Select features around a clicked point

Click on the map to query features using queryRenderedFeatures.

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<!DOCTYPE html>
<meta charset='utf-8' />
<title>Select features around a clicked point</title>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.css' rel='stylesheet' />
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
<div id='map'></div>
mapboxgl.accessToken = '<your access token here>';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/streets-v9',
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 tiles
map.addSource('counties', {
"type": "vector",
"url": "mapbox://mapbox.82pkq93d"
"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)"
}, 'place-city-sm'); // Place polygon under these labels.
"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", ""]
}, 'place-city-sm'); // Place polygon under these labels.
map.on('click', function(e) {
// set bbox as 5px reactangle area around clicked point
var 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) {
return memo;
}, ['in', 'FIPS']);
map.setFilter("counties-highlighted", filter);