<script src=" https://cdn.jsdelivr.net/npm/leaflet-label@0.2.1-0/dist/leaflet.label.min.js "></script>
<link href=" https://cdn.jsdelivr.net/npm/leaflet-label@0.2.1-0/dist/leaflet.label.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.