent installs.

Miscellaneous​

yarn help                        # Show Yarn help
yarn config list                 # Show Yarn config
yarn config set <key> <value>    # Set config value
yarn global bin                  # Show global binary path
yarn bin                         # Show binary path for local project

Publishing Packages​

yarn publish                     # Publish package to registry

Yarn vs npm​

  • yarn add = npm install
  • yarn remove = npm uninstall
  • yarn upgrade = npm update
  • yarn run = npm run
  • yarn global add = npm install -g
  • Yarn is faster and offers better dependency resolution.

Tip: Use Yarn 2+ for advanced features like Plug'n'Play, zero-install, etc.