**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
);
  };
  warnForPropDifference = function(
    propName: string,
    serverValue: mixed,
    clientValue: mixed,
  ) {
    if (didWarnInvalidHydration) {
      return;
    }
    const normalizedClientValue = normalizeMarkupForTextOrAttribute(
      clientValue,
    );
    const normalizedServerValue = normalizeMarkupForTextOrAttribute(
      serverValue,
    );
    if (normalizedServerValue === normalizedClientValue) {
      return;
    }
    didWarnInvalidHydration = true;
    warningWithoutStack(
      false,
      'Prop `%s` did not match. Server: %s Client: %s',
      propName,
      JSON.stringify(normalizedServerValue),
      JSON.stringify(normalizedClientValue),
    );
  };
  warnForExtraAttributes = function(attributeNames: Set<string>) {
    if (didWarnInvalidHydration) {