Call the update function from the component without using a task

Question

I have an elm project with a main application and component.

I would like the component to have its own internal updates, and also be able to update the main model.

I would like the updatecomponent function to be able to run Cmd, which transfers data to the main application and changes the main URL of the application.

The only way I found this is to use Task.performand Task.succeed.

Is it possible to do this without using Task.performand Task.succeed? What are the negative aspects of patterns of use Task.performand Task.succeedin this scenario?

Answer 1

Short answer:

. . IE:

--In Parent
type alias ParentModel = {
    childModel : ChildModel
}

Type Msg 
    = ChildMsg Child.Msg

case ParentMsg parentMsg ->
    let
        ( newChildModel, childMsg ) =
            Child.update parentMsg model.childModel
    in
        ( { model | childModel = newChildModel }, Cmd.map ParentMsg childMsg )

view model =
    Html.map ParentMsg (Child.view model.childModel)
    ...

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