Function removeIfEmptyData

test/angular/1.7/angular.js:3287–3298

(element)

}

function removeIfEmptyData(element) {
  var expandoId = element.ng339;
  var expandoStore = expandoId && jqCache[expandoId];

  var events = expandoStore && expandoStore.events;
  var data = expandoStore && expandoStore.data;

  if ((!data || isEmptyObject(data)) && (!events || isEmptyObject(events))) {
    delete jqCache[expandoId];
    element.ng339 = undefined; // don't delete DOM expandos. IE and Chrome don't like it
  }
}

function jqLiteOff(element, type, fn, unsupported) {
  if (isDefined(unsupported)) throw jqLiteMinErr('offargs', 'jqLite#off() does not support the `selector` argument');