Overview

Yarn is a fast, reliable, and secure dependency management tool for JavaScript. Developed by Facebook, Yarn was created to address some of the shortcomings of NPM, such as speed and consistency in package installations.

Yarn uses a lockfile to ensure that dependencies are installed consistently across different environments.

Installation

There are multiple ways to install Yarn. In this guide, we will show the three easiest methods for installing Yarn. You can find information on other methods here.

npm install -g yarn

  yarn -v

Usage

Initializing a Project

yarn init

This command initializes a new project and creates a package.json file.

Installing a Package

yarn add <package_name>

This command installs a package locally in your project and updates the package.json and yarn.lock files.

yarn add lodash

Installing a Package Globally

yarn global add <package_name>

This command installs a package globally on your system, making it available from any directory.

yarn global add create-react-app

Updating a Package

yarn upgrade <package_name>

This command updates a package to the latest version. If no package name is specified, it updates all project dependencies.

yarn upgrade lodash

Uninstalling a Package

yarn remove <package_name>

This command removes a package from your project and updates the package.json and yarn.lock files accordingly.

yarn remove lodash