マップのパンを指定エリアに制限

maxBounds を設定して、マップが別の場所にパンさできないようにします。

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>マップのパンを指定エリアに制限</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.js"></script>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.css" rel="stylesheet" />
<style>
	body { margin: 0; padding: 0; }
	#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<script>
	mapboxgl.accessToken = '<your access token here>';
// Set bounds to New York, New York
var bounds = [
[-74.04728500751165, 40.68392799015035], // Southwest coordinates
[-73.91058699000139, 40.87764500765852] // Northeast coordinates
];
 
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v11',
center: [-73.9978, 40.7209],
zoom: 13,
maxBounds: bounds // Sets bounds as max
});
</script>
 
</body>
</html>