npm root

npm root -g
/Users/YOUR_USER/brew/lib/node_modules

Related

• npm list
• npm config get prefix

See also

• npm, npx, npm [ init | audit | install | link | config | token | start | publish | run start | update | rebuild | ci | run build ] .env/, list | ls | --version , package.json, $HOME/.npmrc, npm help, NPM Registry, npm ERR!