To implement password change validation using jQuery in Laravel, you can follow these steps. Here’s a basic example:

put below code in blade page

<form method="post" id="sample_form"
    class="form-horizontal" enctype="multipart/form-data"
    onsubmit="return check()">
    @csrf
    <div class="form-group" id="name_form">
        <label class="control-label">Name: </label>
        <input type="text" name="name"
            id="name" class="form-control" />
    </div>
    <!-- password show and hide open -->
    <div class="form-group" id="name_form">
        <label>Password</label>
        <div class="input-group" id="show_hide_password">
            <input class="form-control input-group-addon"
                type="password" name="password"
                id="password_user">
            <div class="input-group-addon">
                <a href=""><button
                        class="btn btn-light border"><i
                            class="fa fa-eye-slash"
                            aria-hidden="true"></i></button></a>
            </div>
        </div>
    </div>
    <!-- password show and hide close -->
    <!--cornfirm password show and hide open -->
    <div class="form-group" id="name_form">
        <label>Confirm Password</label>
        <div class="input-group">
            <input class="form-control" type="password"
                name="password" id="confirm_password">
        </div>
        <span id='message'></span>
    </div>
    <!-- cornfirm password show and hide close -->
    <input type="hidden" value="{{ Auth::user()->id }}"
        name="admin_id" id="admin_id" />
    <input type="hidden"
        value="{{ Auth::user()->email }}"
        name="admin_email" id="admin_email" />
    <!-- for account admin below value fo id and email will be null but when manager or user will store it it will get value by auth -->
    <input type="hidden"
        value="{{ Auth::user()->email }}" name="email">
    <input type="hidden" value="{{ date('d-m-y') }}"
        name="daymonth">
    <input type="hidden" value="null" name="user_id"
        id="user_id">
    <input type="hidden" value="null"
        name="user_email" id="user_email">
    <input type="hidden" value="" name="slugname">
    <input type="hidden" value="" name="slug_id">
</div>
<div class="form-group text-center">
<input type="hidden" name="action" id="action" />
<input type="hidden" name="hidden_id" id="hidden_id" />
<input type="submit" name="action_button"
    id="action_button"
    class="btn btn-warning float-center" value="Add" />
</div>
</form>

put below code in script tag

 <script>
    $('#confirm_password').on('keyup', function() {
        if ($(this).val() == $('#password_user').val()) {
            $('#message').html('Password matched').css('color', 'green');
        } else $('#message').html('Password not matching').css('color', 'red');
    });
    </script>

Next go to update function and put below code

$('#sample_form').on('submit', function(event) {
    event.preventDefault();
    // Check if passwords match
    if ($('#confirm_password').val() != $('#password_user').val()) {
        // Display an error message or take appropriate action
        $('#message').html('Password not matching').css('color', 'red');
        return;
    }
    // data add working on submit button
    // update button wotking for updata data
    if ($('#action').val() == "Update") {
        console.log('update button pe click ho rha hai');
        $.ajax({
            url: "{{ url('viewprofile/update') }}",
            type: "POST",
            data: new FormData(this),
            contentType: false,
            cache: false,
            processData: false,
            dataType: "json",
            headers: {
                "Authorization": "Bearer " + localStorage.getItem('a_u_a_b_t')
            },
            // message alert open
            success: function(data) {
                var html = '';
                if (data.success) {
                    html = '<div class="alert alert-success">' + data.message +
                        '</div>';
                    $('#form_result').html(html);
                    setTimeout(function() {
                        $('#user_formModal').modal('hide');
                        location.reload(true);
                    }, 2000);
                } else {
                    html = '<div class="alert alert-danger">' + data.message +
                        '</div>';
                    $('#form_result').html(html);
                }
                // adding alert messages for success and exist data validation close
            },
            // message alert close
            error: function(data) {
                console.log('Error:', data);
                //    this function for hide with id #formModel
                console.log('update function kamm nahi kr rha hai');
            }
        });
    }
});

Now update working successfully.