getOrCreateDomEventListener method

dynamic getOrCreateDomEventListener(
  1. EventListener fn
)

Implementation

DomEventListener getOrCreateDomEventListener(EventListener fn) {
  final DomEventListener jsListener = createDomEventListener((DomEvent event) {
    fn(event);
  });
  return _popStateListenersCache.putIfAbsent(fn, () => jsListener);
}