Function createRootImpl

lib/assets/react-source/development/react.js:28317–28330

(container, tag, options)

	};

	function createRootImpl(container, tag, options) {
	  // Tag is either LegacyRoot or Concurrent Root
	  var hydrate = options != null && options.hydrate === true;
	  var hydrationCallbacks = options != null && options.hydrationOptions || null;
	  var root = createContainer(container, tag, hydrate);
	  markContainerAsRoot(root.current, container);

	  if (hydrate && tag !== LegacyRoot) {
	    var doc = container.nodeType === DOCUMENT_NODE ? container : container.ownerDocument;
	    eagerlyTrapReplayableEvents(container, doc);
	  }

	  return root;
	}
	function createLegacyRoot(container, options) {
	  return new ReactDOMBlockingRoot(container, LegacyRoot, options);
	}