Description: Yarn global is a command that allows you to install Node.js packages globally on the system, making them available for use in any project without the need to install them locally in each one. This command is part of Yarn, a package manager that has become popular for its speed and efficiency in managing dependencies. By installing a package globally, it is placed in a directory accessible from any terminal, allowing tools and scripts to be executed easily. Yarn global is commonly used for command-line tools, libraries, and utilities that are required across multiple projects, ensuring that developers have access to the latest and most stable versions of these tools. Additionally, Yarn offers features such as dependency resolution, parallel installation, and version management, making it a preferred choice over other package managers like npm. Global installation is especially useful in development environments where a quick and efficient setup of frequently used tools, such as project generators, linters, and testing frameworks, is needed.
History: Yarn was developed by Facebook in 2016 in response to the limitations of npm, the default package manager for Node.js. Since its launch, Yarn has evolved to include features that enhance the developer experience, such as faster package installation and more efficient dependency management. The ‘yarn global’ command was introduced to facilitate the installation of tools used across multiple projects, allowing developers to access these tools without complications.
Uses: The ‘yarn global’ command is primarily used to install command-line tools that are needed across multiple projects, such as application generators, linters, and testing frameworks. This allows developers to maintain a cleaner and more organized working environment, avoiding the need to install the same tools in each individual project.
Examples: A practical example of using ‘yarn global’ is the installation of Create React App, a tool that allows for quick creation of React applications. By running ‘yarn global add create-react-app’, developers can create new React applications anywhere on their system without needing to install the tool in each project. Another example is the installation of ESLint, a linter for JavaScript, which can be installed globally to be used uniformly across different projects.
