Styling polygons
Custom styling of polygons with the style option. More information about Feature Layers can be found in the L.esri.FeatureLayer documentation.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Styling polygons</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@3.0.3/dist/esri-leaflet.js"
integrity="sha512-kuYkbOFCV/SsxrpmaCRMEFmqU08n6vc+TfAVlIKjR1BPVgt75pmtU9nbQll+4M9PN2tmZSAgD1kGUCKL88CscA=="
crossorigin=""></script>
<!-- Load Esri Leaflet Vector from CDN -->
<script src="https://unpkg.com/esri-leaflet-vector@3.1.0/dist/esri-leaflet-vector.js"
integrity="sha512-AAcPGWoYOQ7VoaC13L/rv6GwvzEzyknHQlrtdJSGD6cSzuKXDYILZqUhugbJFZhM+bEXH2Ah7mA1OxPFElQmNQ=="
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').setView([33.836, -118.22], 8);
L.esri.Vector.vectorBasemapLayer('ArcGIS:LightGray', {
apikey: apiKey // Replace with your API key - https://developers.arcgis.com
}).addTo(map);
L.esri.featureLayer({
url: 'https://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/USA_Congressional_Districts/FeatureServer/0',
simplifyFactor: 0.5,
precision: 5,
style: function (feature) {
if (feature.properties.PARTY === 'Democrat') {
return { color: 'blue', weight: 2 };
} else if (feature.properties.PARTY === 'Republican') {
return { color: 'red', weight: 2 };
} else {
return { color: 'white', weight: 2 };
}
}
}).addTo(map);
</script>
</body>
</html>