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

**What is the current behavior?**
In mobile Safari, DOM events originating from elements rendered through a Portal do **not** bubble (propagate) up the React component tree.

**If the current behavior is a bug, please provide the steps to reproduce....**
Please see the following JSFiddle: https://jsfiddle.net/zebulonj/wf7orwan/

In this JSFiddle, the expected behavior (seen in a desktop browser) is that clicking on the portal content (appearing as a modal, including backdrop) should toggle to the "On" or "Off" indicator rendered in the main content. However, in mobile Safari (iOS 11.1.1), the click events do not propagate.


**What is the expected behavior?**
Click events should propagate up the React component tree.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
Affected: React 16.2
iOS 11.1.1

listenTo(registrationName, doc);
}
function getOwnerDocumentFromRootContainer(
  rootContainerElement: Element | Document,
): Document {
  return rootContainerElement.nodeType === DOCUMENT_NODE
    ? (rootContainerElement: any)
    : rootContainerElement.ownerDocument;
}
function noop() {}
function trapClickOnNonInteractiveElement(node: HTMLElement) {
  
  
  
  
  
  
  
  
  
  node.onclick = noop;
}
function setInitialDOMProperties(
  tag: string,
  domElement: Element,
  rootContainerElement: Element | Document,
  nextProps: Object,
  isCustomComponentTag: boolean,
): void {
  for (const propKey in nextProps) {