ES6 imports using module names without path

I would like to be able to import my modules using just name without path.

For example, say I want to use:

import ViewportChecker from 'viewport-checker';

instead of

import ViewportChecker from '../ViewportChecker';

But I want to keep the file where it is and not create a new npm module of it. Would it be possible to define it as module for exmaple in package.json?