Update app.py

app.py

@@ -21,7 +21,7 @@ with gr.Blocks(theme='Taithrah/Minimal') as demo:
                 dropdown.render()
                 toggle_dark = gr.Button(value="Toggle Dark", scale=1)
 
-    dropdown.change(None, dropdown, None, _js=js)
+    dropdown.change(lambda value: None, dropdown, None)
     toggle_dark.click(
         None,
         _js="""