Example web map for Yangon using Protomaps and the pmtiles tool to download a map extract for offline usage.
https://wipfli.github.io/yangon/
Get the pmtiles tool, see https://docs.protomaps.com/pmtiles/cli.
Download a map extract for Yangon:
pmtiles extract https://demo-bucket.protomaps.com/v4.pmtiles yangon-protomaps-extract.pmtiles --region bounding-box.geojson
This creates a file called yangon-protomaps-extract.pmtiles (10 MB).
Fonts and sprites are loaded from https://protomaps.github.io/basemaps-assets/. You can download all fonts and sprites at https://github.com/protomaps/basemaps-assets.
The MapLibre GL JS JavaScript library and the pmtiles MapLibre plugin are loaded from UNPKG.