Initial commit.

themes/blowfish/assets/js/mobilemenu.js

@@ -0,0 +1,33 @@
+var menuButton = document.getElementById("menu-button");
+var menuCloseButton = document.getElementById("menu-close-button");
+var menuWrapper = document.getElementById("menu-wrapper");
+
+var menuOpen = false;
+
+var openMenu = function (e) {
+  if (!menuOpen) {
+    menuOpen = true;
+    document.body.style.overflowY = "hidden";
+    menuButton.style.visibility = "hidden";
+    menuWrapper.style.visibility = "visible";
+    menuWrapper.style.opacity = "1";
+    window.onbeforeunload = function (event) {
+      closeMenu()
+    }
+  }
+};
+
+var closeMenu = function (e) {
+  if (menuOpen) {
+    menuOpen = false;
+    document.body.style.overflowY = "auto";
+    menuButton.style.visibility = "visible";
+    menuWrapper.style.visibility = "hidden";
+    menuWrapper.style.opacity = "0";
+    window.onbeforeunload = function (event) { }
+    e.stopPropagation();
+  }
+}
+
+menuButton.addEventListener("click", openMenu);
+menuCloseButton.addEventListener("click", closeMenu);