JavaScript is one of the most popular and developing programming languages in the world. It is used to create dynamic and interactive websites, mobile and desktop applications, games, server and cloud solutions. To work with JavaScript, you need to install and update various libraries and dependencies that extend functionality and simplify development. There are special tools for this, called package managers.

Yarn is one of these tools. Yarn is a modern and fast package manager for JavaScript, which appeared in 2016 as an alternative to npm, the most common package manager at that time. Yarn offers a number of advantages over npm, such as:

• Faster installation and package updates
• More reliable and secure dependency management
• A simpler and more user-friendly command-line interface
• More flexible and modular architecture
• Wider compatibility with different development environments and platforms

In this article, we will tell you what Yarn is, how it works, why people use it, and what benefits it will give your business.

What is Yarn and how does it work?

Yarn is a JavaScript package manager that allows you to install, update, remove, and manage various libraries and dependencies needed to work with JavaScript projects. Yarn works using Node.js, a JavaScript runtime environment that allows you to run JavaScript code outside the browser.
Yarn uses the package file.json, which stores information about the project, such as name, version, author, license, scripts, and a list of dependencies. Dependencies are packages that are necessary for the project to work, and which may have their own dependencies. Yarn installs and updates dependencies according to the package file.json, and also creates a yarn.lock file in which it records the exact versions of installed packages. This ensures that the project will work the same way on different machines and environments.
Yarn receives packages from various sources such as the npm registry, GitHub, GitLab, Bitbucket and others. Yarn also supports working with various package formats such as CommonJS, ES Modules, UMD and others. Yarn caches installed packages locally, which allows you to speed up their re-installation and reduce network load. Yarn also supports parallel installation of packages, which also helps to improve performance.

Why do people use Yarn?

Yarn was created as a response to some of the problems and shortcomings of npm, such as:

• Slow speed of package installation and updates
• Unreliable and unpredictable dependency management
• A complex and confusing command-line interface
• Vulnerability to attacks and errors

Yarn solved these problems by offering a number of improvements and innovations such as:

• Faster package installation and update speeds due to caching, parallelism, and deduplication
• More reliable and secure dependency management by using the yarn.lock file, which guarantees the same versions of packages on different machines and environments
• A simpler and more user-friendly command line interface due to the use of semantic and intuitive commands such as yarn add, yarn remove, yarn upgrade and others
• More flexible and modular architecture due to support for various sources and package formats, as well as the ability to create and use custom plugins and extensions

Thanks to these advantages, Yarn has quickly gained popularity and trust among developers and companies that use JavaScript in their projects. Facebook, Google, Airbnb, Netflix, Spotify, Twitter, GitHub, Microsoft and others are among the well-known Yarn users.

What benefits will Yarn bring to your business?

Using Yarn in your business can bring you a number of advantages, such as:

1. Increase productivity and efficiency of development by reducing the time and resources required to install and update packages
2. Improve product quality and reliability by ensuring stability and compatibility of dependencies across machines and environments
3. Reducing risks and costs by increasing security and protection against attacks and errors related to packages
4. Expanding capabilities and flexibility by supporting various package sources and formats, as well as the ability to create and use custom plugins and extensions

Conclusion