Custom Popup with Dynamic Map Layer

Customizing a popup on a Dynamic Map Layer. Click to render a popup. More information about Map Services can be found in the L.esri.DynamicMapLayer documentation.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8" />
  <title>Custom Popup with Dynamic Map Layer</title>
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />

  <!-- Load Leaflet from CDN -->
  <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
    integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
    crossorigin=""/>
  <script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"
    integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
    crossorigin=""></script>

  <!-- Load Esri Leaflet from CDN -->
  <script src="https://unpkg.com/esri-leaflet@3.0.8/dist/esri-leaflet.js"
    integrity="sha512-E0DKVahIg0p1UHR2Kf9NX7x7TUewJb30mxkxEm2qOYTVJObgsAGpEol9F6iK6oefCbkJiA4/i6fnTHzM6H1kEA=="
    crossorigin=""></script>

  <style>
    body { margin:0; padding:0; }
    #map { position: absolute; top:0; bottom:0; right:0; left:0; }
  </style>
</head>
<body>

<div id="map"></div>

<script>
  var map = L.map('map', {
    minZoom: 3
  }).setView([38.5, -96.8], 4);

  var wildfireRisk = L.esri.dynamicMapLayer({
    url: 'https://maps7.arcgisonline.com/arcgis/rest/services/USDA_USFS_2014_Wildfire_Hazard_Potential/MapServer',
    // server response content type can be either 'json' (default) or 'image'
    f: 'image'
  }).addTo(map);

  wildfireRisk.bindPopup(function (error, featureCollection) {
    if (error || featureCollection.features.length === 0) {
      return false;
    } else {
      return 'Risk Level: ' + featureCollection.features[0].properties.CLASS_DESC;
    }
  });
</script>

</body>
</html>

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