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Get a button to click another button event


I have individual sets of states and each has a button where an individual callback is triggered separately for each set, is there a way to have one button which invokes all those callbacks at once too (to be used as a ‘Save all’ mechanism’)

Have you looked at chained callbacks? That sounds like what you wanted. You can create a new callback with the n_clicks of the other buttons as the Output.

something like this for the new callback (not tested):

    Output("button1", "n_clicks"),
    Output("button2", "n_clicks"),
    Input("new-button", "n_clicks")
def new_callback(new_button_clicks):
    return [0, 0]

Note: this resets the n_clicks of the other buttons so that it will detect the changed n_clicks and trigger its respective callbacks.