Try to use Service worker in my Angular7 app. ServiceWorker compiled by ServiceWorkerModule. This issue was reproduced only if I use a service worker. I can not understand why SW initiate auth POST request without sending pre-flight OPTIONS req. May be anybody can help with this issue? requests without WS:

service worker fail NTLM auth with 504 error

Try to use Service worker in my Angular7 app. ServiceWorker compiled by ServiceWorkerModule.

This issue was reproduced only if I use a service worker.

POST req without pre-flight OPTIONS req init by SW

fetched req by service-worker

I can not understand why SW initiate auth POST request without sending pre-flight OPTIONS req. May be anybody can help with this issue?

requests without WS:

OPTIONS req

POST req