https://www.scienceguide.nl/wp-content/plugins/leaky-paywall/js/leaky-paywall-validate.js?ver=5.1.8

1(function ($) {
2  $(document).ready(function () {
3    var emailValid = false;
4    var userValid = false;
5    var passwordsMatch = true;
6
7    var email = $("#email_address");
8    var username = $("#username");
9    var passwordField = $("#password");
10    var passwordConfirmField = $("#confirm_password");
11
12    passwordField.focus(function () {
13      passwordsMatch = false;
14      $(".password-error").remove();
15
16      setSubmitBtnActive();
17    });
18
19    passwordConfirmField.focus(function () {
20      passwordsMatch = false;
21      $(".password-error").remove();
22
23      setSubmitBtnActive();
24    });
25
26    passwordField.blur(function () {
27      passwordsMatch = validatePasswords();
28      setSubmitBtnActive();
29    });
30
31    passwordConfirmField.blur(function () {
32      passwordsMatch = validatePasswords();
33      setSubmitBtnActive();
34    });
35
36    email.focus(function () {
37      emailValid = false;
38      $(".email-error").remove();
39
40      setSubmitBtnActive();
41    });
42
43    email.blur(function () {
44      var data = {
45        action: "leaky_paywall_validate_registration",
46        email: email.val(),
47        nonce: leaky_paywall_validate_ajax.register_nonce
48      };
49
50      $.post(leaky_paywall_validate_ajax.ajaxurl, data, function (resp) {
51        if (resp.status == "error") {
52          $(
53            '<p class="leaky-paywall-input-error email-error">' +
54              resp.message +
55              "</p>"
56          ).insertAfter("#email_address");
57          emailValid = false;
58        } else {
59          emailValid = true;
60        }
61
62        setSubmitBtnActive();
63      });
64    });
65
66    if (username.length > 0) {
67      // username
68      username.focus(function () {
69        userValid = false;
70        $(".username-error").remove();
71
72        setSubmitBtnActive();
73      });
74
75      username.blur(function () {
76        var data = {
77          action: "leaky_paywall_validate_registration",
78          username: username.val(),
79          nonce: leaky_paywall_validate_ajax.register_nonce
80        };
81
82        $.post(leaky_paywall_validate_ajax.ajaxurl, data, function (resp) {
83          if (resp.status == "error") {
84            $(
85              '<p class="leaky-paywall-input-error username-error">' +
86                resp.message +
87                "</p>"
88            ).insertAfter("#username");
89            userValid = false;
90          } else {
91            userValid = true;
92          }
93          setSubmitBtnActive();
94        });
95      });
96    } else {
97      // email is the username
98      userValid = true;
99    }
100
101    function validatePasswords() {
102      var pwMatch =
103        !passwordField.val() ||
104        !passwordConfirmField.val() ||
105        passwordField.val() === passwordConfirmField.val();
106      passwordsMatch = pwMatch;
107      if (pwMatch) {
108        $(".password-error").remove();
109      } else {
110        if (passwordField.val() && passwordConfirmField.val()) {
111          $(
112            '<p class="leaky-paywall-input-error password-error">' +
113              leaky_paywall_validate_ajax.password_text +
114              "</p>"
115          ).insertAfter(passwordConfirmField);
116        }
117      }
118      return pwMatch;
119    }
120
121    function setSubmitBtnActive() {
122      if (userValid && emailValid && passwordsMatch) {
123        $("#leaky-paywall-submit").prop("disabled", false);
124        $("#leaky-paywall-registration-next").prop("disabled", false);
125      } else {
126        // $("#leaky-paywall-submit").prop("disabled", true);
127        // $("#leaky-paywall-registration-next").prop("disabled", true);
128      }
129    }
130  });
131})(jQuery);