What is the best technology for an unkillable Chrome-based terminal HTML shell?

Question

Google Chrome

Hello everyone,
we are choosing a technology for creating a payment terminal shell. In general, it is clear that this will be HTML in the Chrome browser (in kiosk mode). It can't just be HTML from the server. if there is no connection, the browser will show us its service page. It is required to make sure that in the absence of communication with the server, the browser shows our alert and blocks work with the shell until the connection is restored. What is the best way to do this?
1. Write all navigation in AJAX.
2. Manage navigation from the Chrome app.
3. Anything else?

Answer 1

Alternatively, Awesomeum.
Another option is a local proxy that caches the HTML for an arbitrary amount of time.

Answer 2

https://github.com/nwjs/nw.js/tree/master There is a kiosk
mode and a server in the set