fix(javascript): move away from scrollY IE doesn't support (#2428)

Author: Akira Sudoh

src/components/detail-page-header/detail-page-header.js

@@ -26,8 +26,8 @@ class DetailPageHeader extends mixin(createComponent, initComponentBySearch) {
    */
   _handleScroll() {
     let scrollPosition;
-    if (this.element.ownerDocument.defaultView.scrollY) {
-      scrollPosition = this.element.ownerDocument.defaultView.scrollY;
+    if (this.element.ownerDocument.defaultView.pageYOffset) {
+      scrollPosition = this.element.ownerDocument.defaultView.pageYOffset;
     } else {
       scrollPosition = this.element.ownerDocument.defaultView.pageYOffset;
     }

src/globals/js/misc/menu-placement.js

@@ -32,7 +32,7 @@ export function placeMenu(menu, menuContents, offset, direction) {
   const menuPosition = menu.getBoundingClientRect();
   const menuHeight = menuPosition.height;
   const menuWidth = menuPosition.width;
-  const scroll = menu.ownerDocument.defaultView.scrollY;
+  const scroll = menu.ownerDocument.defaultView.pageYOffset;
 
   const menuContentsPosition = menuContents.getBoundingClientRect();
   const menuContentsHeight = menuContentsPosition.height;