Function supportsOnEvents

packages/zone.js/test/browser/HTMLImports.spec.ts:36–40

()

    });

    function supportsOnEvents() {
      const link = document.createElement('link');
      const linkPropDesc = Object.getOwnPropertyDescriptor(link, 'onerror');
      return !(linkPropDesc && linkPropDesc.value === null);
    }
    (<any>supportsOnEvents).message = 'Supports HTMLLinkElement#onxxx patching';

    ifEnvSupports(supportsOnEvents, function () {