Remove view transitions and restore hidden-only event filtering

contao/templates/frontend/event_filter.html.twig

@@ -37,21 +37,6 @@
     <p id="eventfilter-status" class="visually-hidden" aria-live="polite"></p>
 </div>
 
-<style>
-    .event-filter-target-list {
-        view-transition-name: event-filter-list;
-    }
-
-    @media (prefers-reduced-motion: no-preference) {
-        ::view-transition-group(event-filter-list),
-        ::view-transition-old(event-filter-list),
-        ::view-transition-new(event-filter-list) {
-            animation-duration: 240ms;
-            animation-timing-function: ease;
-        }
-    }
-</style>
-
 <script type="module">
     const filters = document.getElementById('eventfilters');
 
@@ -129,34 +114,9 @@
     const stateStorageKey = 'event-filter-state';
     const stateQueryKey = 'event_filter';
 
-    const animationMs = 220;
-    let hideTimers = new WeakMap();
-    const supportsViewTransitions = typeof document.startViewTransition === 'function';
-    let isViewTransitionMutation = false;
     let currentFilter = { type: 'all', value: '' };
     let suppressedChangeEvents = 0;
 
-    const runWithLayoutTransition = (mutation) => {
-        if (!supportsViewTransitions) {
-            mutation();
-            return;
-        }
-
-        try {
-            document.startViewTransition(() => {
-                isViewTransitionMutation = true;
-
-                try {
-                    mutation();
-                } finally {
-                    isViewTransitionMutation = false;
-                }
-            });
-        } catch (error) {
-            mutation();
-        }
-    };
-
     const hasOptionValue = (selectElement, value) => {
         if (!selectElement) {
             return false;
@@ -280,50 +240,12 @@
         }
     };
 
-    const clearHideTimer = (eventItem) => {
-        const timer = hideTimers.get(eventItem);
-
-        if (timer) {
-            window.clearTimeout(timer);
-            hideTimers.delete(eventItem);
-        }
-    };
-
     const showEvent = (eventItem) => {
-        clearHideTimer(eventItem);
+        eventItem.hidden = false;
-
-        if (eventItem.hidden) {
-            if (supportsViewTransitions && !isViewTransitionMutation) {
-                runWithLayoutTransition(() => {
-                    eventItem.hidden = false;
-                });
-            } else {
-                eventItem.hidden = false;
-            }
-        }
-
-        requestAnimationFrame(() => {
-            eventItem.classList.remove('is-filtered-out');
-        });
     };
 
     const hideEvent = (eventItem) => {
-        clearHideTimer(eventItem);
+        eventItem.hidden = true;
-        eventItem.classList.add('is-filtered-out');
-
-        const timer = window.setTimeout(() => {
-            if (supportsViewTransitions && !isViewTransitionMutation) {
-                runWithLayoutTransition(() => {
-                    eventItem.hidden = true;
-                });
-            } else {
-                eventItem.hidden = true;
-            }
-
-            hideTimers.delete(eventItem);
-        }, animationMs);
-
-        hideTimers.set(eventItem, timer);
     };
 
     const setActiveControl = ({ type, value }) => {
@@ -411,14 +333,12 @@
         currentFilter = filterState;
         setActiveControl(filterState);
 
-        runWithLayoutTransition(() => {
+        events.forEach((eventItem) => {
-            events.forEach((eventItem) => {
+            if (matches(eventItem, filterState)) {
-                if (matches(eventItem, filterState)) {
+                showEvent(eventItem);
-                    showEvent(eventItem);
+            } else {
-                } else {
+                hideEvent(eventItem);
-                    hideEvent(eventItem);
+            }
-                }
-            });
         });
 
         updateStatus(filterState);