How to show network traffic in browser?

I have a project and I want to make a simple debug application in Istio. So I want to make a simple webpage which can display the network traffic in realtime.

For example I send traffic to my application and the webpage show network traffic like tcpdump.

So the question is what kind of language need me to perform this? And there is somewhere an example about if somebody display anything like that.

Thanks a lot!