SwProblem

It is better to run this example in a incognito window (because of the service worker).

Issue only with the serviceWorker in Chrome

The first time the application runs (no from service worker), 'Result' shows: https://httpbin.org/get'
After reload (from service worker), 'Result' shows: 'https://httpbin.org/redirect-to?url=https://httpbin.org/get'

Result:

Code executed on the window


      var url = 'https://httpbin.org/redirect-to?url=https://httpbin.org/get';

      var xhr = new XMLHttpRequest();

      xhr.open('GET', url);

      xhr.addEventListener('load', () => {

      document.getElementById('result').textContent = xhr.responseURL;

      });

      xhr.send();

Possible explanation

It seems that `event.respondWith()` ignores the URL for requests if they are resolved through a redirect (status 30*)