Server-Sent Events

Mochi.sse() creates SSE streams. The handler receives a stream with send(), close(), and onClose():

"/sse/time": Mochi.sse((stream) => {
  stream.send(new Date().toISOString());
  const interval = setInterval(() => {
    stream.send(new Date().toISOString());
  }, 1000);
  stream.onClose(() => clearInterval(interval));
}),

send() accepts an optional second argument with event and id fields for named events.