Remove full page rendering and restrict rendering into head

src/core/ReactComponentBrowserEnvironment.js

@@ -27,11 +27,9 @@ var ReactReconcileTransaction = require('ReactReconcileTransaction');
 
 var getReactRootElementInContainer = require('getReactRootElementInContainer');
 var invariant = require('invariant');
-var mutateHTMLNodeWithMarkup = require('mutateHTMLNodeWithMarkup');
 
 
 var ELEMENT_NODE_TYPE = 1;
-var DOC_NODE_TYPE = 9;
 
 
 /**
@@ -82,10 +80,7 @@ var ReactComponentBrowserEnvironment = {
    */
   mountImageIntoNode: function(markup, container, shouldReuseMarkup) {
     invariant(
-      container && (
-        container.nodeType === ELEMENT_NODE_TYPE ||
-        container.nodeType === DOC_NODE_TYPE && ReactMount.allowFullPageRender
-      ),
+      container && container.nodeType === ELEMENT_NODE_TYPE,
       'mountComponentIntoNode(...): Target container is not valid.'
     );
     if (shouldReuseMarkup) {
@@ -108,14 +103,6 @@ var ReactComponentBrowserEnvironment = {
       }
     }
 
-    // You can't naively set the innerHTML of the entire document. You need
-    // to mutate documentElement which requires doing some crazy tricks. See
-    // mutateHTMLNodeWithMarkup()
-    if (container.nodeType === DOC_NODE_TYPE) {
-      mutateHTMLNodeWithMarkup(container.documentElement, markup);
-      return;
-    }
-
     // Asynchronously inject markup by ensuring that the container is not in
     // the document when settings its `innerHTML`.
     var parent = container.parentNode;

src/core/ReactMount.js

@@ -33,7 +33,6 @@ var ATTR_NAME = 'data-reactid';
 var nodeCache = {};
 
 var ELEMENT_NODE_TYPE = 1;
-var DOC_NODE_TYPE = 9;
 
 /** Mapping from reactRootID to React component instance. */
 var instancesByReactRootID = {};
@@ -175,11 +174,6 @@ function purgeID(id) {
  * Inside of `container`, the first element rendered is the "reactRoot".
  */
 var ReactMount = {
-  /**
-   * Safety guard to prevent accidentally rendering over the entire HTML tree.
-   */
-  allowFullPageRender: false,
-
   /** Time spent generating markup. */
   totalInstantiationTime: 0,
 
@@ -213,10 +207,9 @@ var ReactMount = {
    */
   prepareEnvironmentForDOM: function(container) {
     invariant(
-      container && (
-        container.nodeType === ELEMENT_NODE_TYPE ||
-        container.nodeType === DOC_NODE_TYPE
-      ),
+      container &&
+      container.nodeType === ELEMENT_NODE_TYPE &&
+      container.tagName !== 'HEAD',
       'prepareEnvironmentForDOM(...): Target container is not a DOM element.'
     );
     var doc = container.nodeType === ELEMENT_NODE_TYPE ?
@@ -431,10 +424,6 @@ var ReactMount = {
   unmountComponentFromNode: function(instance, container) {
     instance.unmountComponent();
 
-    if (container.nodeType === DOC_NODE_TYPE) {
-      container = container.documentElement;
-    }
-
     // http://jsperf.com/emptying-a-node
     while (container.lastChild) {
       container.removeChild(container.lastChild);