toHours15

toHours15 is a JavaScript function designed to convert a given number of minutes into a string representation of hours and minutes, specifically formatted to always display 15-minute increments. This function is useful for scenarios where time needs to be displayed or processed in discrete 15-minute blocks, such as scheduling or time tracking applications.

The function takes a single argument, typically representing a total number of minutes. It then calculates the number of full hours by dividing the total minutes by 60 and taking the integer part. The remaining minutes are then calculated using the modulo operator. A key aspect of toHours15 is its rounding mechanism. If the remaining minutes are greater than or equal to 7.5, the minutes are rounded up to the next 15-minute increment (15, 30, 45, or 60). If the remaining minutes are less than 7.5, they are rounded down to the nearest 15-minute increment (0, 15, 30, or 45).

The final output is a string in the format "HH:MM", where HH represents the calculated hours and MM represents the rounded minutes, always ensuring the minutes are a multiple of 15. For example, 97 minutes would be processed as 1 hour and 37 minutes. Since 37 is greater than or equal to 7.5 and less than 22.5, it would be rounded to 30 minutes, resulting in the output "01:30". Similarly, 110 minutes would result in "01:45". This consistent 15-minute interval formatting makes it suitable for applications requiring structured time intervals.