Update app.py

app.py

@@ -5,7 +5,7 @@ from gradio.themes.utils.theme_dropdown import create_theme_dropdown
 
 dropdown, js = create_theme_dropdown()
 
-with gr.Blocks(theme='nevreal/orange') as demo:
+with gr.Blocks(theme='nevreal/orange', js="() => {document.body.classList.toggle('dark');}") as demo:
     with gr.Row(equal_height=True):
         with gr.Column(scale=10):
             gr.Markdown(