LibWeb/IDB: Implement IDBObjectStore::transaction

Author: https://github.com/stelar7
Commit: https://github.com/LadybirdBrowser/ladybird/commit/b0453e044d4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4077
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/IDBObjectStore.h

@@ -24,6 +24,7 @@ public:
     [[nodiscard]] static GC::Ref<IDBObjectStore> create(JS::Realm&, GC::Ref<ObjectStore>, GC::Ref<IDBTransaction>);
 
     JS::Value key_path() const;
+    GC::Ref<IDBTransaction> transaction() const { return m_transaction; }
 
 protected:
     explicit IDBObjectStore(JS::Realm&, GC::Ref<ObjectStore>, GC::Ref<IDBTransaction>);

Libraries/LibWeb/IndexedDB/IDBObjectStore.idl

@@ -7,7 +7,7 @@ interface IDBObjectStore {
     [FIXME] attribute DOMString name;
     readonly attribute any keyPath;
     [FIXME] readonly attribute DOMStringList indexNames;
-    [FIXME, SameObject] readonly attribute IDBTransaction transaction;
+    [SameObject] readonly attribute IDBTransaction transaction;
     [FIXME] readonly attribute boolean autoIncrement;
     
     [FIXME, NewObject] IDBRequest put(any value, optional any key);