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Highlight buildings in the Mapbox Standard Style

This example demonstrates how to highlight individual buildings in the Mapbox Standard Style using the addInteraction method with the built-in buildings featureset.

The code below demonstrates how to:

  • Highlight a building on hover using the highlight feature state and a pointer cursor to show it is selectable
  • Persistently select a building on click using the select feature state, clearing any previous selection
  • Customize the hover and selection colors using the colorBuildingHighlight and colorBuildingSelect configuration properties
  • Disable 3D landmarks using the show3dLandmarks configuration property, as this highlighting technique does not work for buildings represented as 3D models
Mapbox Standard Style only

The buildings featureset and colorBuildingHighlight/colorBuildingSelect configuration properties are only available in styles that import the Mapbox Standard Style.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Highlight buildings in the Mapbox Standard Style</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.24.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.24.0/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',
        style: 'mapbox://styles/mapbox/standard',
        center: [-74.0066, 40.7135],
        zoom: 15.5,
        pitch: 45,
        bearing: -17.6,
        config: {
            // Customize the highlight and select colors for the buildings featureset.
            // colorBuildingHighlight controls the hover color (default: blue).
            // colorBuildingSelect controls the click/selection color (default: blue).
            // show3dLandmarks is set to false, as this highlighting technique does not work for buildings represented as 3D models.
            basemap: {
                colorBuildingHighlight: '#93C5FD',
                colorBuildingSelect: '#1E40AF',
                show3dLandmarks: false
            }
        }
    });

    let hoveredBuilding = null;
    let selectedBuilding = null;

    // Show a pointer cursor and highlight the building on hover
    map.addInteraction('building-mouseenter', {
        type: 'mouseenter',
        target: { featuresetId: 'buildings', importId: 'basemap' },
        handler: ({ feature }) => {
            if (hoveredBuilding) {
                map.setFeatureState(hoveredBuilding, { highlight: false });
            }
            hoveredBuilding = feature;
            map.setFeatureState(feature, { highlight: true });
            map.getCanvas().style.cursor = 'pointer';
        }
    });

    // Remove the highlight and reset the cursor when the mouse leaves a building.
    // Only clear if the leaving feature matches the currently hovered building —
    // this prevents stale mouseleave events (which fire per-feature due to
    // return false) from clearing a highlight set by a later mouseenter.
    map.addInteraction('building-mouseleave', {
        type: 'mouseleave',
        target: { featuresetId: 'buildings', importId: 'basemap' },
        handler: ({ feature }) => {
            if (hoveredBuilding && feature.id === hoveredBuilding.id) {
                map.setFeatureState(hoveredBuilding, { highlight: false });
                hoveredBuilding = null;
                map.getCanvas().style.cursor = '';
            }
            return false;
        }
    });

    // Persistently select a building on click, clearing any previous selection
    map.addInteraction('building-click', {
        type: 'click',
        target: { featuresetId: 'buildings', importId: 'basemap' },
        handler: ({ feature }) => {
            if (selectedBuilding) {
                map.setFeatureState(selectedBuilding, { select: false });
            }
            selectedBuilding = feature;
            map.setFeatureState(feature, { select: true });
        }
    });
</script>

</body>
</html>
This code snippet will not work as expected until you replace YOUR_MAPBOX_ACCESS_TOKEN with an access token from your Mapbox account.
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