Nikolai Mavrenkov already created a good description of the problem on Stack Overflow: http://stackoverflow.com/questions/36893449/textarea-placeholder-isnt-shown-in-ie-11-being-rendered-using-react

I just can confirm it breaks in IE11, but works in IE10 (and other browsers) with React v15.0.2.

var listenerToPut = this;
  EventPluginHub.putListener(
    listenerToPut.inst,
    listenerToPut.registrationName,
    listenerToPut.listener
  );
}
function inputPostMount() {
  var inst = this;
  ReactDOMInput.postMountWrapper(inst);
}
function textareaPostMount() {