SHELL

find npm version

npm --version

check npm version

npm -v

npm version

// Any of the below command will work.

npm -v
npm --v
npm -version
npm --version

check latest version of npm package

npm show {pkg} version

npm get version

npm view <package> version

check latest version of npm package

 command syntext
 npm view your-packageName version
 or 
 npm list your-packageName
 or get all installed package
 npm list
 
 
 or find latest version
 npm show your-packageName version

 
 example
 npm view firebase version 
 Above command will return the firebase version installed in my node project

 To find any npm package version which is installed in your app you can find from package.json file 
 or you can command.

How do I check npm version?

npm view npm versions --json

find any package version list

syntax
npm view package-name versions --json

How to find the version of an installed npm package?

Open your terminal and type npm -v will return your installed npm version.