code: function abortXHRRequest(uid, fn) {
    if (reqs.hasOwnProperty(uid)) {
      if (!reqs[uid]) return;
  
      if (fn) {
        fn();
      } else {
        reqs[uid].abort();
      }
      delete reqs[uid];
      return reqs;
    }
  }
docs: abortXHRRequest
  Abort a XHR request by 'uid'
  @param {String} uid
  @param {Function} optional function
  @return {Object}