added javascript

Author: shallcro

markdown/assets/a11y-nav.js

@@ -0,0 +1,23 @@
+document.addEventListener("DOMContentLoaded", function () {
+
+  // Find sidebar navigation
+  const menuItems = document.querySelectorAll(".wy-menu-vertical li");
+
+  menuItems.forEach(item => {
+    const link = item.querySelector("a");
+    const submenu = item.querySelector("ul");
+
+    if (link && submenu) {
+
+      // Initial state
+      link.setAttribute("aria-expanded", item.classList.contains("current") ? "true" : "false");
+
+      link.addEventListener("click", function () {
+        const expanded = link.getAttribute("aria-expanded") === "true";
+        link.setAttribute("aria-expanded", expanded ? "false" : "true");
+      });
+
+    }
+  });
+
+});