liveview example

counter.ex

defmodule HanxinWeb.CounterLive do
  use HanxinWeb, :live_view

  def mount(_params, _session, socket) do
    {:ok, assign(socket, hello: :world, count: 0)}
  end

  def render(assigns) do
    ~L"""
    <H1>Hello <%= assigns.hello %></H1>
    <p>
      count: <%= assigns.count %>
      <div>
        <button phx-click="+">+</button>
        <button phx-click="-">-</button>
      </div>
    </p>

    """
  end

  def handle_event("+", _, socket) do
    {:noreply, assign(socket, count: socket.assigns.count + 1)}
  end

  def handle_event("-", _, socket) do
    {:noreply, assign(socket, count: socket.assigns.count - 1)}
  end
end