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HTML

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Bootstrap 5 Password Toggle with Validation</title>

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" rel="stylesheet">

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css">

</head>

<div class="text-center mb-4">
            <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addUserModal">
                Add User
            </button>
        </div>

<div class="modal fade" id="addUserModal" tabindex="-1" aria-labelledby="addUserModalLabel" aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <h5 class="modal-title" id="addUserModalLabel">Add User</h5>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
                    </div>
                    <form id="addUserForm" novalidate>
                        <div class="modal-body">
                            <p class="text-danger">All star(*) marked fields are mandatory</p>
                            <div id="alertContainer"></div>

<div class="mb-3">
                                <label for="userFirstname" class="form-label">First Name <b class="text-danger">*</b></label>
                                <input type="text" class="form-control" placeholder="First Name" id="userFirstname" required>
                                <div class="invalid-feedback">
                                    First Name is required.
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userLastname" class="form-label">Last Name <b class="text-danger">*</b></label>
                                <input type="text" class="form-control" placeholder="Last Name" id="userLastname" required>
                                <div class="invalid-feedback">
                                    Last Name is required.
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userUsername" class="form-label">Username <b class="text-danger">*</b></label>
                                <input type="text" class="form-control" placeholder="Username" id="userUsername" required>
                                <div class="invalid-feedback">
                                    Username is required.
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userEmail" class="form-label">Email <b class="text-danger">*</b></label>
                                <input type="email" class="form-control" placeholder="Email" id="userEmail" required>
                                <div class="invalid-feedback">
                                    Please enter a valid email address.
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userContact">Contact <b class="text-danger">*</b></label>
                                <div class="input-group">
                                    <span class="input-group-text">+91</span>
                                    <input type="text" class="form-control" placeholder="Enter your 10-digit number" id="userContact" maxlength="10" pattern="\d{10}" required>
                                    <div class="invalid-feedback">
                                        Please enter a valid 10-digit contact number.
                                    </div>
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userPassword" class="form-label">Password <b class="text-danger">*</b></label>
                                <div class="input-group">
                                    <input type="password" class="form-control" placeholder="Password" id="userPassword" pattern=".{8,}" required>
                                    <span class="input-group-text" onclick="togglePassword()">
                                        <i class="fa fa-eye" id="toggleEye"></i>
                                    </span>
                                    <div class="invalid-feedback">
                                        Password must be at least 8 characters long.
                                    </div>
                                </div>
                            </div>

<div class="mb-3">
                                <label for="userRole">Role <b class="text-danger">*</b></label>
                                <select class="form-select" id="userRole" required>
                                    <option value="" disabled selected>Select Role</option>
                                    <option>Admin</option>
                                    <option>Editor</option>
                                    <option>Viewer</option>
                                </select>
                                <div class="invalid-feedback">
                                    Please select a role.
                                </div>
                            </div>
                        </div>
                        <div class="modal-footer">
                            <button type="submit" class="btn btn-primary">Add User</button>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js"></script>

</body>

</html>

CSS

JS

function togglePassword() {
            const passwordField = document.getElementById("userPassword");
            const toggleEye = document.getElementById("toggleEye");

if (passwordField.type === "password") {
                passwordField.type = "text";
                toggleEye.classList.remove("fa-eye");
                toggleEye.classList.add("fa-eye-slash");
            } else {
                passwordField.type = "password";
                toggleEye.classList.remove("fa-eye-slash");
                toggleEye.classList.add("fa-eye");
            }
        }

// Custom form validation
        (function () {
            'use strict'

const forms = document.querySelectorAll('.needs-validation')

Array.prototype.slice.call(forms)
                .forEach(function (form) {
                    form.addEventListener('submit', function (event) {
                        if (!form.checkValidity()) {
                            event.preventDefault()
                            event.stopPropagation()
                        }

form.classList.add('was-validated')
                    }, false)
                })
        })();

// Form validation using Bootstrap 5
        document.getElementById('addUserForm').addEventListener('submit', function (event) {
            event.preventDefault(); // Prevent form submission

// Check if form is valid
            if (!this.checkValidity()) {
                event.stopPropagation();
                this.classList.add('was-validated');
            } else {
                alert('User added successfully!');
                // You can add code here to send data to the server or further process the form
                this.reset(); // Reset the form
                this.classList.remove('was-validated');
            }
        });

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