1var ID = function () {
2  // Math.random should be unique because of its seeding algorithm.
3  // Convert it to base 36 (numbers + letters), and grab the first 9 characters
4  // after the decimal.
5  return '_' + Math.random().toString(36).substr(2, 9);
6};

1Math.random().toString(36).slice(2);

1let ID = (length = 6) => {
2	// new Date() will return current time
3  	// getTime() method returns the number of milliseconds* since the Unix Epoch.
4	// -length to get last items on string
5	return new Date().getTime().toString().slice(-length);
6}