dash                 2.18.2
dash-core-components 2.0.0
dash-html-components 2.0.0
dash-table           5.0.0

from dash import Dash, Output, Input, html, set_props, DiskcacheManager
import diskcache
import dash

cache = diskcache.Cache("./cache")
background_callback_manager = DiskcacheManager(cache)

app = Dash()

app.layout = [
    html.Button("start", id="start"),
    html.Div("initial", id="output"),
    html.Div("initial 2", id="output-2"),
]

@app.callback(
    Input("start", "n_clicks"),
    background=True,
    running=[
        (Output("start", "disabled"), True, False)
    ],
    manager=background_callback_manager,
)
def on_click(_):
    set_props("output", {"children": "changed"})
    set_props("output-2", {"style": {"background": "red"}})

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