debug/sample.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Esri Leaflet Geocoder</title>
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1" />

    <!-- Load Leaflet from their CDN -->
    <link rel="stylesheet" href="../node_modules/leaflet/dist/leaflet.css" />
    <script src="../node_modules/leaflet/dist/leaflet-src.js"></script>

    <script src="../node_modules/esri-leaflet/dist/esri-leaflet-debug.js"></script>

    <link rel="stylesheet" href="../dist/esri-leaflet-geocoder.css" />
    <script src="../dist/esri-leaflet-geocoder-debug.js"></script>

    <!-- Make the map fill the entire page -->
    <style>
      #map {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>

    <script>
      var map = L.map('map').setView([37.74, -121.62], 9);
      // var tiles = L.esri.basemapLayer('Topographic').addTo(map);
      L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="https://osm.org/copyright">OpenStreetMap</a> contributors'
      }).addTo(map);

      var searchControl = L.esri.Geocoding.geosearch({
        providers: [
          L.esri.Geocoding.arcgisOnlineProvider({
            // countries: ['USA', 'GUM', 'VIR', 'PRI'],
            // categories: ['Address', 'Postal', 'Populated Place', ],
            // maxResults: 3,
            apikey: 'YOUR_API_KEY',
            nearby: {
              lat: 37.8095574, // oakland, ca
              lng: -122.2886336
            }
          }),
          L.esri.Geocoding.mapServiceProvider({
            label: 'States and Counties',
            url: 'http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer',
            layers: [2, 3],
            searchFields: ['NAME', 'STATE_NAME']
          }),
          L.esri.Geocoding.featureLayerProvider({
            url: 'https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer/0',
            searchFields: ['areaname'],
            label: 'Cities',
            formatSuggestion: function (feature) {
              return feature.properties.areaname + ', ' + feature.properties.st;
            }
          })
        ]
      }).addTo(map);

      var results = L.layerGroup().addTo(map);

      searchControl.on('results', function(data){
        results.clearLayers();
        for (var i = data.results.length - 1; i >= 0; i--) {
          results.addLayer(L.marker(data.results[i].latlng));
        }
      });
    </script>
  </body>
</html>