Hover Highlight

<!--
  示例：悬停高亮
  要点：ColumnLayer 开启 autoHighlight，鼠标划过自动提亮
  依赖：deck.gl 9.0 · jsDelivr CDN
-->
<!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>悬停高亮</title>
<style>
  html,body{height:100%;margin:0;background:#0d1117}
  body{display:flex;flex-direction:column;overflow:hidden;
       font:13px/1.6 -apple-system,"Segoe UI","PingFang SC",sans-serif;color:#e6e8ec}
  .bar{position:relative;z-index:5;flex:0 0 auto;padding:8px 12px;background:#161b22;border-bottom:1px solid #252c36;
       display:flex;gap:14px;align-items:center;font-size:12px;color:#8b93a1;flex-wrap:wrap}
  .bar b{color:#58a6ff;font-weight:600}
  .bar label{display:flex;align-items:center;gap:5px;cursor:pointer}
  .bar input[type=checkbox]{accent-color:#4f9ef8}
  .bar input[type=range]{width:150px;accent-color:#4f9ef8}
  .bar button{font:inherit;font-size:12px;padding:3px 10px;border-radius:4px;cursor:pointer;
       border:1px solid #2f3947;background:#1d242e;color:#c9d3e0}
  .bar button:hover{background:#26303d}
  #cv{flex:1 1 auto;min-height:0;width:100%;display:block}

</style>
</head>
<body>
<div class="bar"><span>柱体 <b id="n">—</b></span><span>悬停自动高亮 · 无需额外状态</span></div>
<canvas id="cv"></canvas>
<script src="https://cdn.jsdelivr.net/npm/deck.gl@9.0.35/dist.min.js"></script>
<script>
(function () {
  'use strict';

  if (typeof deck === 'undefined') {
    document.body.innerHTML =
      '<div style="padding:24px;color:#ff8c74">deck.gl 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    return;
  }
  var cols = [];
  for (var x = 0; x < 14; x++) {
    for (var y = 0; y < 10; y++) {
      cols.push({
        lng: 116.30 + x * 0.017,
        lat: 39.83 + y * 0.014,
        v: Math.random()
      });
    }
  }

  document.getElementById('n').textContent = cols.length;

  var deckgl = new deck.Deck({
    canvas: 'cv',
    width: '100%',
    height: '100%',
    initialViewState: { longitude: 116.42, latitude: 39.90, zoom: 10.6, pitch: 50, bearing: -20 },
    controller: true,
    layers: [
      new deck.ColumnLayer({
        id: 'cols',
        data: cols,
        diskResolution: 10,
        radius: 240,
        getPosition: function (d) { return [d.lng, d.lat]; },
        getElevation: function (d) { return d.v * 1200; },
        elevationScale: 1,
        getFillColor: function (d) {
          return [Math.round(60 + 170 * d.v), Math.round(190 - 80 * d.v), Math.round(230 - 160 * d.v), 225];
        },
        pickable: true,
        autoHighlight: true,
        highlightColor: [255, 255, 255, 120]
      })
    ],
    getTooltip: function (info) {
      if (!info.object) return null;
      return '强度 ' + info.object.v.toFixed(2);
    }
  });
  window.__deck = deckgl;
})();
</script>
</body>
</html>