Online status
Widely available since 2018-01-29
The navigator.onLine property returns a Boolean for whether the browser is connected to some network (though not necessarily the internet). The online and offline events fire when the connection state changes.
Learning resources on MDN
Browser support (view on caniuse.com)
- Chrome 2 Released on 2009-05-21
- Chrome Android 18 Released on 2012-06-27
- Edge 12 Released on 2015-07-29
- Firefox 1.5 Released on 2005-11-29
- Firefox for Android 4 Released on 2011-03-29
- Safari 4 Released on 2009-06-08
- Safari on iOS 3.2 Released on 2010-04-03
Specifications
- HTML Standard (#navigator.online), from HTML Workstream (WHATWG).
- HTML Standard (#event-online), from HTML Workstream (WHATWG).