クリック時にポリゴン情報を表示
ユーザーがポリゴンをクリックすると、詳細情報を含むポップアップが表示されます。
<!DOCTYPE html><html><head><meta charset="utf-8"><title>クリック時にポリゴン情報を表示</title><meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no"><link href="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.css" rel="stylesheet"><script src="https://api.mapbox.com/mapbox-gl-js/v2.14.1/mapbox-gl.js"></script><style>body { margin: 0; padding: 0; }#map { position: absolute; top: 0; bottom: 0; width: 100%; }</style></head><body><style>.mapboxgl-popup {max-width: 400px;font: 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;}</style><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';// Create a new map.const map = new mapboxgl.Map({container: 'map',style: 'mapbox://styles/mapbox/streets-v11',center: [-100.04, 38.907],zoom: 3}); map.on('load', () => {// Add a source for the state polygons.map.addSource('states', {'type': 'geojson','data': 'https://docs.mapbox.com/mapbox-gl-js/assets/ne_110m_admin_1_states_provinces_shp.geojson'}); // Add a layer showing the state polygons.map.addLayer({'id': 'states-layer','type': 'fill','source': 'states','paint': {'fill-color': 'rgba(200, 100, 240, 0.4)','fill-outline-color': 'rgba(200, 100, 240, 1)'}}); // When a click event occurs on a feature in the states layer,// open a popup at the location of the click, with description// HTML from the click event's properties.map.on('click', 'states-layer', (e) => {new mapboxgl.Popup().setLngLat(e.lngLat).setHTML(e.features[0].properties.name).addTo(map);}); // Change the cursor to a pointer when// the mouse is over the states layer.map.on('mouseenter', 'states-layer', () => {map.getCanvas().style.cursor = 'pointer';}); // Change the cursor back to a pointer// when it leaves the states layer.map.on('mouseleave', 'states-layer', () => {map.getCanvas().style.cursor = '';});});</script> </body></html>