How to show a warning message in html ? if internet connection is unavailable

Question

if no data connection how a pop up message show with internet warning ⚠? please give me some example to understand.

Answer 1

something similar....
https://code.sololearn.com/W0v6sOTgl3jN/?ref=app

Answer 2

I guess your browser can do it itself. If you have no internet, then you get a page... something like "Aww Snap ! No internet connection" on Chrome and similar on other browsers.