fix

app.py

@@ -304,17 +304,17 @@ with gr.Blocks() as demo:
     )
 
     image_bef.change(
-                fn=None,
-                inputs=[image_bef],
-                outputs=[],
-                js="(image) => { initializeEditor(); importBackground(image); return []; }",
-            )
+        fn=None,
+        inputs=[image_bef],
+        outputs=[],
+        _js="(image) => { initializeEditor(); importBackground(image); return []; }",
+    )
 
     image_aft.change(
         fn=None,
         inputs=[image_aft],
         outputs=[],
-        js="(image) => { initializeEditor(); importBackground(image); return []; }",
+        _js="(image) => { initializeEditor(); importBackground(image); return []; }",
     )