Cacher is the code snippet organizer for pro developers

/*
 * This function be call when user connect or disconnecet with internet
 */
function updateStatus() {
	// Do something in there
} 

/*
 * Code for user is connecting with internet
 */
if (navigator.onLine) {
	// Do something in there
}

// Usage
window.addEventListener('online', updateStatus);
window.addEventListener('offline', updateStatus);