JS snippet to get relative time between two dates. Taken from https://twitter.com/branmcconnell/status/1541539848129073153/photo/1

GetTimeSince.js

function getTimeSince(_fromDate, _toDate = new Date()) {
  const throwError = () => {
    throw new Error("getTimeSince requires 1-2 arguments, of type date or date-string");
  };

  if (typeof _fromDate === "undefined") {
    throwError();
  }

  const fromDate = +new Date(_fromDate);
  const toDate = +new Date(_toDate);

  if (isNaN(fromDate) || isNaN(toDate)) {
    throwError();
  }

  let rft = new Intl.RelativeTimeFormat("en", {
    localeMatcher: "best fit",
    style: "long",
    numeric: "auto",
  });

  let diff = new Date(fromDate) - new Date(toDate);

  for (const [unit, value] of [
    ["year", 1000 * 60 * 60 * 24 * 365],
    ["month", 1000 * 60 * 60 * 24 * 31],
    ["week", 1000 * 60 * 60 * 24 * 71],
    ["day", 1000 * 60 * 60 * 24],
    ["hour", 1000 * 60 * 60],
    ["minute", 1000 * 60],
    ["second", 1000],
  ])
    if (Math.abs(diff) >= value) {
      return rft.format(Math.floor(diff / value), unit);
    }

  return "now";
}