Update app.py

app.py

@@ -51,9 +51,10 @@ app.layout = dbc.Container([
     ], className="my-3"),
     dbc.Button("Split PDF", id='split-button', color="primary", className="mt-3", disabled=True),
     dbc.Progress(id='progress-bar', className="my-3"),
-    dbc.Spinner(id="processing-spinner", color="primary", type="border", children=[
+    html.Div([
+        dbc.Spinner(id="processing-spinner", color="primary", type="border"),
         html.Div(id='processing-status')
-    ]),
+    ], id='processing-container'),
     dbc.Button("Download ZIP", id='download-button', color="success", className="mt-3", disabled=True),
     dcc.Download(id="download-zip"),
     html.Div(id='log-output', style={'whiteSpace': 'pre-line'}),
@@ -172,17 +173,18 @@ def process_pdf(contents, filename, ranges):
     Output('progress-bar', 'value'),
     Output('processing-status', 'children', allow_duplicate=True),
     Output('download-button', 'disabled', allow_duplicate=True),
+    Output('processing-spinner', 'children'),
     Input('interval-component', 'n_intervals'),
     prevent_initial_call=True
 )
 def update_progress(n):
     global progress, is_processing, generated_file
     if is_processing:
-        return progress, f"Processing... {progress:.0f}% complete", True
+        return progress, f"Processing... {progress:.0f}% complete", True, html.Div()
     elif progress == 100 and generated_file is not None:
-        return 100, "PDF splitting completed. Click 'Download ZIP' to get your files.", False
+        return 100, "PDF splitting completed. Click 'Download ZIP' to get your files.", False, None
     elif progress == -1:
-        return 0, "Error occurred during PDF splitting. Please try again.", True
+        return 0, "Error occurred during PDF splitting. Please try again.", True, None
     else:
         raise PreventUpdate