Highlight buildings in the Mapbox Standard Style | Mapbox GL JS

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.

JavaScript

React

JavaScript

React


<!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>

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

JavaScript

React


import React, { useEffect, useRef } from 'react';
import mapboxgl from 'mapbox-gl';
import 'mapbox-gl/dist/mapbox-gl.css';

const MapboxExample = () => {
  const mapContainerRef = useRef(null);
  const mapRef = useRef(null);
  const hoveredBuildingRef = useRef(null);
  const selectedBuildingRef = useRef(null);

  useEffect(() => {
    // TO MAKE THE MAP APPEAR YOU MUST
    // ADD YOUR ACCESS TOKEN FROM
    // https://account.mapbox.com
    mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';

    const map = (mapRef.current = new mapboxgl.Map({
      container: mapContainerRef.current,
      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
        }
      }
    }));

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

    return () => map.remove();
  }, []);

  return (
    <div ref={mapContainerRef} style={{ width: '100%', height: '100%' }} />
  );
};

export default MapboxExample;

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

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