out locally before putting it on NPM, use
First, from the directory of the package you are creating run:
$ npm link
This will symlink the package to the global node modules directory.
Then, from the base project directory that you want to try importing and using the package from, run:
$ npm link name-of-package
This will create an additional symlink from the global node modules
directory to the
node_modules of this target project.
You’ll now have access to the project, try an
import to get what you need
and try it out.
man npm-link for more details.