Yarn

https://yarnpkg.com/

Yarn is a package manager for JavaScript. It was developed by Facebook, Google, Exponent, and Tilde to address some shortcomings of the npm (Node Package Manager) in terms of performance, determinism, and security. Yarn is compatible with the npm registry and can be used as a drop-in replacement for npm. Here are some key features and commands related to Yarn:

Key Features:

1. Fast and Deterministic:

   • Yarn is designed to be faster and more deterministic in terms of dependency resolution and package installation compared to npm.

2. Offline Mode:

   • Yarn has an offline mode that allows you to install packages without an internet connection, using the dependencies stored in a local cache.

3. Lock File:

   • Yarn generates a yarn.lock file that locks down the versions of installed dependencies, ensuring consistency across different environments.

4. Parallel Installs:

   • Yarn performs parallel package installations, making the installation process more efficient.

5. Workspaces:

   • Yarn supports workspaces, allowing you to manage multiple packages within a single top-level, root package.

6. Scripts:

   • Yarn allows you to define and run scripts using the yarn run command.

Common Yarn Commands:

1. Install Packages:

   • yarn install: Installs dependencies listed in the package.json file.
   • yarn add <package>: Adds a package to the project.
   • yarn add <package> --dev: Adds a package as a development dependency.

2. Remove Packages:

   • yarn remove <package>: Removes a package from the project.

3. Upgrade Packages:

   • yarn upgrade: Upgrades all dependencies to their latest versions based on the version ranges specified in package.json.
   • yarn upgrade <package>: Upgrades a specific package to the latest version.

4. Run Scripts:

   • yarn run <script>: Executes a script defined in the scripts section of package.json.

5. Check Outdated Packages:

   • yarn outdated: Shows a list of outdated packages.

6. Global Installation:

   • yarn global add <package>: Installs a package globally.

7. Create a New Project:

   • yarn create <starter-kit>: Creates a new project based on a starter kit.

8. Check for Security Issues:

   • yarn audit: Checks for known security vulnerabilities in dependencies.

Resources:

• Yarn Documentation: The official documentation provides comprehensive information on installing, configuring, and using Yarn.

• Yarn GitHub Repository: Access the source code and contribute to the development of Yarn on GitHub.

Yarn is widely used in the JavaScript and Node.js ecosystem for managing dependencies and packages. It offers a number of features to enhance the reliability and performance of package installations and is commonly chosen for its speed and determinism.

Links

Getting started