function handlePropertyChange(nativeEvent) {
  if (nativeEvent.propertyName !== 'value') {
    return;
  }
  var value = nativeEvent.srcElement.value;
  if (value === activeElementValue) {
    return;
  }
  activeElementValue = value;

  manualDispatchChangeEvent(nativeEvent);
}
(For old IE.) Handles a propertychange event, sending a `change` event if
the value of the active element has changed.