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Add multiple geometries from one GeoJSON source

Add a polygon and circle layer from the same GeoJSON source.

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Add multiple geometries from one GeoJSON source</title>
    <meta property="og:description" content="Add a polygon and circle layer from the same GeoJSON source." />
    <meta charset='utf-8'>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel='stylesheet' href='https://unpkg.com/[email protected]/dist/maplibre-gl.css' />
    <script src='https://unpkg.com/[email protected]/dist/maplibre-gl.js'></script>
    <style>
        body { margin: 0; padding: 0; }
        html, body, #map { height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const map = new maplibregl.Map({
        container: 'map',
        style:
            'https://api.maptiler.com/maps/streets/style.json?key=get_your_own_OpIi9ZULNHzrESv6T2vL',
        center: [-121.403732, 40.492392],
        zoom: 10
    });

    map.on('load', () => {
        map.addSource('national-park', {
            'type': 'geojson',
            'data': {
                'type': 'FeatureCollection',
                'features': [
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Polygon',
                            'coordinates': [
                                [
                                    [-121.353637, 40.584978],
                                    [-121.284551, 40.584758],
                                    [-121.275349, 40.541646],
                                    [-121.246768, 40.541017],
                                    [-121.251343, 40.423383],
                                    [-121.32687, 40.423768],
                                    [-121.360619, 40.43479],
                                    [-121.363694, 40.409124],
                                    [-121.439713, 40.409197],
                                    [-121.439711, 40.423791],
                                    [-121.572133, 40.423548],
                                    [-121.577415, 40.550766],
                                    [-121.539486, 40.558107],
                                    [-121.520284, 40.572459],
                                    [-121.487219, 40.550822],
                                    [-121.446951, 40.56319],
                                    [-121.370644, 40.563267],
                                    [-121.353637, 40.584978]
                                ]
                            ]
                        }
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-121.415061, 40.506229]
                        }
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-121.505184, 40.488084]
                        }
                    },
                    {
                        'type': 'Feature',
                        'geometry': {
                            'type': 'Point',
                            'coordinates': [-121.354465, 40.488737]
                        }
                    }
                ]
            }
        });

        map.addLayer({
            'id': 'park-boundary',
            'type': 'fill',
            'source': 'national-park',
            'paint': {
                'fill-color': '#888888',
                'fill-opacity': 0.4
            },
            'filter': ['==', '$type', 'Polygon']
        });

        map.addLayer({
            'id': 'park-volcanoes',
            'type': 'circle',
            'source': 'national-park',
            'paint': {
                'circle-radius': 6,
                'circle-color': '#B42222'
            },
            'filter': ['==', '$type', 'Point']
        });
    });
</script>
</body>
</html>