Style circles with a data-driven property | Mapbox GL JS

Create a visualization with a data expression for circle-color.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Style circles with a data-driven property</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v2.2.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v2.2.0/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 access token here>';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
zoom: 12,
center: [-122.447303, 37.753574]
});
 
map.on('load', function () {
/* Sample feature from the `examples.8fgz4egr` tileset:
{
"type": "Feature",
"properties": {
"ethnicity": "White"
},
"geometry": {
"type": "Point",
"coordinates": [ -122.447303, 37.753574 ]
}
}
*/
map.addSource('ethnicity', {
type: 'vector',
url: 'mapbox://examples.8fgz4egr'
});
map.addLayer({
'id': 'population',
'type': 'circle',
'source': 'ethnicity',
'source-layer': 'sf2010',
'paint': {
// make circles larger as the user zooms from z12 to z22
'circle-radius': {
'base': 1.75,
'stops': [
[12, 2],
[22, 180]
]
},
// color circles by ethnicity, using a match expression
// https://docs.mapbox.com/mapbox-gl-js/style-spec/#expressions-match
'circle-color': [
'match',
['get', 'ethnicity'],
'White',
'#fbb03b',
'Black',
'#223b53',
'Hispanic',
'#e55e5e',
'Asian',
'#3bb2d0',
/* other */ '#ccc'
]
}
});
});
</script>
 
</body>
</html>