npm install save dev code example

Example 1: npm install package as developer dependency

npm install --save-dev package
# example:
npm install --save-dev nodemon

Example 2: npm install in dev mode

npm install packageName --save-dev

Example 3: how to install dependencies from package.json

npm install // installs dependencies listed in package.json

Example 4: npm install and add to dependancies

npm i packageName -save