text: const mapboxgl = require('mapbox-gl/dist/mapbox-gl.js');
  
  mapboxgl.accessToken = 'pk.eyJ1Ijoia2FybGdyb252YWxkdCIsImEiOiJjazg2M3JueDUwM3dkM21wN3g0aGZreWltIn0.lxxD9rYjHnNLwMSIKcQ80A';
  var map = new mapboxgl.Map({
      container: 'map',
      style: 'mapbox://styles/mapbox/dark-v10',
      center: [11, 56],
      zoom: 6
  });
  
  map.on('load', function() {
      map.addLayer({
          id: 'clusters',
          type: 'circle',
          source: {
              type: 'geojson',
              data: 'locdata'
          },
          paint: {
              'circle-radius': {
                  'base': 1.75,
                  'stops': [[6, 2], [22, 180]]
              },
              'circle-color': [
                  'match',
                  ['get', 'code'],
                  1,
                  '#00FF00',
                  2,
                  '#FF2D00',
                  3,
                  '#0F00FF',
                  /* other */ '#CCC'
              ],
              'circle-opacity': 0.8,
          }
      });
  });
  