Vector Tiles

<!--
  示例：矢量瓦片
  核心逻辑：注册 vector 源指向 PBF 瓦片，按 source-layer 分别添加面、线、标注图层
  依赖：MapLibre GL JS 4 · jsDelivr CDN · demotiles 样式与瓦片
-->
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta name="robots" content="noindex,follow">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>矢量瓦片</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/maplibre-gl@4/dist/maplibre-gl.css">
<style>
  html,body{height:100%;margin:0}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif;color:#16181d}
  .bar{flex:0 0 auto;display:flex;gap:12px;align-items:center;padding:8px 12px;
       background:#f6f7f9;border-bottom:1px solid #e3e6ea;font-size:12px;color:#58606e;flex-wrap:wrap}
  .bar b{color:#16181d;font-weight:600}
  #map{flex:1 1 auto;min-height:0}
</style>
</head>
<body>
<div class="bar">
  <span>源 <b>vector · maxzoom 6</b></span>
  <span>源图层 <b>countries / centroids</b></span>
  <span>缩放 <b id="z">—</b></span>
</div>
<div id="map"></div>
<script src="https://cdn.jsdelivr.net/npm/maplibre-gl@4/dist/maplibre-gl.js"></script>
<script>
(function () {
  'use strict';

  if (typeof maplibregl === 'undefined') {
    document.body.innerHTML =
      '<div style="padding:24px;color:#b42318">MapLibre 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    return;
  }

  var map = new maplibregl.Map({
    container: 'map',
    style: 'https://demotiles.maplibre.org/style.json',
    center: [104.2, 35.5],
    zoom: 3,
    attributionControl: {
      compact: true,
      customAttribution: 'MapLibre demo tiles'
    }
  });

  map.addControl(new maplibregl.NavigationControl(), 'top-right');

  map.on('load', function () {
    map.addSource('world', {
      type: 'vector',
      tiles: ['https://demotiles.maplibre.org/tiles/{z}/{x}/{y}.pbf'],
      minzoom: 0,
      maxzoom: 6,
      attribution: 'MapLibre demo tiles'
    });

    map.addLayer({
      id: 'world-tint',
      type: 'fill',
      source: 'world',
      'source-layer': 'countries',
      paint: {
        'fill-color': [
          'match', ['get', 'CONTINENT'],
          'Asia', '#cfe3f5',
          'Europe', '#e0daf2',
          'Africa', '#f2e7cf',
          'North America', '#d9eee0',
          'South America', '#f5dede',
          'Oceania', '#e3ead0',
          '#e6eaf0'
        ],
        'fill-opacity': 0.7
      }
    });

    map.addLayer({
      id: 'world-edge',
      type: 'line',
      source: 'world',
      'source-layer': 'countries',
      paint: {
        'line-color': '#5b7c9d',
        'line-width': ['interpolate', ['linear'], ['zoom'], 2, 0.4, 6, 1.2]
      }
    });

    map.addLayer({
      id: 'world-label',
      type: 'symbol',
      source: 'world',
      'source-layer': 'centroids',
      layout: {
        'text-field': ['get', 'NAME'],
        'text-font': ['Noto Sans Regular'],
        'text-size': ['interpolate', ['linear'], ['zoom'], 2, 9, 6, 13],
        'text-transform': 'uppercase'
      },
      paint: {
        'text-color': '#2d3c4d',
        'text-halo-color': '#ffffff',
        'text-halo-width': 1.2
      }
    });
  });

  map.on('moveend', function () {
    document.getElementById('z').textContent = map.getZoom().toFixed(2);
  });

  map.on('error', function (e) {
    if (e.error) console.warn('地图错误：' + e.error.message);
  });
})();
</script>
</body>
</html>