Cheap and dirty date formatter

formatter.js

const date = new Date();
date.setDate(date.getDate() - 2); // Set date to 2 days ago

const now = new Date();
const diffInMilliseconds = now - date;
const seconds = Math.floor(diffInMilliseconds / 1000);

const formatter = new Intl.RelativeTimeFormat('en', { numeric: 'auto' });

const formattedDate = formatter.format(
  seconds < 60
    ? -seconds
    : seconds < 3600
    ? -Math.floor(seconds / 60)
    : seconds < 86400
    ? -Math.floor(seconds / 3600)
    : now.getDate() === date.getDate() && now.getMonth() === date.getMonth() && now.getFullYear() === date.getFullYear()
    ? -Math.floor(seconds / 86400)
    : now.getMonth() === date.getMonth() && now.getFullYear() === date.getFullYear()
    ? -Math.floor(now.getDate() - date.getDate())
    : -Math.floor(now.getMonth() - date.getMonth()),
  seconds < 60
    ? 'second'
    : seconds < 3600
    ? 'minute'
    : seconds < 86400
    ? 'hour'
    : now.getDate() === date.getDate() && now.getMonth() === date.getMonth() && now.getFullYear() === date.getFullYear()
    ? 'day'
    : now.getMonth() === date.getMonth() && now.getFullYear() === date.getFullYear()
    ? 'day'
    : 'month'
);

console.log(formattedDate);