1 files changed, 50 insertions, 0 deletions
diff --git a/node_modules/fbjs/lib/getElementRect.js b/node_modules/fbjs/lib/getElementRect.js
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index 000000000..27f85b122
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+++ b/node_modules/fbjs/lib/getElementRect.js
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+'use strict';
+
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @typechecks
+ */
+
+var containsNode = require('./containsNode');
+
+/**
+ * Gets an element's bounding rect in pixels relative to the viewport.
+ *
+ * @param {DOMElement} elem
+ * @return {object}
+ */
+function getElementRect(elem) {
+  var docElem = elem.ownerDocument.documentElement;
+
+  // FF 2, Safari 3 and Opera 9.5- do not support getBoundingClientRect().
+  // IE9- will throw if the element is not in the document.
+  if (!('getBoundingClientRect' in elem) || !containsNode(docElem, elem)) {
+    return {
+      left: 0,
+      right: 0,
+      top: 0,
+      bottom: 0
+    };
+  }
+
+  // Subtracts clientTop/Left because IE8- added a 2px border to the
+  // <html> element (see http://fburl.com/1493213). IE 7 in
+  // Quicksmode does not report clientLeft/clientTop so there
+  // will be an unaccounted offset of 2px when in quirksmode
+  var rect = elem.getBoundingClientRect();
+
+  return {
+    left: Math.round(rect.left) - docElem.clientLeft,
+    right: Math.round(rect.right) - docElem.clientLeft,
+    top: Math.round(rect.top) - docElem.clientTop,
+    bottom: Math.round(rect.bottom) - docElem.clientTop
+  };
+}
+
+module.exports = getElementRect;
+\ No newline at end of file