V8 to v9 package conversion: alternative to Magnific Popup?

Magnific Popup is not in v9. Is it replaced with anything? How do I make a lightbox popup in v9?

I managed to use Bootstrap Modal instead:

<div id="spinner_<?php echo $bID; ?>" class="ab-ajax-file-upload-spinner modal">
    <div class="modal-dialog modal-dialog-centered">
        <div class="alert alert-danger">
            <h4><?php echo t('File upload in progress'); ?></h4>

$(document).ready(function() {
    var spinner = $('#spinner_' + bid);
    var myModal = new bootstrap.Modal(spinner, {
        keyboard: false,

My magnific popups are all working fine in v9

I had hundreds of messages in the log saying the lightbox asset was missing. So I assumed it was removed and used the Bootstrap Model instead.