Comment by mlllmmlml on How do I display a message in a PWA when I'm offline?

I did the first solution and it works. Here is my HTML file pastebin.com/jKYy9PLg and here is my JS file pastebin.com/LBypszjB But I am not familiar with PWAs. Currently the Toasts appears even if the PWA is not installed. I want the Toasts to only appear in the realtime PWA. All files are cached, 'it's a small 6MB website).