Able to install ServiceWorker even when system is offline.

[DexterWoo]

we recently are working on an app.
it's composed of webview2 + a PWA app.
we would like to preload the PWA with WebResourceRequested event.
however, it will not work when the system is offline.
it would be nice to be able to preload the PWA even when the system is offline.

Ideally, we would like to have something like this.

App 1st launch, in WebResourceRequested we'll provide the first version of the PWA app.
the following version updates will be handled by ServiceWorker's logic.

AB#40545851

[victorthoang]

Thanks for the feedback! We've added this as a scenario on our backlog!

[aluhrs13]

@DexterWoo - Can you expand on where the PWA files are located if the devices is offline? If the files are all local you could look at using SetVirtualHostNameToFolderMapping to make them available to the WV2.

[DexterWoo]

we are thinking about everything being served by the service-worker instead, SetVirtualHostNameToFolderMapping is not quite a good option for us cause it will diverge into 2 split flows.

[aluhrs13]

What would the two flows be? You could use SetVirtualHostNameToFolderMapping in the 1st launch case just like you were expecting to use WebResourceRequested.

[DexterWoo]

What would the two flows be? You could use SetVirtualHostNameToFolderMapping in the 1st launch case just like you were expecting to use WebResourceRequested.

we would need to detect if the service-worker was installed success fully and diverge into 2 flows.

if(!swinstalled)
{
SetVirtualHostNameToFolderMapping(xxx);
}
else
{
WebResourceRequested();// add additional headers into the requests
}

[aluhrs13]

@DexterWoo - We've added an API AddWebResourceRequestedFilterWithRequestSourceKinds method that allows you to pass a COREWEBVIEW2_WEB_RESOURCE_REQUEST_SOURCE_KINDS of COREWEBVIEW2_WEB_RESOURCE_REQUEST_SOURCE_KINDS_SERVICE_WORKER to intercept requests from the service worker.

https://learn.microsoft.com/en-us/microsoft-edge/webview2/release-notes?tabs=win32cpp#experimental-features-8

Let me know if this doesn't meet your need and why, otherwise I'll close this in ~7 days.