Function findEventHandler

src/fire-event.ts:73–92

(
  instance: TestInstance,
  eventName: string,
  nearestTouchResponder?: TestInstance,
)

}

function findEventHandler(
  instance: TestInstance,
  eventName: string,
  nearestTouchResponder?: TestInstance,
): EventHandler | null {
  const touchResponder = isTouchResponder(instance) ? instance : nearestTouchResponder;

  const handler =
    getEventHandlerFromProps(instance.props, eventName, { loose: true }) ??
    findEventHandlerFromFiber(instance.unstable_fiber, eventName);
  if (handler && isEventEnabled(instance, eventName, touchResponder)) {
    return handler;
  }

  if (instance.parent === null) {
    return null;
  }

  return findEventHandler(instance.parent, eventName, touchResponder);
}

function findEventHandlerFromFiber(fiber: Fiber | null, eventName: string): EventHandler | null {
  // Container fibers have memoizedProps set to null