You can use a SQL query to return selected features from a feature layer. For more explanation, visit the tutorial.
<html>
<head>
<meta charset="utf-8" />
<title>Query a feature layer</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>
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<script src="https://unpkg.com/esri-leaflet@3.0.10/dist/esri-leaflet.js"></script>
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<script src="https://unpkg.com/esri-leaflet-renderers@3.0.0" crossorigin=""></script>
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<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>
<style>
#query {
position: absolute;
top: 10px;
right: 10px;
z-index: 1000;
background: white;
padding: 1em;
}
#query select {
font-size: 16px;
}
</style>
<div id="map"></div>
<div id="query" class="leaflet-bar">
<label>
Zoning District:
<select id="district">
<!-- make sure to encase string values in single quotes for valid sql -->
<option value="1=1">Any</option>
<option value="ZONE_SMRY='OPEN SPACE'">Open Space</option>
<option value="ZONE_SMRY='AGRICULTURE'">Agriculture</option>
<option value="ZONE_SMRY='RESIDENTIAL'">Residential</option>
<option value="ZONE_SMRY='COMMERCIAL'">Commercial</option>
<option value="ZONE_SMRY='INDUSTRIAL'">Industrial</option>
<option value="ZONE_SMRY='PARKING'">Parking</option>
<option value="ZONE_SMRY='PUBLIC FACILITY'">Public Facility</option>
</select>
</label>
</div>
<script>
const apiKey = "YOUR_API_KEY";
const map = L.map("map").setView([34.19, -118.53], 15);
L.esri.Vector.vectorBasemapLayer("osm/light-gray", {
apikey: apiKey
}).addTo(map);
const zoning = L.esri
.featureLayer({
url: "https://services5.arcgis.com/7nsPwEMP38bSkCjy/arcgis/rest/services/TEST_PYTHON_ZONING/FeatureServer/0",
simplifyFactor: 0.5,
precision: 4
})
.addTo(map);
const zoningDistrict = document.getElementById("district");
zoningDistrict.addEventListener("change", function () {
zoning.setWhere(zoningDistrict.value);
});
</script>
</body>
</html>