[TASK] add js

templates/app.js

@@ -0,0 +1,17 @@
+document.addEventListener('DOMContentLoaded', function() {
+  toggleSummary();
+});
+
+function toggleSummary() {
+  const openBtn = document.querySelector('#open-js');
+  const closeBtn = document.querySelector('#close-js');
+  const detailElements = document.querySelectorAll('detail');
+
+  openBtn.addEventListener('click', function(){
+    detailElements.forEach((detail) =>  detail.setAttribute("open", ""));
+  });
+
+  closeBtn.addEventListener('click', function(){
+    detailElements.forEach((detail) =>  detail.setAttribute("open", ""));
+  });
+}