I am creating a PWA that works offline with a service worker.
Right now it works correctly, but there is a problem in Lighthouse Audit.
When I run Lighthouse, in the PWA section I get this problem: start_url does not respond with a 200 when offline The start_url did respond, but not via a service worker.
How do I pass that audit, even if there are other audits that say that I have successfully installed a service worker?
My website is here: and the service worker is here: .js
Thanks in advance.
I am creating a PWA that works offline with a service worker.
Right now it works correctly, but there is a problem in Lighthouse Audit.
When I run Lighthouse, in the PWA section I get this problem: start_url does not respond with a 200 when offline The start_url did respond, but not via a service worker.
How do I pass that audit, even if there are other audits that say that I have successfully installed a service worker?
My website is here: https://nariohtools. and the service worker is here: https://nariohtools./sw.js
Thanks in advance.
Share Improve this question edited Nov 22, 2020 at 15:12 prialgon asked Nov 22, 2020 at 14:10 prialgonprialgon 431 silver badge7 bronze badges2 Answers
Reset to default 6The related code is here:
caches.open(CACHE_NAME).then((cache) => {
return fetch(evt.request)
You are opening the cache but you're not using the cached response and the request is forwarded to the network:
Use something like this instead:
caches.open(CACHE_NAME).then(cache => {
return cache.match(evt.request).then(cacheResponse => cacheResponse || fetch(evt.request).then(networkResponse => {
cache.put(evt.request, networkResponse.clone());
return networkResponse;
}));
Just in case you struggle with this, there is a bug in Lighthouse that has been fixed in Chrome version 89. https://github./antfu/vite-plugin-pwa/issues/20#issuement-773019940
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