How to check if the user is online using javascript or any library?

Question

I need some help on how I could check the internet connection using Javascript or jQuery or any library if available. cause i\'m developing an offline appl

Answer 1

navigator.onLine is a property that maintains a true/false value (true for online, false for offline). This property is updated whenever the user switches into "Offline Mode".

window.addEventListener('load', function() {

  function updateOnlineStatus(event) {
     document.body.setAttribute("data-online", navigator.onLine);
  }
  updateOnlineStatus();
  window.addEventListener('online',  updateOnlineStatus);
  window.addEventListener('offline', updateOnlineStatus);
});