I wonder why the undo button does not change anything for my app, which has input box and button.
My function looks like this:
@app.callback(Output('Docs', 'children'), [Input('button', 'n_clicks')], [State('input', 'value')]) def clean_data(n_clicks, input): if n_clicks is not None and input is not None: return ...
So for example, I enter “Option A” in the input box and click the button, then enter “Option B” in the input box and click the button. Then clicking undo nothing is changed. I am hoping that the undo can go back to “Option A”. What can I do to to make it work?