History of CacheStorage.has() Revision history for: English (US) Sep 15, 2016, 2:31:28 AM tarjei This is how this works in Chrome and Firefox. Test with this simeple line: caches.has('https://www.example.com/test/me').then((r) => {console.log('rr', r)}).catch(cv => {console.log('cv', cv)}) Previous Mar 17, 2016, 9:20:41 AM chrisdavidmills Previous Dec 2, 2015, 3:49:28 AM chrisdavidmills Previous Jul 8, 2015, 1:22:56 PM chrisdavidmills Previous Jun 5, 2015, 1:42:02 PM jpmedley Previous Apr 17, 2015, 1:47:00 PM jpmedley Previous Apr 17, 2015, 1:23:10 PM jpmedley Previous Apr 17, 2015, 1:22:48 PM jpmedley Previous Mar 25, 2015, 4:44:49 AM chrisdavidmills Previous Mar 19, 2015, 3:45:03 PM kscarfone Editorial review