This is a sample application using Ionic 5 and Leaflet with Leaflet.TileLayer.MBTiles.

I made a custom npm package of Leaflet.TileLayer.MBTiles called leaflet-tilelayer-mbtiles-ts to make it compatible with mobile devices(Andoid, iOS).

npm i leaflet-tilelayer-mbtiles-ts --save

Get it running

• Clone this repository.
• Run npm install from the project root.
• If you do not install the Ionic CLI (npm install ionic -g)
• Run ionic serve in a terminal from the project root.

I was forced to create an updated npm package since fetch didn't support File URI Schema see.

If you are experiencing performance issues (mostly on old device), consider to export mbtiles to png format using mbutil and if the pngs are too big reduce png quality with pngquant

How to use it

let mb = L.tileLayer.mbTiles('assets/my.mbtiles', {
  minZoom: 0,
  maxZoom: 8
}).addTo(this.map);

mb.on('databaseloaded', (ev) => {
  console.info('MBTiles DB loaded', ev);
});
mb.on('databaseerror', (ev) => {
  console.info('MBTiles DB error', ev);
});