human-friendly-dates.ts

/**
 * Past this number of hours we'll no longer display "hours
 * ago" and instead we'll display "today"
 */
const TODAY_AT_THRESHOLD_IN_HOURS: number = 12;

function humanFriendlyDate(date: Date): string {

  // ...

  if (days === 1) {
    return __("yesterday");
  }
  
  if (hours > TODAY_AT_THRESHOLD_IN_HOURS) {
    return __("today at") + " " + 
      date.toLocaleTimeString(currentLocale,
                              { hour: "numeric", minute: "2-digit" });
  }
  
  if (hours > 0) {
    return _p("hours ago", hours);
  }
  
  // ...
}