**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 warnForInsertedHydratedElement(
  parentNode: Element | Document,
  tag: string,
  props: Object,
) {
  if (__DEV__) {
    if (didWarnInvalidHydration) {
      return;
    }
    didWarnInvalidHydration = true;
    warningWithoutStack(
      false,
      'Expected server HTML to contain a matching <%s> in <%s>.',
      tag,
      parentNode.nodeName.toLowerCase(),
    );
  }
}
export function warnForInsertedHydratedText(
  parentNode: Element | Document,
  text: string,
) {
  if (__DEV__) {
    if (text === '') {
      
      
      
      
      return;
    }