Improve intersection observer root detection

2025-09-25 12:11:15 +02:00
parent a26102deb5
commit 8f048f94e0
1 changed files with 9 additions and 1 deletions
@@ -1066,12 +1066,20 @@
                    state.historyPaging.hasMore = true;
                }

+                const scroller = UI.getScrollContainer();
+                const rootIsAncestor = (el, ancestor) => {
+                    try {
+                        if (!ancestor || !(ancestor instanceof Element)) return false;
+                        return ancestor.contains(el);
+                    } catch (err) { return false; }
+                };
+                const root = rootIsAncestor(sentinel, scroller) ? scroller : null;
                const obs = new IntersectionObserver((entries) => {
                    entries.forEach((entry) => {
                        if (!entry.isIntersecting) return;
                        Events.loadMoreHistory();
                    });
-                }, { root: null, rootMargin: '600px 0px', threshold: 0 });
+                }, { root: root, rootMargin: '600px 0px', threshold: 0 });
                obs.observe(sentinel);
                state.historyObserver = obs;
            } catch (err) { /* noop */ }