How to send an event from within `handle_event` in a Phoenix LiveView

live_view_send_event.ex

def send_event(socket, component \\ nil, event, payload) do
  cid = case component do
    %Phoenix.LiveComponent.CID{cid: cid} -> cid
    _ -> nil
  end

  send(
    socket.root_pid,
    %Phoenix.Socket.Message{
      event: "event",
      join_ref: nil,
      payload: %{
        "cid" => cid,
        "event" => event,
        "type" => "other",
        "value" => payload
      },
      ref: nil,
      topic: "lv:" <> socket.id
    }
  )
end