Remove placeholder/textarea check, use contentToUse instead

src/renderers/dom/shared/ReactDOMComponent.js

@@ -461,20 +461,6 @@ function isCustomComponent(tagName, props) {
   return tagName.indexOf('-') >= 0 || props.is != null;
 }
 
-function shouldSetNodeTextContent(lazyTree, props, text) {
-  // TODO: Validate that text is allowed as a child of this node
-  var node = lazyTree.node;
-  // Avoid setting textContent on textareas when the text is empty
-  // and there is a placeholder. In IE11 setting textContent will cause
-  // the placeholder to not show within the textarea until it has been
-  // focused and blurred again.
-  // https://github.com/facebook/react/issues/6731#issuecomment-254874553
-  if (node.type === 'textarea' && props.placeholder && text === '') {
-    return false;
-  }
-  return true;
-}
-
 var globalIdCounter = 1;
 
 /**
@@ -861,8 +847,13 @@ ReactDOMComponent.Mixin = {
       var contentToUse =
         CONTENT_TYPES[typeof props.children] ? props.children : null;
       var childrenToUse = contentToUse != null ? null : props.children;
+      // TODO: Validate that text is allowed as a child of this node
       if (contentToUse != null) {
-        if (shouldSetNodeTextContent(lazyTree, props, contentToUse)) {
+        // // Avoid setting textContent when the text is empty. In IE11 setting
+        // textContent on a text area will cause the placeholder to not
+        // show within the textarea until it has been focused and blurred again.
+        // https://github.com/facebook/react/issues/6731#issuecomment-254874553
+        if (contentToUse !== '') {
           if (__DEV__) {
             setAndValidateContentChildDev.call(this, contentToUse);
           }