const {env} = require('store-env')

process.env.URL = 'https://www.google.com/';
process.env.DATABASE = 'SOME_VERY_LONG_NAME';
process.env.COUNTER = 5;

const envStore = env(
		process.env, // {URL: string; DATABASE: string; name: string}
		{
			defaults: {NAME: 'FooBar', DATABASE: 'FOO'},
			validators: {DATABASE: user => user.length < 3, COUNTER: counter => counter % 5 !== 0}
		}
	);

// Available in environment and no validation defined
envStore.get('URL') // 'https://www.google.com/'

// Failed the validation function but a default `FOO` is provided
envStore.get('DATABASE') // 'FOO'

// Default `FooBar` is provided
envStore.get('NAME') // 'FooBar'

// Failed the validation
envStore.get('COUNTER') // undefined