<!-- JavaScript -->
https://cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/alertify.min.js
<!-- CSS -->
https://cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/css/alertify.min.css
<!-- Default theme -->
https://cdn.jsdelivr.net/npm/alertifyjs@1.13.1/build/css/themes/default.min.css