1function getTimeAgo(timestamp) {
2  const seconds = Math.floor((Date.now() - timestamp) / 1000);
3  const minutes = Math.floor(seconds / 60);
4  const hours = Math.floor(minutes / 60);
5  const days = Math.floor(hours / 24);
6  const months = Math.floor(days / 30);
7  const years = Math.floor(months / 12);
8
9  const formatPlural = (num, unit) => 
10    `${num} ${unit}${num === 1 ? '' : 's'} ago`;
11
12  if (years > 0) return formatPlural(years, 'year');
13  if (months > 0) return formatPlural(months, 'month');
14  if (days > 0) return formatPlural(days, 'day');
15  if (hours > 0) return formatPlural(hours, 'hour');
16  if (minutes > 0) return formatPlural(minutes, 'minute');
17  return 'Just now';
18}
19
20// Usage
21const PostTimestamp = ({ timestamp }) => {
22  const [timeAgo, setTimeAgo] = useState(getTimeAgo(timestamp));
23  
24  useEffect(() => {
25    const timer = setInterval(() => {
26      setTimeAgo(getTimeAgo(timestamp));
27    }, 60000);
28    
29    return () => clearInterval(timer);
30  }, [timestamp]);
31  
32  return <span>{timeAgo}</span>;
33};