timeDifference.js

/**
 * Time Difference takes input in Hours Format
 * Author: imixtron
 * Accepts: String Values (HH:MM)
 * Max: 24:00, Min: 00:00
 * 
 * example timeDifference("10:37","12:35")
 */

timeDifference(from, to) {
	let _from = from.split(':');
	let _to = to.split(':');
	
	//TODO: ERROR HANDLING FOR MAX / MIN

	let _fromHours = _from[0];
	let _toHours = _to[0];

	let _fromMinutes = _from[1];
	let _toMinutes = _to[1];

	let diffHours = _toHours - _fromHours;
	let diffMinutes = _toMinutes - _fromMinutes;

	let extraHours = diffMinutes < 0 ? 1 : 0; 
	diffMinutes = diffMinutes < 0 ? diffMinutes + 60 : diffMinutes;

	return (diffHours - extraHours) + ':' + (diffMinutes);
}