I tried to show modal using jquery, but to no avail.
I've tried to rearrange my jquery place and researching through other questions but I can't find any answer to my problem.
Here's the button
<div class="col-sm-6">
    <a onclick="addmhsForm();" href="#" class="btn btn-success" data-toggle="modal"><span>Tambah Mahasiswa</span></a>
</div>
Here's where I place my script and jquery
        <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
        <script type="text/javascript" src="{{asset('js/api.js')}}"></script>
    </body>
</html>
And here's my custom javascript
$(document).ready(function() {
    //Here's where I place ajax script
});
function addmhsForm() {
    $(document).ready(function() {
        event.preventDefault();
        $("#add-error-bag").hide();
        $('#addModal').modal('show');
    });
}
I expect the code to show the modal, alas what I find is an error message like this:
Uncaught ReferenceError: addmhsForm is not defined at HTMLAnchorElement.onclick