Checking if the Internet and a particular site are up in JavaScript/AJAX

Question

I have a page which runs locally on my device, and I would like to use AJAX or normal JavaScript to check if the device is connected to the Internet and if a pa

Answer 1

There is basic support for

navigator.online
//Events
window.onOnline
window.onOffline

on desktop browsers and support on Android. This might not completely answer your question, but I thought its worth sharing anyway :)