Modal Dialog Example based on Bootstrap 4

<script>
function updateTags()
{
	alert("Update completed!");
}
</script>
<button type="button" class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#tagModal">
	Update Tags
</button>
<div class="modal fade" id="tagModal" tabindex="-1" aria-labelledby="tagModalLabel" aria-hidden="true">
	<div class="modal-dialog">
		<div class="modal-content">
			<div class="modal-header">
				<h5 class="modal-title" id="tagModalLabel">Update Tags</h5>
				<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
			</div>
			<div class="modal-body">
				<textarea class="ignore-tinymce" id="new_tags" cols="80" rows="8" style="width:100%;">{$myPost['post_tags']}</textarea>
			</div>
			<div class="modal-footer">
				<button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
				<button type="button" class="btn btn-primary" onClick="javascript:updateTags();">Save changes</button>
			</div>
		</div>
	</div>
</div>