| CONSOLE MESSAGE: FetchEvent.respondWith received an error: Returned response is null. | |
| CONSOLE MESSAGE: XMLHttpRequest cannot load https://localhost:9443/service-workers/service-worker/resources/fetch-event-respond-with-argument-iframe.html?other-value. | |
| PASS respondWith() takes either a Response or a promise that resolves with a Response. Other values should raise a network error. | |