templates/register.html

{% extends 'base.html' %}

{% block title %}Register{% endblock %}

{% block content %}
<div class="container">
    <h2 class="center-text">Register</h2>
    <form method="POST" id="registrationForm">
        <div class="mb-3">
            <label for="email" class="form-label">Email:</label>
            <input type="email" class="form-control" id="email" autocomplete="off" name="email" required>
            <small id="emailHelp" class="form-text text-muted">Your email here. Example: example@domain.com</small>
        </div>
        <div class="mb-3">
            <label for="nickname" class="form-label">Nickname:</label>
            <input type="text" class="form-control" id="nickname" autocomplete="off" name="nickname" required>
            <small id="nicknameHelp" class="form-text text-muted">Your nickname here. Example: Nickname1</small>
        </div>
        <div class="mb-3">
            <label for="password" class="form-label">Password:</label>
            <input type="password" class="form-control" id="password" autocomplete="off" name="password" required>
            <small id="passwordHelp" class="form-text text-muted">Your password should be more than 8 symbols.</small>
        </div>
        <div class="mb-3">
            <label for="repeatPassword" class="form-label">Repeat Password:</label>
            <input type="password" class="form-control" id="repeatPassword" autocomplete="off" name="repeatPassword" required>
        </div>
        <input type="hidden" id="message" value="{{ message }}">
        <div class="btn-center">
            <button type="submit" class="btn btn-primary">Register</button>
        </div>
    </form>

    <!-- Registration Alert Modal -->
    <div class="modal fade" id="registrationAlertModal" tabindex="-1" role="dialog" aria-labelledby="registrationModalLabel" aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="registrationModalLabel">Registration Alert</h5>
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    <!-- Message will be inserted here via JavaScript -->
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">OK</button>
                </div>
            </div>
        </div>
    </div>
</div>
{% endblock %}
{% block extra_scripts %}
<script>
    $(document).ready(function() {
        // Show message if provided
        var message = $('#message').val();
        if (message) {
            $('#registrationAlertModal .modal-body').text(message);
            $('#registrationAlertModal').modal('show');
        }

        // Validate passwords before submission
        $('#registrationForm').on('submit', function(e) {
            var password = $('#password').val();
            var repeatPassword = $('#repeatPassword').val();
            if (password !== repeatPassword) {
                e.preventDefault(); // Prevent form submission
                $('#registrationAlertModal .modal-body').text('Passwords do not match!');
                $('#registrationAlertModal').modal('show');
            }
        });
    });
</script>
{% endblock %}