**Do you want to request a *feature* or report a *bug*?**

bug? Maybe.

**What is the current behavior?**

Using non-delegated handler for submit event.

**What is the expected behavior?**

After IE9, at least I know, submit event bubbled up.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

16.2.0
}
export function diffHydratedProperties(
  domElement: Element,
  tag: string,
  rawProps: Object,
  parentNamespace: string,
  rootContainerElement: Element | Document,
): null | Array<mixed> {
  let isCustomComponentTag;
  let extraAttributeNames: Set<string>;
  if (__DEV__) {
    suppressHydrationWarning = rawProps[SUPPRESS_HYDRATION_WARNING] === true;
    isCustomComponentTag = isCustomComponent(tag, rawProps);
    validatePropertiesInDevelopment(tag, rawProps);
    if (
      isCustomComponentTag &&
      !didWarnShadyDOM &&
      (domElement: any).shadyRoot
    ) {
      warning(
        false,
        '%s is using shady DOM. Using shady DOM with React can ' +
          'cause things to break subtly.',
        getCurrentFiberOwnerNameInDevOrNull() || 'A component',
      );
      didWarnShadyDOM = true;
    }
  }
  
  switch (tag) {