https://www.tele2.lv/js/footer.js?v=2

1$(function() {
2    $("footer .line_logo .flex-footer-logo .button_up").on('click', function () {
3        $("html, body").animate({ scrollTop: 0 }, "slow");
4    });
5
6    function validateEmail(email) {
7        let re = /[^\s@]+@[^\s@]+\.[^\s@]+/;
8
9        return re.test(email)
10    }
11
12    function emailField() {
13        let email_field = $("#newsletter_email_v2"),
14            email = email_field.val();
15
16        if (!validateEmail(email)) {
17            email_field.addClass("invalid");
18        }
19    }
20
21    $("#newsletter_email_v2").on("input", function() {
22        $(this).removeClass("invalid");
23    });
24
25    $("#t2_consent_email_small").on("input", function() {
26        $(this).parent().removeClass("invalid");
27    });
28
29    $("footer .line1.v2 .blocks .block .email_form .form-group .btn_2022").on("click", function() {
30        let email_field = $("#newsletter_email_v2"), email, pdata,
31            newsSubmit = $(this).closest(".email_form"),
32            newsLoading = $("#newsletter_loading_v2");
33
34        newsSubmit.hide();
35        newsLoading.show();
36
37        email_field.removeClass("invalid");
38
39        emailField();
40
41        if (email_field.hasClass("invalid")) {
42            email_field.focus();
43            newsLoading.hide();
44            newsSubmit.show();
45
46            return false
47        } else {
48            email = email_field.val();
49            pdata = {
50                "email": email
51            };
52
53            $.post("?cmd=get&cid=11391&piet_jaunumiem=1", pdata, function(data) {
54                if (data === "1") {
55                    newsLoading.hide();
56                    newsSubmit.show();
57
58                    $("footer .line1.v2 .blocks .block .email_form").hide();
59                    $("#newsletter_thanks_v2").show();
60                } else {
61                    newsLoading.hide();
62                    newsSubmit.show();
63
64                    email_field.addClass("invalid").focus();
65                }
66            });
67        }
68    });
69});