I learned to install npm according to some tutorials before, and set up, for example:
npm config set prefix或npm config set cache
But because I don't know npm very well, I can't find the installed command when using the terminal, and I want to restore the default value.
the way is:
Delete the .npmrc file
His location can be entered in the terminal: npm config ls
Find the path of userconfig, rm -rf will do it, then your npm will be normal