LiveView and date_select builder - warnings

Questions / Help
1

I have a function that generates a date_picker, after upgrading to live_view 0.18.3, I am getting warnings, about assigning variable b outside of my ~H sigil.
This is the function, can anyone tell me how best to rewrite it?

  def date_picker(form, field, opts \\ []) do
    {myself, opts} = Keyword.pop(opts, :myself)
    assigns = %{myself: myself}

    builder = fn b ->
      ~H"""
      <div class="flex">
        <%= b.(:year,
          options: 2008..2099,
          class:
            "mt-1 mr-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md",
          phx_keydown: "stop_edit",
          phx_key: "escape",
          phx_hook: "AutoFocus",
          phx_target: @myself
        ) %>
        <%= b.(:month,
          class:
            "mt-1 mr-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md",
          phx_keydown: "stop_edit",
          phx_key: "escape",
          phx_target: @myself
        ) %>
        <%= b.(:day,
          class:
            "mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md",
          phx_keydown: "stop_edit",
          phx_key: "escape",
          phx_target: @myself
        ) %>
      </div>
      """
    end

    date_select(form, field, [builder: builder] ++ opts)
  end
2

You can put b into the assigns.

builder = fn b ->
  assigns = %{b: b, myself: myself}
  ~H"""
  … <%= @b.(…) %>
  """
end
3

Yes, I did it that way. Thx