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-rw-r--r--dom/base/nsDocument.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/dom/base/nsDocument.h b/dom/base/nsDocument.h
index 3725b3c18..d2f97a33e 100644
--- a/dom/base/nsDocument.h
+++ b/dom/base/nsDocument.h
@@ -1341,8 +1341,9 @@ protected:
// Array of observers
nsTObserverArray<nsIDocumentObserver*> mObservers;
- // Array of intersection observers
- nsTArray<RefPtr<mozilla::dom::DOMIntersectionObserver>> mIntersectionObservers;
+ // Hashtable of intersection observers
+ nsTHashtable<nsPtrHashKey<mozilla::dom::DOMIntersectionObserver>>
+ mIntersectionObservers;
// Tracker for animations that are waiting to start.
// nullptr until GetOrCreatePendingAnimationTracker is called.