new Intl Phn

by John Doe

HTML

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
  <script type="text/javascript" src="//code.jquery.com/jquery-2.1.3.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/6.4.1/css/intlTelInput.css">
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/6.4.1/js/intlTelInput.min.js"></script>
</head>
<body>
<input id="phone" type="tel">
<span id="valid-msg" class="hide">✓ Valid</span>
<span id="error-msg" class="hide">Invalid number</span>
</body>
</html>

CSS

.hide {
    display: none;
}

JavaScript

$("#phone").intlTelInput({
  initialCountry: "auto",
  geoIpLookup: function(callback) {
    $.get('https://ipinfo.io', function() {}, "jsonp").always(function(resp) {
      var countryCode = (resp && resp.country) ? resp.country : "";
      callback(countryCode);
    });
  },
utilsScript:"https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/11.0.4/js/utils.js"
});

var telInput = $("#phone"),
  errorMsg = $("#error-msg"),
  validMsg = $("#valid-msg");

// initialise plugin
telInput.intlTelInput({  
utilsScript:"https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/11.0.4/js/utils.js"
});

var reset = function() {
  telInput.removeClass("error");
  errorMsg.addClass("hide");
  validMsg.addClass("hide");
};

// on blur: validate
telInput.blur(function() {
  reset();
  if ($.trim(telInput.val())) {
    if (telInput.intlTelInput("isValidNumber")) {
      validMsg.removeClass("hide");
      var getCode = telInput.intlTelInput('getSelectedCountryData').dialCode;
       alert(getCode);
    } else {
      telInput.addClass("error");
      errorMsg.removeClass("hide");
    }
  }
});

// on keyup / change flag: reset
telInput.on("keyup change", reset);