In this beginner's guide, we'll take a look at what Yarn is, why you might want to use it, and how to get started with it.
If you're a web developer, you're likely familiar with Node.js, npm, and package managers in general. But have you tried using Yarn yet? Yarn is a package manager that was developed by Facebook to improve on the shortcomings of npm.
What is Yarn?
- Faster installations: Yarn uses parallel downloads and caching to speed up installation times.
- Consistent installs: Yarn uses a lockfile to ensure that the same dependencies are installed on every machine.
- Better error messages: Yarn provides more informative error messages than npm, making it easier to debug issues.
Why Use Yarn?
If npm is already installed on your system and works just fine, why bother with Yarn? Well, there are several reasons why you might want to switch to Yarn:
- Faster installations: As mentioned earlier, Yarn is faster than npm when it comes to installing packages. This can be especially useful if you're working on a large project with many dependencies.
- Consistent installs: With Yarn, you can be sure that everyone on your team is using the same versions of packages. This can help prevent issues caused by version mismatches.
- Offline installations: Yarn can install packages offline, which is useful if you're working in a location with limited internet connectivity.
- Better security: Yarn has built-in security checks to help prevent malicious packages from being installed.
Before you can start using Yarn, you'll need to install it. If you're using npm, you can install Yarn globally using the following command:
npm install -g yarn
Alternatively, you can download and install Yarn directly from the official website.
Once Yarn is installed, you can use it just like you would use npm.
Starting a new project
To install a package with Yarn, use the following command:
yarn add [package] yarn add [package]@[version] yarn add [package]@[tag]
For example, to install the lodash package, you would run:
yarn add lodash
Adding a dependency to different categories of dependencies
yarn add [package] --dev yarn add [package] --peer yarn add [package] --optional
Upgrading a dependency
yarn upgrade [package] yarn upgrade [package]@[version] yarn upgrade [package]@[tag]
yarn upgrade [package] command upgrades all dependencies to their latest versions.
Installing all the dependencies of project
Yarn will download and install the package, along with any dependencies it requires. Yarn will also create a
yarn.lock file, which specifies the exact versions of each dependency that were installed.
If you want to remove a package, use the following command:
yarn remove [package]