Vector Tile Info

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<!DOCTYPE html>
<html>
  <head>
    <title>Vector Tile Info</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>

    <style>
      #map {
        position: relative;
      }

      #info {
        z-index: 1;
        opacity: 0;
        position: absolute;
        bottom: 0;
        left: 0;
        margin: 0;
        background: rgba(0,60,136,0.7);
        color: white;
        border: 0;
        transition: opacity 100ms ease-in;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map">
      <pre id="info"/>
    </div>
    <script>
      import Map from 'ol/Map.js';
      import View from 'ol/View.js';
      import MVT from 'ol/format/MVT.js';
      import VectorTileLayer from 'ol/layer/VectorTile.js';
      import VectorTileSource from 'ol/source/VectorTile.js';

      var map = new Map({
        target: 'map',
        view: new View({
          center: [0, 0],
          zoom: 2
        }),
        layers: [new VectorTileLayer({
          source: new VectorTileSource({
            format: new MVT(),
            url: 'https://basemaps.arcgis.com/v1/arcgis/rest/services/World_Basemap/VectorTileServer/tile/{z}/{y}/{x}.pbf'
          })
        })]
      });

      map.on('pointermove', showInfo);

      var info = document.getElementById('info');
      function showInfo(event) {
        var features = map.getFeaturesAtPixel(event.pixel);
        if (!features) {
          info.innerText = '';
          info.style.opacity = 0;
          return;
        }
        var properties = features[0].getProperties();
        info.innerText = JSON.stringify(properties, null, 2);
        info.style.opacity = 1;
      }
    </script>
  </body>
</html>