マウスポインタの下にフィーチャを取得 | Mapbox GL JS | ドキュメント

queryRenderedFeature を使用して、ホバーオーバーマップ要素のプロパティを表示します。

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>マウスポインタの下にフィーチャを取得</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 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>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
const map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v11',
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;
});
 
// Write object as string with an indent of two spaces.
document.getElementById('features').innerHTML = JSON.stringify(
displayFeatures,
null,
2
);
});
</script>
 
</body>
</html>