Format time to a go

TimeAge.js

const timeAgo = (dateTime) => {
  const diff = Number(new Date()) - dateTime;
  const minute = 60 * 1000;
  const hour = minute * 60;
  const day = hour * 24;
  const month = day * 30;
  const year = day * 365;
  switch (true) {
    case diff < minute:
      const seconds = Math.round(diff / 1000);
      return `${seconds} ${seconds > 1 ? 'seconds' : 'second'} ago`
      case diff < hour:
        return Math.round(diff / minute) + ' minutes ago';
      case diff < day:
        return Math.round(diff / hour) + ' hours ago';
      case diff < month:
        return Math.round(diff / day) + ' days ago';
      case diff < year:
        return Math.round(diff / month) + ' months ago';
      case diff > year:
        return Math.round(diff / year) + ' years ago';
      default:
        return "";
    }
  };
  console.log(timeAgo(new Date(2020-05-22T15:16:20.571Z).getTime()));