Output MATCH ids with specific string

Dash Python
4

Now I understand what you are after. Actually pattern matching callbacks don’t work like that.

The MATCH does not refer to value but rather to a matching component. Take this example:

from dash import Dash, html, Input, Output, MATCH, ctx

app = Dash(__name__)
app.layout = html.Div(
    [
        html.Div(
            [
                html.Button(f'button_{idx}', id={'type': 'btn', 'index': idx})
                for idx in range(3)
            ]
        ),
        html.Div(
            [
                html.Div(id={'type': 'out', 'index': idx})
                for idx in range(3)
            ]
        )
    ]
)


@app.callback(
    Output({'type': 'out', 'index': MATCH}, 'children'),
    Input({'type': 'btn', 'index': MATCH}, 'n_clicks'),
    prevent_initial_call=True
)
def output(n_clicks):
    triggered_index = ctx.triggered_id.index
    return f'button wth index {triggered_index} has been clicked {n_clicks} times.'


if __name__ == '__main__':
    app.run(debug=True)

mred pmcb