How to fix net::ERR_NAME_NOT_RESOLVED in ajax GET?

Question

I have a simple JS program that works with JQuery Ajax to ping a website and return the status code:

$.get("https://dev.tylernodes.com", function(data) {
                console.log(data);
            }).done(function() {
               // TO DO ON DONE
            }).fail(function(data, textStatus, xhr) {
                 //This shows status code eg. 403
                 console.log("error", data.status);
                 //This shows status message eg. Forbidden
                 console.log("STATUS: "+xhr);
            }).always(function() {
                 //TO-DO after fail/done request.
                 console.log("ended");
            });

Whenever I use this though, I get an error: net::ERR_NAME_NOT_RESOLVED

I was wondering how would I fix this for the long term?