Yarn is a package manager for your code. It allows you to use and share code with other developers from around the world. Yarn does this quickly, securely, and reliably so you don’t ever have to worry.
Yarn allows you to use other developers’ solutions to different problems, making it easier for you to develop your software. If you have problems, you can report issues or contribute back, and when the problem is fixed, you can use Yarn to keep it all up to date.
Code is shared through something called a package (sometimes referred to as a module). A package contains all the code being shared as well as a
package.json file which describes the package.
You can install Yarn through the Homebrew package manager. This will also install Node.js if it is not already installed.
If you chose manual installation, the following steps will add Yarn to path variable and run it from anywhere.
Note: your profile may be in your
- Add this to your profile:
export PATH="$PATH:/opt/yarn-[version]/bin"(the path may vary depending on where you extracted Yarn to)
- In the terminal, log in and log out for the changes to take effect
To have access to Yarn’s executables globally, you will need to set up the
PATH environment variable in your terminal. To do this, add export PATH="$PATH:
yarn global bin" to your profile.
Yarn will warn you if a new version is available. To upgrade Yarn, you can do so with Homebrew.
brew upgrade yarn
Test that Yarn is installed by running:
Below are some of the most common commands you’ll need.
Starting a new project
Adding a dependency
yarn add [package] yarn add [package]@[version] yarn add [package]@[tag]
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]
Removing a dependency
yarn remove [package]
Installing all the dependencies of project