dcc.Loading not working

Dash Python
#1 
        html.Div(id='btn_plot_area_top_cont_'+setting_id, children=[
            dcc.Loading(id=f'btn_plot_loading_top_'+setting_id, type='circle', children=[
                html.Div(id='btn_plot_area_top_'+setting_id, children=[
                    html.Div(children='データを選択してください', 
                    className="raised2",
                    id='btn_plot_'+setting_id,
                    style=button_style)
                ])
            ]),
        ], style={'display':'inline-block'})
   app.callback(
        [Output('select_data_{0}'.format(_test_id), 'children'),
         Output('btn_plot_area_top_{0}'.format(_test_id), 'children'),
         Output('btn_plot_area_{0}'.format(_test_id), 'children'),
         Output('input-edit-top-No-{0}'.format(_test_id), 'value'),
         Output('input-edit-top-driver-{0}'.format(_test_id), 'value'),
         Output('input-edit-top-comment-{0}'.format(_test_id), 'value'),
         Output('input-edit-No-{0}'.format(_test_id), 'value'),
         Output('input-edit-driver-{0}'.format(_test_id), 'value'),
         Output('input-edit-comment-{0}'.format(_test_id), 'value'),
         Output('datum_real_or_sim_{0}'.format(_test_id), 'value')],
        [Input('real-file-table-{0}'.format(_test_id), 'selected_row_ids'),
         Input('sim-file-table-{0}'.format(_test_id), 'selected_row_ids'),
         Input('real-file-table-{0}'.format(_test_id), 'selected_rows'),
         Input('sim-file-table-{0}'.format(_test_id), 'selected_rows'),
         # タブ変更時にも即表示させたいため、State→Inputへ変更
         Input('hidden_real_or_sim', 'value')],
        [State('select_data_{0}'.format(_test_id), 'children'),
         State('datum_real_or_sim_{0}'.format(_test_id), 'value')])(
            generate_select_file(_all_analyze_data[_test_id])
         )

why the dcc.Loading not working?

#2

Hi,

Welcome to the community! :slightly_smiling_face:

Please make sure to provide a minimal reproducible example, as explained in the following post:

Thank you!