In this sample, you can click on the map to query for features within 250 meters of where you clicked. For more explanation about querying features, visit the tutorial.
<html>
<head>
<meta charset="utf-8" />
<title>Query a feature layer (advanced)</title>
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" crossorigin="" />
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" crossorigin=""></script>
<!-- Load Esri Leaflet from CDN -->
<script src="https://unpkg.com/esri-leaflet@3.0.12/dist/esri-leaflet.js"></script>
<!-- Load Esri Leaflet Vector from CDN -->
<script src="https://unpkg.com/esri-leaflet-vector@4.2.3/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([34.19, -118.53], 16);
L.esri.Vector.vectorBasemapLayer("arcgis/colored-pencil", {
apikey: apiKey
}).addTo(map);
const streetLights = L.esri
.featureLayer({
url: "https://maps.lacity.org/lahub/rest/services/Bureau_of_Street_Lighting/MapServer/0",
pointToLayer: function (geojson, latlng) {
return L.circleMarker(latlng);
},
style: {
color: "#5B7CBA",
weight: 2,
opacity: 0.85,
fillOpacity: 0.5
}
})
.addTo(map);
let previousIds = [];
map.on("click", function (e) {
streetLights
.query()
.nearby(e.latlng, 250)
.ids(function (error, ids) {
if (error) {
return;
}
for (let j = 0; j < previousIds.length; j++) {
streetLights.resetStyle(previousIds[j]);
}
if (!ids) {
previousIds = [];
return;
}
previousIds = ids;
for (let i = 0; i < ids.length; i++) {
streetLights.setFeatureStyle(ids[i], {
color: "#BA454E",
weight: 2,
opacity: 0.85,
fillOpacity: 0.5
});
}
});
});
</script>
</body>
</html>