原文
# Update server state from browser events
defmodule MyAppWeb.CounterLive do
use MyAppWeb, :live_view
def mount(_params, _session, socket) do
{:ok, assign(socket, count: 0)}
end
def handle_event("increment", _, socket) do
{:noreply, update(socket, :count, &(&1 + 1))}
end
end