Function func

src/client/entry/worker.js:26–32

(evt)

  ws.id = id
  ws.once = (callack, id) => {
    const func = (evt) => {
      const arg = JSON.parse(evt.data)
      if (id === arg.id) {
        callack(arg)
        ws.removeEventListener('message', func)
      }
    }
    ws.addEventListener('message', func)
  }
  ws.onclose = () => {