How to check the server for availability?

Question

JavaScript

Good day.

I am writing an application for a price checker, the principle is this, I access the server via AJAX, receive JSON and display the data on the screen. It is necessary to check the server for availability by constant polling and display a hidden block on the screen if there is no connection to the server.

Please tell me how to do it?

Answer 1

Catching "fallen" requests by timeout