Rocket.Chat/apps/meteor/client/hooks/useFormatRelativeTime.ts

import moment from 'moment';
import { useCallback } from 'react';

export const useFormatRelativeTime = (): ((timeMs: number) => string) =>
	useCallback((timeMs: number) => {
		moment.relativeTimeThreshold('s', 60);
		moment.relativeTimeThreshold('ss', 0);
		moment.relativeTimeThreshold('m', 60);
		moment.relativeTimeThreshold('h', 24);
		moment.relativeTimeThreshold('d', 31);
		moment.relativeTimeThreshold('M', 12);

		return moment.duration(timeMs).humanize();
	}, []);