Add more information for Events.onInput in elm

events_input.elm

{-| Suppose that you have many inputs for list of users (first_name, last_name)
To handle event onInput for inputs for each elements, it needs to bind Event.onInput for 
inputs but Event.onInput support pass one string value. To customize that it's able to 
include more information, for example user id, we can declare the Message as below:
-}

type Msg 
    = UpdateFirstName Int String
    
-- View    
Html.input [Events.onInput (UpdateFirstName user.id) ] []

-- Reference: https://package.elm-lang.org/packages/elm/html/latest/Html-Events#onInput