How to tell if npm package was installed globally or locally

I am installing grunt, node, npm, bower, and grunt-cli on windows7.

The instructions say i should run the install commands with -g flag for global.

How can I check if I used the -g flag when i installed. It will take a lot of time to uninstall them and reinstall.

Use the list command with the -g flag to see all packages that are installed globally:

npm list -g

To check if a specific package is installed globally, you can provide the name of package (grunt in this case) as seen below:

npm list -g grunt

Or you can use grep to filter on package names:

npm list -g | grep grunt

Source: https://docs.npmjs.com/cli/ls

npm list --depth 1 --global packagename > /dev/null 2>&1

You can then check the exit status to see if it's installed or not. Thanks Adam Monsen.

To check if a specific package is installed globally execute:

npm list -g [package-name]

Let's take "grunt" as an example. If it is installed globally, you should see something like this

C:\data\tryout\test1>npm list -g grunt
C:\Users\xxxxxxx\AppData\Roaming\npm
└── grunt@0.4.5

If it is not installed globally, you should see something like this

C:\data\tryout\test1>npm list -g grunt
C:\Users\xxxxxxx\AppData\Roaming\npm
└── (empty)

To check if a specific package is installed locally you can execute the same commands as above but without the -g parameter.

source: [How to check if npm package was installed globally or locally][1].

[1]: http://resolvethis.com/how-to-check-if-npm-package-was-installed-globally-or-locally/ "HOW TO CHECK IF NPM PACKAGE WAS INSTALLED GLOBALLY OR LOCALLY"

You can list all global packages with the command:

npm ls -g

Or check for a specific package with:

npm ls -g [package-name] 

For example: npm ls -g @angular/cli

In Windows we use the following command to find out whether the package is installed or not. Please refer image for details.

npm list -g | find "create"

From your package with sindresorhus/is-installed-globally

https://github.com/sindresorhus/is-installed-globally

Usage:

const isInstalledGlobally = require('is-installed-globally');

// With `npm install your-package`
console.log(isInstalledGlobally);
//=> false

// With `npm install --global your-package`
console.log(isInstalledGlobally);
//=> true

I found this useful when I had to distribute prebuilt files with my package: https://stackoverflow.com/questions/31642477/how-to-publish-a-npm-package-with-distribution-files/59407033#59407033 With this package, I can check if the installation is local or global, and then use relative paths for local installations, as shown here.