npm install for yarn code example

Example 1: install yarn

npm install -g yarn

Example 2: install yarn

brew install yarn

Example 3: yarn react install

There are two ways where you can initiate a REACT app.. 
1. Using npm : npm init react-app 
	 example : npm init react-app sampleApp
2. Using yarn : yarn create react-app 
	 example : yarn create react-app sampleApp

Example 4: yarn save dev

yarn add  [--dev/-D]

Example 5: install yarn

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

Example 6: yarn add --save-exact

yarn add  [--exact/-E]