クリックしたポイント周囲のフィーチャを選択
マップをクリックして、queryRenderedFeature でフィーチャを問い合わせます。
<!DOCTYPE html><html><head><meta charset="utf-8" /><title>クリックしたポイント周囲のフィーチャを選択</title><meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" /><script src="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.js"></script><link href="https://api.mapbox.com/mapbox-gl-js/v1.6.1/mapbox-gl.css" rel="stylesheet" /><style> body { margin: 0; padding: 0; } #map { position: absolute; top: 0; bottom: 0; width: 100%; }</style></head><body><div id="map"></div> <script> mapboxgl.accessToken = '<your access token here>';var map = new mapboxgl.Map({container: 'map',style: 'mapbox://styles/mapbox/streets-v11',center: [-98, 38.88],minZoom: 2,zoom: 3}); map.on('load', function() {// Add the source to query. In this example we're using// county polygons uploaded as vector tilesmap.addSource('counties', {'type': 'vector','url': 'mapbox://mapbox.82pkq93d'}); map.addLayer({'id': 'counties','type': 'fill','source': 'counties','source-layer': 'original','paint': {'fill-outline-color': 'rgba(0,0,0,0.1)','fill-color': 'rgba(0,0,0,0.1)'}},'settlement-label'); // Place polygon under these labels. map.addLayer({'id': 'counties-highlighted','type': 'fill','source': 'counties','source-layer': 'original','paint': {'fill-outline-color': '#484896','fill-color': '#6e599f','fill-opacity': 0.75},'filter': ['in', 'FIPS', '']},'settlement-label'); // Place polygon under these labels. map.on('click', function(e) {// set bbox as 5px reactangle area around clicked pointvar bbox = [[e.point.x - 5, e.point.y - 5],[e.point.x + 5, e.point.y + 5]];var features = map.queryRenderedFeatures(bbox, {layers: ['counties']}); // Run through the selected features and set a filter// to match features with unique FIPS codes to activate// the `counties-highlighted` layer.var filter = features.reduce(function(memo, feature) {memo.push(feature.properties.FIPS);return memo;},['in', 'FIPS']); map.setFilter('counties-highlighted', filter);});});</script> </body></html>