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

bug

**What is the current behavior?**

React interactivity lost, React crash?

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/ebsrpraL/).**

Run with react-dom.development.js in IE11, not sure exactly what the exact repo steps are the fix I've attempted for IE11 was to simply pass an empty string.

~~~
var normalizeHTML = function (parent, html) {
    if (!testDocument) {
      testDocument = document.implementation.createHTMLDocument(""); // fix for IE11 here
    }
    var testElement = parent.namespaceURI === HTML_NAMESPACE ? testDocument.createElement(parent.tagName) : testDocument.createElementNS(parent.namespaceURI, parent.tagName);
    testElement.innerHTML = html;
    return testElement.innerHTML;
  };
}
~~~

Source https://github.com/facebook/react/blob/e932ad68bed656eed5295b61ba74e5d0857902ed/src/renderers/dom/fiber/ReactDOMFiberComponent.js#L133-L146

MDN docs [here](https://developer.mozilla.org/en-US/docs/Web/API/DOMImplementation/createHTMLDocument).

**What is the expected behavior?**

Well, that React does not crash in dev mode and that interactively continues to work.

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

`react@16.0.0` IE11
if (type === 'script') {
        
        
        var div = ownerDocument.createElement('div');
        div.innerHTML = '<script><' + '/script>'; 
        
        var firstChild = ((div.firstChild: any): HTMLScriptElement);
        domElement = div.removeChild(firstChild);
      } else if (typeof props.is === 'string') {
        
        domElement = ownerDocument.createElement(type, {is: props.is});
      } else {
        
        
        
        domElement = ownerDocument.createElement(type);
      }
    } else {
      domElement = ownerDocument.createElementNS(namespaceURI, type);
    }
    if (__DEV__) {
      if (namespaceURI === HTML_NAMESPACE) {
        if (
          !isCustomComponentTag &&
          Object.prototype.toString.call(domElement) ===
            '[object HTMLUnknownElement]' &&
          !Object.prototype.hasOwnProperty.call(warnedUnknownTags, type)
        ) {
          warnedUnknownTags[type] = true;
          warning(