index.js

'use strict';

function toPathCase(str) {

	if (!str) return '';

	return String(str)
		.replace(/^[^A-Za-z0-9]*|[^A-Za-z0-9]*$/g, '')
		.replace(/([a-z])([A-Z])/g, (m, a, b) => a + '_' + b.toLowerCase())
		.replace(/[^A-Za-z0-9]+|_+/g, '/')
		.toLowerCase();

}

module.exports = toPathCase;