What Is Yarn Explained:

- Yarn is a JavaScript Package Manager created by Facebook Inc. (now Meta Inc.).

- Similar functionality with NPM (Node Package Manager) and installs packages from NPM registry

- Recommended Resources:
- Yarn Crash Course: https://www.youtube.com/watch?v=g9_6KmiBISk

i- Install Yarn For MacOs
official Installer: https://classic.yarnpkg.com/en/docs/install
Yarn Workspace: https://classic.yarnpkg.com/en/docs/workspaces

ii- Install Yarn For Windows

Follow instruction below or here https://github.com/coreybutler/nvm-windows/wiki/Common-Issues#how-do-i-use-yarn-with-nvm-windows

- Open Powershell/Commandline

- ensure NodeJs Vs 14.18.1 is installed because it needed for this course

- "nvm list" to see list of installed Nodejs and active one

- Installation:

- Put in "npm install -g yarn" and ENTER

- After Installation - test if successfully install with following command
"yarn" and ENTER

if successful, it will tell you installed info like bwloe:
yarn install v1.22.17
[1/4] Resolving packages...
success Already up-to-date.
Done in 0.21s.

iii- IMPORTANT:
When you install a package on any of the NodeJs version at global level
it may or may not migrate to another when you switch the NodeJs version with NVM

FOR EXAMPLE:

- Install Yarn as Global Package on Version 14.18.1 using
"npm install -g yarn" and ENTER

- Check the installation with
"yarn" and ENTER
you would get response like: version installed

- Then switch the NodeJS version from 14.18.1 to 14.0.0 using
"nvm use 14.0.0" and ENTER
you will likely receive error message instead showing you don't have yarn installed
which means you have to install it too on 14.0.0 because it is not been carried over
from version 14.18.1 to version 14.0.0 after we switched it with NVM.

Challenge:

yarn.ps1 cannot be loaded because running scripts is disabled on this system

solution: paste this line of code on your shell and press enter 'Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted'

and respond A to accept all