generate a unique ID

uniqueID.js

uniqueID = (length=6, n=true, lc=true, uc=true)  => { // 62^6 = 50 Billion
	let chars = '';
	if (n) chars += '1234567890';
	if (lc) chars += 'abcdefghijklmnopqrstuvwxyz';
	if (uc) chars += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
	let ID = '';
	for (let i = 0; i < length; i++) 
		ID += chars[Math.floor((Math.random() * chars.length))];
	return ID;
}