Method emit

tests/browser/progress.browser.test.js:63–66

(type, target = 'request', event = {})

  }

  emit(type, target = 'request', event = {}) {
    const listeners = target === 'upload' ? this._uploadListeners : this._listeners;
    (listeners[type] || []).forEach((listener) => listener(event));
  }

  respondWith({
    status = 200,