npm-prefix

Show local prefix

$ npm prefix

$ npm prefix -g

npm prefix [options]

npm prefix prints the local or global prefix path. Shows where packages are installed.
The command displays installation directory. Useful for scripting.

-g

Global prefix.

Display help information.

Local shows closest package.json dir. Global shows npm global path.

npm prefix helps locate package installation directories for scripts and debugging.

npm(1), npm-root(1), npm-bin(1)