adjustments specs to dict

Author: BSd3v

CHANGELOG.md

@@ -8,6 +8,9 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## Fixed
 - [#3279](https://github.com/plotly/dash/pull/3279) Fix an issue where persisted values were incorrectly pruned when updated via callback. Now, callback returned values are correctly stored in the persistence storage. Fix [#2678](https://github.com/plotly/dash/issues/2678)
 
+## Added
+- [#3294](https://github.com/plotly/dash/pull/3294) Added the ability to pass `allow_optional` to Input and State to allow callbacks to work even if these components are not in the dash layout.
+
 ## [3.0.4] - 2025-04-24
 
 ## Fixed

dash/dependencies.py

@@ -59,7 +59,9 @@ def component_id_str(self) -> str:
 
     def to_dict(self) -> dict:
         specs = {"id": self.component_id_str(), "property": self.component_property}
-        return {**specs, "allow_optional": True} if self.allow_optional else specs
+        if self.allow_optional:
+            specs["allow_optional"] = True
+        return specs
 
     def __eq__(self, other):
         """