Drag'n'drop on the PETAL(S) stack

page_live.ex

defmodule PetalsDragNDropWeb.PageLive do
  # ...

  @impl true
  def render(assigns) do
    ~F"""
     ...

        <GridWithDragAndDrop
          dragged="letter_dragged"
          ...
        >
         ...
    """
  end
  
  # ...
  
  @impl true
  def handle_event("letter_dragged", %{"from" => from, "to" => to}, socket) do
    to = parse_coordinates(to)
    {:noreply, update(socket, :data, fn data -> move(data, from["id"], to) end)}
  end

  ...