Install dependencies from package.json: npm install == yarn
Install a package and add to package.json: npm install package --save == yarn add package
Install a devDependency to package.json: npm install package --save-dev == yarn add package --dev
Remove a dependency from package.json: npm uninstall package --save == yarn remove package
Upgrade a package to its latest version: npm update --save == yarn upgrade
Install a package globally: npm install package -g == yarn global add package