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This repository was archived by the owner on Aug 29, 2025. It is now read-only.
This repository was archived by the owner on Aug 29, 2025. It is now read-only.

'undo' does not work when actions applied to two different components consecutively #66

Description

@rmarren1

I noticed that 'undo' will not work if the previous two user interactions were applied to different components. For example, if interaction 1 is applied to component A and interaction 2 is applied to component B, then the undo button will do nothing. If both interactions are applied to the same component, then the last interaction will be undone as expected.

Reproducible example:
ezgif com-video-to-gif 1

import dash
import dash_html_components as html
import dash_core_components as dcc
from dash.dependencies import Input, Output

app = dash.Dash()
app.scripts.config.serve_locally = True

app.layout = html.Div([
    html.Button(id='click', children='click'),
    html.Div(id='output', children=''),
    dcc.RadioItems(
        id='radio',
        options=[{
            'label': 'good',
            'value': 'good'
            },
            {
            'label': 'bad',
            'value': 'bad'
            }],
        value='good')
])

@app.callback(Output('output', 'children'),
              [Input('click', 'n_clicks'),
               Input('radio', 'value')])
def crash_it(clicks, radio):
    return clicks

app.run_server(debug=True, port=8000)

Versions:

dash==0.23.1
dash-core-components==0.26.0
dash-html-components==0.11.0
dash-renderer==0.13.0

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