https://thefederalist.com/wp-content/plugins/memberpress/js/login.js

1(function($) {
2  __ = wp.i18n.__;
3
4  function resetToggle( $button, show ) {
5    $button
6      .attr({
7        'aria-label': show ? __( 'Show password' ) : __( 'Hide password' )
8      })
9      .find( '.text' )
10        .text( show ? __( 'Show' ) : __( 'Hide' ) )
11      .end()
12      .find( '.dashicons' )
13        .removeClass( show ? 'dashicons-hidden' : 'dashicons-visibility' )
14        .addClass( show ? 'dashicons-visibility' : 'dashicons-hidden' );
15  }
16
17  $(document).ready( function() {
18    $('body').on('click', 'button.mp-hide-pw', function () {
19      var $button = $(this),
20        $pass = $button.siblings('#user_pass');
21
22      // Detect alternative password field if the default one is not found.
23      if( ! $pass.length ){
24        $pass = $button.parent('div.mp-hide-pw').find('input');
25      }
26
27      // Bailout if the password field is not found.
28      if( ! $pass.length ){
29        return;
30      }
31
32      if ( 'password' === $pass.attr( 'type' ) ) {
33        $pass.attr( 'type', 'text' );
34        resetToggle( $button, false );
35      } else {
36        $pass.attr( 'type', 'password' );
37        resetToggle( $button, true );
38      }
39    });
40
41    // Pro Template
42    if( $('#mepro-login-hero').length ){
43      if( $('#mepr_loginform').length ){
44        $("#user_login, #user_pass").on("input", function(){
45          if ( $('#user_login').val().length > 0 && $('#user_pass').val().length > 0) {
46            $('#wp-submit').removeClass('disabled');
47          }
48        })
49      }
50    }
51
52    // Handle form labels
53    const $usernameInput = $('#user_login');
54    const $passwordInput = $('#user_pass');
55    const $usernameLabel = $usernameInput.closest('.mp-form-row').find('label');
56    const $passwordLabel = $passwordInput.closest('.mp-form-row').find('label');
57
58    handleFormLabels(null, $usernameInput, $usernameLabel);
59    handleFormLabels(null, $passwordInput, $passwordLabel);
60
61    $usernameInput.on('keyup', function(event) {
62      handleFormLabels(event, $usernameInput, $usernameLabel);
63    });
64    $passwordInput.on('keyup', function(event) {
65      handleFormLabels(event, $passwordInput, $passwordLabel);
66    });
67
68    function handleFormLabels(event, input, label) {
69      if (input.val() === '') {
70        label.removeClass('active');
71      } else {
72        label.addClass('active');
73      }
74    }
75    // End Pro Template
76  });
77})(jQuery);