Function supportPatchXHROnProperty

packages/zone.js/test/test-util.ts:69–78

()

}

export function supportPatchXHROnProperty() {
  let desc = Object.getOwnPropertyDescriptor(XMLHttpRequest.prototype, 'onload');
  if (!desc && (window as any)['XMLHttpRequestEventTarget']) {
    desc = Object.getOwnPropertyDescriptor(global['XMLHttpRequestEventTarget'].prototype, 'onload');
  }
  if (!desc || !desc.configurable) {
    return false;
  }
  return true;
}

let supportSetErrorStack = true;