var input = document.querySelector("#phone"); window.intlTelInput(input, { initialCountry: "auto", geoIpLookup: function(callback) { $.get('https://ipinfo.io', function() {}, "jsonp").always(function(resp) { var countryCode = (resp && resp.country) ? resp.country : ""; callback(countryCode); }); }, utilsScript: "../../build/js/utils.js?<%= time %>" // just for formatting/placeholders etc });