https://hidur.co.il/js/public.countryselect.js

1/*
2** nopCommerce country select js functions
3*/
4+function ($) {
5    'use strict';
6    if ('undefined' == typeof (jQuery)) {
7        throw new Error('jQuery JS required');
8    }
9    function countrySelectHandler() {
10        var $this = $(this);
11        var selectedItem = $this.val();
12        var stateProvince = $($this.data('stateprovince'));
13
14        if(stateProvince.length == 0)
15          return;
16
17        var loading = $($this.data('loading'));
18        loading.show();
19        $.ajax({
20            cache: false,
21            type: "GET",
22            url: $this.data('url'),
23            data: { 
24              'countryId': selectedItem,
25              'addSelectStateItem': "true" 
26            },
27            success: function (data, textStatus, jqXHR) {
28                stateProvince.html('');
29                $.each(data,
30                    function (id, option) {
31                        stateProvince.append($('<option></option>').val(option.id).html(option.name));
32                    });
33            },
34            error: function (jqXHR, textStatus, errorThrown) {
35                alert('Failed to retrieve states.');
36            },
37            complete: function(jqXHR, textStatus) {
38              var stateId = (typeof Billing !== "undefined") ? Billing.selectedStateId : (typeof CheckoutBilling !== "undefined") ? CheckoutBilling.selectedStateId : 0;
39              $('#' + stateProvince[0].id + ' option[value=' + stateId + ']').prop('selected', true);
40
41              loading.hide();
42            }
43        });
44    }
45    if ($(document).has('[data-trigger="country-select"]')) {
46        $('select[data-trigger="country-select"]').change(countrySelectHandler);
47    }
48    $.fn.countrySelect = function () {
49        this.each(function () {
50            $(this).change(countrySelectHandler);
51        });
52    }
53}(jQuery);