**Bug**

**What is the current behavior?**

IE11 Windows 10 text area placeholder not rendering initially.
[https://jsfiddle.net/fztx6vqp/](https://jsfiddle.net/fztx6vqp/)

**What is the expected behavior?**

Placeholder should be visible on initial render.

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

16.0.0, IE11, Windows 10
Appears to be a regression in 16.0.0 - #6731 

} else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
          const rawHtml = nextProp ? nextProp[HTML] || '' : '';
          const serverHTML = domElement.innerHTML;
          const expectedHTML = normalizeHTML(domElement, rawHtml);
          if (expectedHTML !== serverHTML) {
            warnForPropDifference(propKey, serverHTML, expectedHTML);
          }
        } else if (propKey === STYLE) {
          
          extraAttributeNames.delete(propKey);
          const expectedStyle = CSSPropertyOperations.createDangerousStringForStyles(
            nextProp,
          );
          serverValue = domElement.getAttribute('style');
          if (expectedStyle !== serverValue) {
            warnForPropDifference(propKey, serverValue, expectedStyle);
          }
        } else if (isCustomComponentTag) {
          
          extraAttributeNames.delete(propKey.toLowerCase());
          serverValue = DOMPropertyOperations.getValueForAttribute(
            domElement,
            propKey,
            nextProp,
          );
          if (nextProp !== serverValue) {
            warnForPropDifference(propKey, serverValue, nextProp);
          }
        } else if (DOMProperty.shouldSetAttribute(propKey, nextProp)) {
          if ((propertyInfo = DOMProperty.getPropertyInfo(propKey))) {