yarn install all dependencies code example

Example 1: add dev dependency yarn

yarn add -D package
//or
yarn add --dev package

Example 2: update all dependencies npm

npm update  //update all local packages

Example 3: linux install yarn

curl -o- -L https://yarnpkg.com/install.sh | bash

Example 4: yarn add install all packages in package,json

yarn install

Example 5: install dev dependency yarn

yarn add nameOfPackage --dev