Online statusThe navigator.onLine property is 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.widely2015-07-292018-01-29https://html.spec.whatwg.org/multipage/system-state.html#navigator.onlinehttps://html.spec.whatwg.org/multipage/indices.html#event-onlineonline-statushttps://developer.mozilla.org/docs/Web/API/Navigator/onLineapi.Navigator.onLineapi.Window.offline_eventapi.Window.online_eventapi.WorkerGlobalScope.offline_eventapi.WorkerGlobalScope.online_eventapi.WorkerNavigator.onLinehttps://nowyoucanuse.com/features--online.html