npm-find-dupes
searches for duplicate packages in node_modules
TLDR
Find duplicate packages
$ npm find-dupes
SYNOPSIS
npm find-dupes
DESCRIPTION
npm find-dupes searches for duplicate packages in node_modules. Reports packages installed multiple times at different versions. Use npm dedupe to resolve duplicates.
INSTALL
sudo pacman -S npm
sudo apk add npm
brew install npm
SEE ALSO
npm(1), npm-dedupe(1)