Extended Jira timestamps

gistfile1.js

// ==UserScript==
// @name         Extended Jira timestamps
// @namespace    https://wolstenhol.me
// @version      0.1
// @author       Phil Wolstenholme
// @match        https://jira.ctidigital.com/*
// @grant        none
// @downloadURL  https://gist.githubusercontent.com/philwolstenholme/bebd63911db7011a7a1b/raw/ce8bde9d87d97377789e4d123f66461eed52848b/gistfile1.js
// @updateURL    https://gist.githubusercontent.com/philwolstenholme/bebd63911db7011a7a1b/raw/ce8bde9d87d97377789e4d123f66461eed52848b/gistfile1.js
// ==/UserScript==

(function ($) {

  function alterTimestamps() {
    var now = new Date();
    $("time.livestamp").each(function( index ) {
      var timestamp = new Date($(this).attr('datetime'));
      var differenceMilliseconds = (now - timestamp );
      var differenceHours = Math.round((differenceMilliseconds % 86400000) / 3600000);
      var differenceMinutes = Math.round(((differenceMilliseconds % 86400000) % 3600000) / 60000);
      $(this).parent().attr('title', differenceHours + ' hour(s), ' + differenceMinutes + ' minute(s) ago');
    });
  }

  (function triggerAlterations() {
    alterTimestamps();
    alternationInterval = setInterval(alterTimestamps, 5000);
  })();

}(jQuery));