WIP - add extractor, generate snippet_data

node_modules/fbjs/lib/getActiveElement.js

@@ -0,0 +1,40 @@
+"use strict";
+
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @typechecks
+ */
+
+/* eslint-disable fb-www/typeof-undefined */
+
+/**
+ * Same as document.activeElement but wraps in a try-catch block. In IE it is
+ * not safe to call document.activeElement if there is nothing focused.
+ *
+ * The activeElement will be null only if the document or document body is not
+ * yet defined.
+ *
+ * @param {?DOMDocument} doc Defaults to current document.
+ * @return {?DOMElement}
+ */
+function getActiveElement(doc)
+/*?DOMElement*/
+{
+  doc = doc || (typeof document !== 'undefined' ? document : undefined);
+
+  if (typeof doc === 'undefined') {
+    return null;
+  }
+
+  try {
+    return doc.activeElement || doc.body;
+  } catch (e) {
+    return doc.body;
+  }
+}
+
+module.exports = getActiveElement;