External Map

<!--
  说明：独立窗口地图
  核心逻辑：window.open 写入 HTML 骨架，再用 map.setTarget 迁移地图容器
  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>独立窗口地图</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:4px 10px;border:1px solid #c9d0da;border-radius:5px;
              background:#fff;color:#1f2a37;cursor:pointer}
  #info{margin-left:auto}
  #map{flex:1 1 auto;min-height:0;background:#eef0f3}
</style>
</head>
<body>
<div class="bar">
  <button id="open">在新窗口打开</button>
  <button id="back">收回主窗口</button>
  <span id="info">—</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 fromLonLat = ol.proj.fromLonLat;

  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: new ol.View({ center: fromLonLat([116.391, 39.907]), zoom: 10, minZoom: 2, maxZoom: 19 }),
    controls: ol.control.defaults.defaults({ attribution: false, rotate: false })
  });

  var info = document.getElementById('info');
  var child = null;

  document.getElementById('open').addEventListener('click', function () {
    child = window.open('', 'olExternalMap', 'width=900,height=620');
    if (!child) {
      info.textContent = '新窗口被拦截，请允许弹出窗口后重试';
      return;
    }

    var doc = child.document;
    doc.open();
    doc.write('<!DOCTYPE html><html lang="zh-CN"><head>
<meta name="robots" content="noindex,follow"><meta charset="utf-8">' +
      '<title>独立窗口地图</title>' +
      '<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@10.3.1/ol.css">' +
      '<style>html,body{height:100%;margin:0}#map{height:100%;background:#eef0f3}</style>' +
      '</head><body><div id="map"></div></body></html>');
    doc.close();

    map.setTarget(doc.getElementById('map'));
    info.textContent = '地图已迁移到新窗口';
  });

  document.getElementById('back').addEventListener('click', function () {
    map.setTarget('map');
    if (child && !child.closed) child.close();
    child = null;
    info.textContent = '地图已收回主窗口';
  });
})();
</script>
</body>
</html>