fix scroll: rAF for layout-safe scrollHeight, direction-aware _userScrolledAway

2026-07-14 14:17:57 -07:00
parent 7d50d07249
commit 8ec4dae062
1 changed files with 11 additions and 3 deletions
@@ -1650,7 +1650,11 @@ function toggleDirection() {
 }
 let _userScrolledAway = false;
 document.getElementById('chatContainer')?.addEventListener('scroll', function() {
+    if (_waterfallDirection === 'newest') {
        _userScrolledAway = this.scrollTop > 100;
+    } else {
+        _userScrolledAway = this.scrollTop < this.scrollHeight - this.clientHeight - 60;
+    }
 }, { passive: true });
 function scrollToLatest() {
    const c = document.getElementById('chatContainer');
@@ -1659,7 +1663,11 @@ function scrollToLatest() {
        if (_userScrolledAway) return;
        c.scrollTop = 0;
    } else {
-        c.scrollTop = c.scrollHeight;
+        if (_userScrolledAway) return;
+        requestAnimationFrame(() => {
+            const cc = document.getElementById('chatContainer');
+            if (cc) cc.scrollTop = cc.scrollHeight;
+        });
    }
 }
 function resetScrollLock() { _userScrolledAway = false; }