Link

<!--
  示例：地图状态链接 — OpenLayers link
  核心逻辑：moveend 时把 zoom / 纬度 / 经度写进 URL 哈希，打开链接即可还原视角
  依赖：OpenLayers 10.3.1 · 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>地图状态链接</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@10.3.1/ol.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}
  .bar{flex:0 0 auto;padding:8px 12px;background:#f6f7f9;border-bottom:1px solid #e3e6ea;
       display:flex;gap:10px;align-items:center;font-size:12px;color:#58606e;flex-wrap:wrap}
  .bar button{font:inherit;padding:3px 9px;border:1px solid #ccd2da;background:#fff;
       border-radius:3px;cursor:pointer;color:#2b3140}
  .bar code{background:#e9ecf1;padding:1px 6px;border-radius:3px;color:#2b3140}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <button id="copy">复制当前链接</button>
  <button id="reset">回到初始视角</button>
  <span>当前 <code id="hash">#</code></span>
</div>
<div id="map"></div>
<script src="https://cdn.jsdelivr.net/npm/ol@10.3.1/dist/ol.js"></script>
<script>
(function () {
  'use strict';

  if (typeof ol === 'undefined') {
    document.getElementById('map').innerHTML =
      '<div style="padding:20px;color:#b42318">OpenLayers 加载失败，请检查能否访问 cdn.jsdelivr.net</div>';
    return;
  }

  var DEFAULT = { lon: 116.391, lat: 39.907, zoom: 12 };
  var hashEl = document.getElementById('hash');

  /* 解析 #zoom/lat/lon，格式与常见地图分享链接一致 */
  function readHash() {
    var raw = decodeURIComponent(window.location.hash.replace(/^#/, ''));
    var parts = raw.split('/');
    if (parts.length === 3) {
      var z = parseFloat(parts[0]);
      var lat = parseFloat(parts[1]);
      var lon = parseFloat(parts[2]);
      if (!isNaN(z) && !isNaN(lat) && !isNaN(lon)) {
        return { zoom: z, lat: lat, lon: lon };
      }
    }
    return DEFAULT;
  }

  var start = readHash();

  var view = new ol.View({
    center: ol.proj.fromLonLat([start.lon, start.lat]),
    zoom: start.zoom,
    minZoom: 2,
    maxZoom: 19
  });

  var map = new ol.Map({
    target: 'map',
    layers: [
      new ol.layer.Tile({ source: new ol.source.XYZ({url: 'https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}', attributions: 'Tiles © Esri'}) })
    ],
    view: view,
    controls: ol.control.defaults.defaults({ attribution: false })
  });

  function currentHash() {
    var c = ol.proj.toLonLat(view.getCenter());
    return '#' + view.getZoom().toFixed(2) + '/' +
      c[1].toFixed(5) + '/' + c[0].toFixed(5);
  }

  function writeHash() {
    var h = currentHash();
    hashEl.textContent = h;
    if (window.history && window.history.replaceState) {
      window.history.replaceState(null, '', h);
    }
  }

  map.on('moveend', writeHash);
  writeHash();

  document.getElementById('copy').addEventListener('click', function () {
    var url = window.location.href.split('#')[0] + currentHash();
    var btn = this;
    var done = function () {
      btn.textContent = '已复制';
      setTimeout(function () { btn.textContent = '复制当前链接'; }, 1200);
    };
    if (navigator.clipboard && window.isSecureContext) {
      navigator.clipboard.writeText(url).then(done, function () {
        window.prompt('复制下面的链接', url);
      });
    } else {
      window.prompt('复制下面的链接', url);
    }
  });

  document.getElementById('reset').addEventListener('click', function () {
    view.animate({
      center: ol.proj.fromLonLat([DEFAULT.lon, DEFAULT.lat]),
      zoom: DEFAULT.zoom,
      duration: 400
    });
  });
})();
</script>
</body>
</html>