L.TileLayer.WMTS is a Leaflet.js plugin for creating WMTS Tile layers. It is a simple wrapper over L.TileLayer.
let options = {
tileMatrixSet:'g',
layer:'bluemarble_3857',
};
let wmtsLayer = L.tileLayer.wmts(url, options);
See the demo page.
This plugin is licensed under the Beerware License, see LICENSE.md