How to install Yarn on CentOS 8

Yarn is a JavaScript package manager, which is compatible with npm and can help you automatically handle installation, upgrade, configuration, and removal of npm packages.

It was created to solve a series of problems with npm, such as increasing the processing speed of package installation and reducing network connection errors through parallel operations.

This guide will guide you through the installation of Yarn on CentOS 8. We will talk about how to use Yarn to create a new project, and add and remove dependencies.

1. Install Yarn on CentOS 8

Perform the following steps as root or another sudo user on CentOS 8 to install Yarn:

If Node.js is not installed on your system, install the Node.js package first, enter:

sudo dnf install @nodejs

At the time of writing this article, the Node.js version in the CentOS8 software source is v10.x.

Enable Yarn software source and import source GPG key:

curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
sudo rpm --import https://dl.yarnpkg.com/rpm/pubkey.gpg

The official Yarn software source has been maintained and the latest version is available.

Once the software source is enabled, install Yarn:

sudo dnf install yarn

Verify the installation and print the Yarn version number:

yarn --version

As of this writing, the latest version of Yarn is 1.21.1:

1.21.1

Second, use Yarn

Now that you have installed Yarn on your CentOS system, we will explore the most commonly used Yarn commands.

2.1 Create a new project###

To create a new Yarn project, use the yarn init command and add the project name. For example, to create a project named my_project, you can enter:

yarn init my_project

This script will ask you a few questions. You can answer, or press Enter to use the default value:

yarn init v1.21.1
question name(alex): Linuxize
question version(1.0.0):0.0.1
question description: Testing Yarn
question entry point(index.js):
question repository url:
question author: Linuxize
question license(MIT):
question private:
success Saved package.json
Done in20.18s.

All the commands just create a basic package.json file, which contains the information you provide. This file can be modified at any time.

You can also add Yarn in an existing code directory. To do this, switch to the directory and execute:

yarn init my_project

2.2 Add dependency###

To add a package as a dependency to your project, use the yarn add command to add the package name:

yarn add [package_name]

This command will install this package and any packages it depends on, and update the project's package.json and yarn.lock files.

By default, if only the package name is provided, Yarn will install the latest version. To install a package of a specified version or label, use the following syntax:

yarn add [package_name]@[version_or_tag]

2.3 Upgrade dependencies###

To upgrade the package, run the yarn upgrade command and add the package name:

yarn upgrade [package_name]

The above command updates all dependencies of the project to the latest version based on the content of the package.json file.

You can specify the package version or label:

yarn upgrade [package_name]@[version_or_tag]

2.4 Remove dependencies###

To remove a package from the project dependencies, run the yarn remove command and add the package name:

yarn remove [package_name]

This command also updates the package.json and yarn.lock files of the project.

2.5 Install all project dependencies###

To install all dependent packages according to the package.json file in an existing project, run:

yarn

yarn install

Three, summary##

We have shown you how to install yarn on a CentOS 8 machine. For more information about yarn, browse Yarn Documentation Page.