**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 

return markupString
      .replace(NORMALIZE_NEWLINES_REGEX, '\n')
      .replace(NORMALIZE_NULL_AND_REPLACEMENT_REGEX, '');
  };
  var warnForTextDifference = function(
    serverText: string,
    clientText: string | number,
  ) {
    if (didWarnInvalidHydration) {
      return;
    }
    const normalizedClientText = normalizeMarkupForTextOrAttribute(clientText);
    const normalizedServerText = normalizeMarkupForTextOrAttribute(serverText);
    if (normalizedServerText === normalizedClientText) {
      return;
    }
    didWarnInvalidHydration = true;
    warning(
      false,
      'Text content did not match. Server: "%s" Client: "%s"',
      normalizedServerText,
      normalizedClientText,
    );
  };
  var warnForPropDifference = function(
    propName: string,
    serverValue: mixed,
    clientValue: mixed,
  ) {
    if (didWarnInvalidHydration) {