<script src=" https://cdn.jsdelivr.net/npm/@react-spectrum/theme-default@3.5.19/dist/main.min.js "></script>
<link href=" https://cdn.jsdelivr.net/npm/@react-spectrum/theme-default@3.5.19/dist/theme-default.6c535ac4.min.css " rel="stylesheet">
No default CSS file set by the package author so the URL is guessed. You can always browse all package files to use another one.