diff --git a/src/vendor/core/dom/isTextNode.js b/src/vendor/core/dom/isTextNode.js
new file mode 100644
index 0000000000..fb7772a10b
--- /dev/null
+++ b/src/vendor/core/dom/isTextNode.js
@@ -0,0 +1,30 @@
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @providesModule isTextNode
+ * @typechecks
+ */
+
+var isNode = require('isNode');
+
+/**
+ * @param {*} object The object to check.
+ * @return {boolean} Whether or not the object is a DOM text node.
+ */
+function isTextNode(object) {
+  return isNode(object) && object.nodeType == 3;
+}
+
+module.exports = isTextNode;
diff --git a/src/vendor/core/dom/nodeContains.js b/src/vendor/core/dom/nodeContains.js
new file mode 100644
index 0000000000..1eadd340a0
--- /dev/null
+++ b/src/vendor/core/dom/nodeContains.js
@@ -0,0 +1,49 @@
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @providesModule nodeContains
+ * @typechecks
+ */
+
+var isTextNode = require('isTextNode');
+
+/*jslint bitwise:true */
+
+/**
+ * Checks if a given DOM node contains or is another DOM node.
+ *
+ * @param {?DOMNode} outerNode Outer DOM node.
+ * @param {?DOMNode} innerNode Inner DOM node.
+ * @return {boolean} True if `outerNode` contains or is `innerNode`.
+ */
+function nodeContains(outerNode, innerNode) {
+  if (!outerNode || !innerNode) {
+    return false;
+  } else if (outerNode === innerNode) {
+    return true;
+  } else if (isTextNode(outerNode)) {
+    return false;
+  } else if (isTextNode(innerNode)) {
+    return nodeContains(outerNode, innerNode.parentNode);
+  } else if (outerNode.contains) {
+    return outerNode.contains(innerNode);
+  } else if (outerNode.compareDocumentPosition) {
+    return !!(outerNode.compareDocumentPosition(innerNode) & 16);
+  } else {
+    return false;
+  }
+}
+
+module.exports = nodeContains;