JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/leaflet/0.5.1/leaflet.js"></script>
<div id="map"></div>

JavaScript

var map = L.map('map').setView([6.2, 62.44], 13);

var projectionName = 'EPSG:32633';

L.tileLayer('http://opencache.statkart.no/gatekeeper/gk/gk.open_wmts?SERVICE=WMTS&REQUEST=GetTile&LAYER=norges_grunnkart&TILEMATRIXSET=' + projectionName + '&TILEMATRIX=' + projectionName + ':4&TILEROW=4&TILECOL=8&FORMAT=image/png').addTo(map);