Features Under the Pointer
Call map.queryRenderedFeatures(e.point) to inspect which style features sit under the pointer. Here it reports the count and the topmost layer.
import { MaptoolkitLogoControl } from 'https://cdn.jsdelivr.net/npm/@maptoolkit/maplibre-gl-logo/+esm';
const map = new maplibregl.Map({ container: 'map', attributionControl: { customAttribution: '' }, style: 'https://styles.maptoolkit.org/summer.json', center: [2.1734, 41.3851], zoom: 13 }); // Barcelona
const out = document.getElementById('out');
map.on('mousemove', function (e) {
const f = map.queryRenderedFeatures(e.point);
out.textContent = f.length ? ('Features: ' + f.length + ' top layer: ' + f[0].layer.id) : 'No features';
});
map.addControl(new MaptoolkitLogoControl());<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/maplibre-gl.js"></script>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/maplibre-gl.css" />
<style>
html, body { width: 100%; height: 100%; margin: 0; padding: 0; }
#map { width: 100%; height: 100%; }
</style>
</head>
<body>
<pre id="out" style="position:absolute;bottom:10px;left:10px;z-index:1;margin:0;background:#fff;padding:6px 8px;border-radius:4px;font:12px monospace;box-shadow:0 1px 4px rgba(0,0,0,.3)"></pre>
<div id="map"></div>
<script type="module">
import { MaptoolkitLogoControl } from 'https://cdn.jsdelivr.net/npm/@maptoolkit/maplibre-gl-logo/+esm';
const map = new maplibregl.Map({ container: 'map', attributionControl: { customAttribution: '' }, style: 'https://styles.maptoolkit.org/summer.json', center: [2.1734, 41.3851], zoom: 13 }); // Barcelona
const out = document.getElementById('out');
map.on('mousemove', function (e) {
const f = map.queryRenderedFeatures(e.point);
out.textContent = f.length ? ('Features: ' + f.length + ' top layer: ' + f[0].layer.id) : 'No features';
});
map.addControl(new MaptoolkitLogoControl());
</script>
</body>
</html>