Dojo time stamp browser plugins

GetTimeStamp.js

/**
 * Gets a time stamp out of either localStorage, or a cookie session, if those are available.
 * Use in conjunction with SetTimeStamp module.
 * @module GetTimeStamp
 * @param {string} id - string id you want to use to retrieve a time stamp from the browser
 * @returns {Date} - Date of the last time stamp
 */
define(["dojo/cookie"], function (cookie) {
  return {
    load: function (id, require, callback) {
      // localStorage test courtesy of Mathtias Bynens: https://mathiasbynens.be/notes/localstorage-pattern
      var storage, fail, uid, d, ms;
      try {
        uid = new Date;
        (storage = window.localStorage).setItem(uid, uid);
        fail = storage.getItem(uid) != uid;
        storage.removeItem(uid);
        fail && (storage = false);
      } catch (exception) {
        if (cookie.isSupported()) {
          storage = {
            getItem: function (item) { return cookie(item); }
          };
        }
      } finally {
        d = new Date(0);
        if (storage) {
          ms = storage.getItem(id);
          if (ms && !isNaN(ms)) {
            d.setUTCSeconds(parseInt(ms, 10));
          }
        } 
        callback(d);
      }
    }
  }
});

SetTimeStamp.js

/**
 * Stores a time stamp in either localStorage or a cookie session, if either of those is available. 
 * Use in conjunction with GetTimeStamp module.
 * @module SetTimeStamp
 * @param {string} id - string id you want to use to retrieve a time stamp from the browser
 * @returns {Date} - Date the timestamp was added
 */
define(["dojo/cookie", "dojo/json"], function (cookie, json) {
  return {
    load: function (id, require, callback) {
      // localStorage test courtesy of Mathtias Bynens: https://mathiasbynens.be/notes/localstorage-pattern
      var storage, fail, uid, d;
      try {
        uid = new Date;
        (storage = window.localStorage).setItem(uid, uid);
        fail = storage.getItem(uid) != uid;
        storage.removeItem(uid);
        fail && (storage = false);
      } catch (exception) {
        if (cookie.isSupported()) {
          storage = {
            setItem: function (name, value) { cookie(name, value, { expires: 365 }); }
          };
        }
      } finally {
        d = new Date();
        if (storage) {
          storage.setItem(id, json.stringify(d.getTime()/1000));
        } else {
          console.log("I won't remember this.");
        }
        callback(d);
      }
    }
  }
});