update from sparkleup

writing/post-self/qoheleth/index.html

@@ -233,6 +233,7 @@
 </ul>
 </li>
 </ol>
+<span class="control">Expand all</span>
             </article>
             <footer>
                 <p>Page generated on 2020-04-08 16:11</p>
@@ -261,6 +262,22 @@ document.querySelectorAll('li.has-nested').forEach(el => {
     el.querySelector('.toggle').addEventListener('click', () => {
         el.classList.toggle('closed');
     });
+});
+let expanded = false;
+document.querySelector('.control').addEventListener('click', (e) => {
+    expanded = !expanded;
+    if (expanded) {
+        e.target.innerText = 'Collapse all';
+    } else {
+        e.target.innerText = 'Expand all';
+    }
+    document.querySelectorAll('.has-nested').forEach((el) => {
+        if (expanded) {
+            el.classList.remove('closed');
+        } else {
+            el.classList.add('closed')
+        }
+    });
 });
     </script>
     </body>