版本：1.8.0
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/images/layers-2x.png
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/images/layers.png
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/images/marker-icon-2x.png
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/images/marker-icon.png
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/images/marker-shadow.png
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet-src.js
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet-src.min.js
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet.css
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet.js
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet.min.css
- https://cdn.bootcdn.net/ajax/libs/leaflet/1.8.0/leaflet.min.js