Date.diff

Return the duration of time between the Date object and $referenceDate.

$referenceDate can be one of the following:

• Date object
• Date string (e.g. “2021-10-17”, “now”, “3 days ago”). See Date Strings.
• Unix timestamp (integer)

$referenceDate is the point of reference, to determine if this date object comes before (negative) or after (positive).

$now = Date.now()

$futureDate = $now.add('2 hours')
$pastDate = $now.add('-1 hour')

$futureDate.diff()
//= 7200 (secs)

$pastDate.diff($futureDate, 'hours')
//= 3

$futureDate.diff($pastDate, 'hours')
//= -3