I have implemented the code as per https://learn.microsoft.com/en-us/azure/communication-services/concepts/voice-video-calling/user-facing-diagnostics?pivots=platform-web#network-values. Code is on my local. Now, I want to test it like if internet is off then display Network not available message on screen. However, everything is on my local, it is not triggering the event. Following is my code: