//urls.js file

const urls = {
    'allImages': '/images/all/',
    'catImage': '/images/<animal>/<id>/',
};

module.exports = urls;

import Library from 'js-reverse/js-reverse/reverse-library';
import urls from 'urls';

const library = new Library('big-cat-database.com');
library.register(urls);

library.get('allImages');
// big-cat-database.com/images/all/

library.get('catImage', {animal: 'cat', id: 9000});
// big-cat-database.com/images/cat/9000/

library.get('catImage', {animal: 'cat', id: 9000}, {paginateBy: 20, order: 'from_cute_to_ugly'});
// http://big-cat-database.com/images/cat/9000/?paginateBy=20&order=from_cute_to_ugly