如何使用mapbox在同一图层中绘制多个不同颜色的点？

mapboxgl.accessToken = 'YOUR_ACCESS_TOKEN';
var map = new mapboxgl.Map({
  container: 'map',
  style: 'mapbox://styles/mapbox/streets-v11',
  center: [lng, lat],
  zoom: zoomLevel
});

map.on('load', function() {
  map.addSource('points', {
    type: 'geojson',
    data: 'YOUR_GEOJSON_DATA'
  });

  map.addLayer({
    id: 'point-layer',
    type: 'circle',
    source: 'points',
    paint: {
      'circle-radius': 6,
      'circle-color': [
        'match',
        ['get', 'category'],
        'category1', 'color1',
        'category2', 'color2',
        'category3', 'color3',
        'default-color'
      ]
    }
  });
});

map.addLayer({
  id: 'point-layer',
  type: 'circle',
  source: 'points',
  paint: {
    'circle-radius': 6,
    'circle-color': [
      'match',
      ['get', 'category'],
      'category1', 'color1',
      'category2', 'color2',
      'category3', 'color3',
      'default-color'
    ],
    'circle-stroke-color': 'black',
    'circle-stroke-width': 1,
    'circle-opacity': 0.8
  }
});