Clientside_callback use graph's extendData with multiple traces

Hi,

I’m running a live graph that updates a trace every 100ms via a combination of a dcc.Store and and different dcc.interval(s). I would like to have multiple traces in my graph, but I’m not able to get the right ‘extendData return’ in the javascript callback.

I’m currently returning this for a single trace and that works fine. Does anyone know how to modify the return line in order to work with multiple traces?

app.clientside_callback(
    """
    function (...) {
        return [[{x: [data.x.slice(offset, end)], y: [data.y.slice(offset, end)]}, [0], 250], end, data.x[offset], value_first];
    }
    """,
    [
        Output("graph", "extendData"), # dcc.graph item
        Output("offset", "data"), # dcc.Store items below
        Output("time-offset", "data"),
        Output("first-value", "data"),
    ],
)

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