How to catch net::ERR_CONNECTION_REFUSED

Question

Is there a way to catch failed to load resource: net::ERR_CONNECTION_REFUSED, I\'ve tried:

try {
  $.post(\'\',{},function(res) {
  }).fail(fun         


        

Answer 1

You have access to online/offline in chrome.

var _Network_state = true;
    function updateIndicator() {
        // Show a different icon based on offline/online
        if (navigator.onLine) { // true|false
            // ... do other stuff
            _Network_state = true;
        } else {
            // ... do other stuff
            _Network_state = false;
        }
        console.info(_Network_state ? 'Online' : 'Offline');
    }
    // Update the online status icon based on connectivity
    window.addEventListener('online',  updateIndicator);
    window.addEventListener('offline', updateIndicator);
    updateIndicator();

Before call ajax, inspect "_Network_state"