[templates] Expand accordion on hash change for homepage anchors

vrobbler/templates/scrobbles/scrobble_list.html

@@ -246,27 +246,37 @@
     // Expand the accordion section matching the anchor before jumping to it.
     // Anchor links in the summary strip point to #home-<type>, which lives
     // inside a collapsed Bootstrap collapse panel. If the panel is hidden the
-    // browser cannot scroll to the target, so open it first.
+    // browser cannot scroll to the target, so open it first. Runs both on
-    (function () {
+    // initial load and on every hash change, since the summary links are
+    // same-page anchors that do not reload the page.
+    function jumpToHomeAnchor() {
         var hash = window.location.hash
         if (!hash || hash.indexOf('#home-') !== 0) {
             return
         }
         var slug = hash.slice('#home-'.length)
         var collapse = document.getElementById('collapse-' + slug)
-        if (collapse && !collapse.classList.contains('show')) {
+        if (!collapse) {
-            var instance = bootstrap.Collapse.getOrCreateInstance(collapse, {
+            return
-                toggle: false
-            })
-            instance.show()
-            collapse.addEventListener('shown.bs.collapse', function () {
-                var target = document.getElementById(hash.slice(1))
-                if (target && target.scrollIntoView) {
-                    target.scrollIntoView()
-                }
-            })
         }
-    })()
+        function scrollToTarget() {
+            var target = document.getElementById(hash.slice(1))
+            if (target && target.scrollIntoView) {
+                target.scrollIntoView()
+            }
+        }
+        if (collapse.classList.contains('show')) {
+            scrollToTarget()
+            return
+        }
+        var instance = bootstrap.Collapse.getOrCreateInstance(collapse, {
+            toggle: false
+        })
+        instance.show()
+        collapse.addEventListener('shown.bs.collapse', scrollToTarget)
+    }
+    jumpToHomeAnchor()
+    window.addEventListener('hashchange', jumpToHomeAnchor)
 
     // Graphs
     var ctx = document.getElementById('myChart')