Function formatRelativeTime

Source

export const formatRelativeTime = (timestamp: string | null): string => {
  if (!timestamp) return "Never";

  const date = new Date(timestamp);
  if (Number.isNaN(date.getTime())) {
    return "Unknown";
  }

  const diffMs = Date.now() - date.getTime();
  const minute = 60_000;
  const hour = 60 * minute;
  const day = 24 * hour;

  if (diffMs < minute) return "Just now";
  if (diffMs < hour) {
    const minutes = Math.round(diffMs / minute);
    return `${minutes} minute${minutes === 1 ? "" : "s"} ago`;
  }
  if (diffMs < day) {
    const hours = Math.round(diffMs / hour);
    return `${hours} hour${hours === 1 ? "" : "s"} ago`;
  }
  if (diffMs < 7 * day) {
    const days = Math.round(diffMs / day);
    return `${days} day${days === 1 ? "" : "s"} ago`;
  }

  return new Intl.DateTimeFormat(undefined, {
    dateStyle: "medium",
    timeStyle: "short",
  }).format(date);
};
Copy