Display feature layer symbols

The symbols and renderer for a feature layer can be stored in the feature service. This sample demonstrates how to recreate the symbology on the client using the Esri Leaflet Renderers plugin.

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<html>
  <head>
    <meta charset="utf-8" />
    <title>Display feature layer symbols</title>
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.8.0/dist/leaflet.css" crossorigin="" />
    <script src="https://unpkg.com/leaflet@1.8.0/dist/leaflet.js" crossorigin=""></script>

    <!-- Load Esri Leaflet from CDN -->
    <script src="https://unpkg.com/esri-leaflet@^3.0.8/dist/esri-leaflet.js"></script>

    <!-- Load Esri Leaflet Renderers from CDN -->
    <script src="https://unpkg.com/esri-leaflet-renderers@2.1.2" crossorigin=""></script>
    <!-- Load Esri Leaflet Vector from CDN -->
    <script src="https://unpkg.com/esri-leaflet-vector@3.1.1/dist/esri-leaflet-vector.js" crossorigin=""></script>
    <style>
      html,
      body,
      #map {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 14px;
        color: #323232;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      const apiKey = "YOUR_API_KEY";

      const map = L.map("map").setView([37.837, -122.479], 6);

      L.esri.Vector.vectorBasemapLayer("ArcGIS:LightGray:Base", {
        apikey: apiKey
      }).addTo(map);

      // renderer type: unique value
      L.esri
        .featureLayer({
          url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Earthquakes_Since1970/MapServer/0"
        })
        .addTo(map);
    </script>
  </body>
</html>

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