live_stash_example.ex

defmodule CounterLive do
  use ShowcaseAppWeb, :live_view
  use LiveStash

  def mount(_params, _session, socket) do
    socket
    |> LiveStash.recover_state()
    |> case do
      {:recovered, recovered_socket} -> recovered_socket
      _ -> assign(socket, count: 0)
    end
    |> then(&{:ok, &1})
  end

  def render(assigns) do
    ~H"""
    <div>
      <button phx-click="inc">+</button>
      <span>{@count}</span>
    </div>
    """
  end

  def handle_event("inc", _, socket) do
    socket
    |> assign(:count, socket.assigns.count + 1)
    |> LiveStash.stash_assigns([:count])
    |> then(&{:noreply, &1})
  end
end