Revert "Removed closeSubMenu behavior - DP-19336"

This reverts commit d138bbe.

patternlab/styleguide/source/assets/js/modules/mainNavHamburger.js

@@ -119,7 +119,15 @@ if (null !== menuButton) {
 
   subItems.style.opacity = "0";
 
+  itemButton.addEventListener("focus", function(e){
+    closeSubMenus(item);
+  });
+
   itemButton.addEventListener("click", function (e) {
+
+    closeSubMenus(item);
+
+
     if (item.classList.contains("submenu-open")) {
       item.classList.remove("submenu-open");
       itemButton.setAttribute("aria-expanded", "false");
@@ -320,11 +328,38 @@ function commonOpenMenuTasks() {
   }
 }
 
+function closeSubMenus(item) {
+  //Close other open submenus
+  let siblings = [];
+  let thisSibling = item.parentNode.firstChild;
+
+  while (thisSibling) {
+    if (thisSibling !== item && thisSibling.nodeType === Node.ELEMENT_NODE)
+      siblings.push(thisSibling);
+    thisSibling = thisSibling.nextElementSibling || thisSibling.nextSibling;
+  }
+
+  for (let i = 0; i < siblings.length; i++) {
+    if (siblings[i].classList.contains("submenu-open")) {
+
+      setTimeout(function timeoutFunction() {
+        siblings[i].querySelector(".js-main-nav-hamburger-content").style.height = "0";
+        siblings[i].querySelector(".js-main-nav-hamburger-content").classList.add("is-closed");
+        siblings[i].querySelector(".js-main-nav-hamburger__container").style.opacity = "0";
+        siblings[i].classList.remove("submenu-open");
+        siblings[i].querySelector(".js-main-nav-hamburger__top-link").setAttribute("aria-expanded", "false");
+      }, 500);
+
+    }
+  }
+}
+
 // Close menu when utility nav is clicked
 if (null !== utilNavWide) {
     closeMenu();
 }
 
+
 // Close and reset menu on overlay click
 if (null !== menuOverlay) {
   menuOverlay.addEventListener("click", function () {