Add a fullscreen control to a map | Mapbox GL JS

This example adds a clickable map control that enables a user to toggle fullscreen mode on and off.

It uses addControl with FullscreenControl to add the button overlay on the map.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Add a fullscreen control to a map</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.13.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.13.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<div id="map"></div>
<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', // container ID
// Choose from Mapbox's core styles, or make your own style with Mapbox Studio
style: 'mapbox://styles/mapbox/outdoors-v12', // style URL
center: [11.255, 43.77], // starting position
zoom: 13 // starting zoom
});
 
map.addControl(new mapboxgl.FullscreenControl());
</script>
 
</body>
</html>