feat(app): better diff/code comments (#14621)

Co-authored-by: adamelmore <[email protected]>
Co-authored-by: David Hill <[email protected]>

1 files changed, 10 insertions, 2 deletions

diff --git a/packages/app/src/context/layout-scroll.ts b/packages/app/src/context/layout-scroll.ts
index 30b0f6904..ef66eccd9 100644
--- a/packages/app/src/context/layout-scroll.ts
+++ b/packages/app/src/context/layout-scroll.ts
@@ -33,8 +33,16 @@ export function createScrollPersistence(opts: Options) {
   }
 
   function seed(sessionKey: string) {
-    if (cache[sessionKey]) return
-    setCache(sessionKey, clone(opts.getSnapshot(sessionKey)))
+    const next = clone(opts.getSnapshot(sessionKey))
+    const current = cache[sessionKey]
+    if (!current) {
+      setCache(sessionKey, next)
+      return
+    }
+
+    if (Object.keys(current).length > 0) return
+    if (Object.keys(next).length === 0) return
+    setCache(sessionKey, next)
   }
 
   function scroll(sessionKey: string, tab: string) {