Get features under the mouse pointer
Use queryRenderedFeatures to show properties of hovered-over map elements.
<!DOCTYPE html>
<html lang="en">
<head>
<title>Get features under the mouse pointer</title>
<meta property="og:description" content="Use queryRenderedFeatures to show properties of hovered-over map elements." />
<meta charset='utf-8'>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel='stylesheet' href='https://unpkg.com/maplibre-gl@4.7.1/dist/maplibre-gl.css' />
<script src='https://unpkg.com/maplibre-gl@4.7.1/dist/maplibre-gl.js'></script>
<style>
body { margin: 0; padding: 0; }
html, body, #map { height: 100%; }
</style>
</head>
<body>
<style>
#features {
position: absolute;
top: 0;
right: 0;
bottom: 0;
width: 50%;
overflow: auto;
background: rgba(255, 255, 255, 0.8);
}
#map canvas {
cursor: crosshair;
}
</style>
<div id="map"></div>
<pre id="features"></pre>
<script>
const map = new maplibregl.Map({
container: 'map',
style:
'https://api.maptiler.com/maps/streets/style.json?key=get_your_own_OpIi9ZULNHzrESv6T2vL',
center: [-96, 37.8],
zoom: 3
});
map.on('mousemove', (e) => {
const features = map.queryRenderedFeatures(e.point);
// Limit the number of properties we're displaying for
// legibility and performance
const displayProperties = [
'type',
'properties',
'id',
'layer',
'source',
'sourceLayer',
'state'
];
const displayFeatures = features.map((feat) => {
const displayFeat = {};
displayProperties.forEach((prop) => {
displayFeat[prop] = feat[prop];
});
return displayFeat;
});
document.getElementById('features').innerHTML = JSON.stringify(
displayFeatures,
null,
2
);
});
</script>
</body>
</html>