Method constructor

packages/core/useEventSource/index.test.ts:12–17

()

  readonly CLOSED = 2 as const

  constructor() {
    super();
    (this as EventSource).addEventListener('error', this.onerror);
    (this as EventSource).addEventListener('message', this.onmessage)
    this.addEventListener('open', this.onopen)
  }

  onerror(_ev: Event) {
  }