Find the version of an installed npm package

npm list for local packages or npm list -g for globally installed packages.

The result should look like (package@version):

├─┬ cli-color@0.1.6 
│ └── es5-ext@0.7.1 
├── coffee-script@1.3.3 
├── less@1.3.0 
├─┬ sentry@0.1.2 
│ ├── file@0.2.1 
│ └── underscore@1.3.3 
└── uglify-js@1.2.6 

Edit: As @juanpaco pointed out it is now possible to directly display the version of one package if you know the name of the package.

For example: npm list grunt will result in:

projectName@projectVersion /path/to/project/folder
└── grunt@0.4.1

Another quick way of finding out what packages are installed locally and without their dependencies is to use:

npm list --depth=0

Which gives you something like

├── bower@0.8.6
├── grunt@0.4.1
├── grunt-bower-requirejs@0.4.3
├── grunt-contrib-clean@0.4.1
├── grunt-contrib-coffee@0.7.0
├── grunt-contrib-copy@0.4.1
├── grunt-contrib-imagemin@0.1.4
├── grunt-contrib-jshint@0.1.1
├── grunt-contrib-livereload@0.1.2
├── grunt-contrib-requirejs@0.4.1
├── grunt-regarde@0.1.1
└── grunt-svgmin@0.1.0

Obviously, the same can be done globally with npm list -g --depth=0.

This method is clearer in case you have installed a lot of packages.

npm view <package> version - returns the latest available version on the package.

npm list --depth=0 - returns versions of all installed modules without dependencies.

npm list - returns versions of all modules and dependencies.

And lastly to get node version: node -v

npm info YOUR_PACKAGE version

e.g.

npm info grunt version
0.4.5

Just a by the way, sometimes some bleeding edge versions of Node won't work in certain environments. That's when Node Version Manager - nvm comes in handy. It enables one not only to check the current version but also install several versions and toggle versions according to your needs.

It saved my day a couple of times already!

If you agree to install jq, you can use the JSON output of npm list.

npm -j ls <package-name> | jq -r .version

or, if you want to be verbose

npm --json list <package-name> | jq --raw-output '.version'

For instance:

$ npm -j ls ghost | jq -r .version
0.4.2

Also, the JSON format is slightly different for global packages, so you'll need to change the query.

For instance:

$ npm -j -g ls | jq -r .dependencies.ghost.version
0.4.2

use npm {{pkg name}} -v this is the easy way to extract package version