Add compatibility with IE (Still needed for IE11)

http://stackoverflow.com/questions/16618785/ie8-alternative-to-window-scrolly

Author: meikoudras

modules/menu-container.js

@@ -47,8 +47,8 @@ var MenuContainer = _react2["default"].createClass({
     getMenuPosition: function getMenuPosition(x, y) {
         var menu = _react2["default"].findDOMNode(this.refs.menu);
         var screen = window.screen;
-        var scrollX = window.scrollX;
-        var scrollY = window.scrollY;
+        var scrollX = document.documentElement.scrollTop;
+        var scrollY = document.documentElement.scrollLeft;
         var AvailWidth = screen.AvailWidth;
         var AvailHeight = screen.AvailHeight;
         var offsetWidth = menu.offsetWidth;
@@ -132,4 +132,4 @@ var MenuContainer = _react2["default"].createClass({
 });
 
 exports["default"] = MenuContainer;
-module.exports = exports["default"];
+module.exports = exports["default"];

src/menu-container.js

@@ -35,7 +35,9 @@ const MenuContainer = React.createClass({
     },
     getMenuPosition(x, y) {
         let menu = React.findDOMNode(this.refs.menu);
-        let { screen, scrollX, scrollY } = window,
+        let scrollX = document.documentElement.scrollTop;
+        let scrollY = document.documentElement.scrollLeft;
+        let { screen } = window,
             { AvailWidth, AvailHeight } = screen,
             { offsetWidth, offsetHeight } = menu,
             menuStyles = {};