将弹出窗口移出屏幕会意外关闭弹出窗口(带有leaflet.markercluster的宣传单)

Question

我不明白为什么，但每次我打开一个弹出式窗口，当弹出式窗口比屏幕大，或者我把它的锚点从屏幕上移走时，弹出窗口就会关闭。我现在测试了它，当leaflet.markercluster在运行的时候就会发生这种情况。运行以下代码片段，了解我的意思

使用leaflet.markercluster

弹出窗口在打开时关闭

​

var map = L.map('map').setView([38, -8], 7)

L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map);

var markers = L.markerClusterGroup()

for (let i=0; i<100; i++) {

  let veryLongHtml = "popup " + i + "<br>"
  for (let j=0; j<1000; j++) {
    veryLongHtml+='a '
  }

  const popup = L.popup({
    closeOnClick: false,
    autoClose: false
  }).setContent(veryLongHtml);
  
  const marker = L.marker([
    getRandom(37, 39), 
    getRandom(-9.5, -6.5)
  ]).bindPopup(popup);
  
  markers.addLayer(marker)
}
map.addLayer(markers);

function getRandom(min, max) {
  return Math.random() * (max - min) + min;
}

#map {height: 200px}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet.markercluster/1.4.1/MarkerCluster.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet.markercluster/1.5.0/MarkerCluster.Default.min.css" />

<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet.markercluster/1.4.1/leaflet.markercluster.js"></script>

<div id="map"></div>

​

不使用leaflet.markercluster

在这里，它工作正常，检查：

​

var map = L.map('map').setView([38, -8], 7)

L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map);

for (let i=0; i<10; i++) {

  let veryLongHtml = "popup " + i + "<br>"
  for (let j=0; j<1000; j++) {
    veryLongHtml+='a '
  }

  const popup = L.popup({
    closeOnClick: false,
    autoClose: false
  }).setContent(veryLongHtml);
  
  const marker = L.marker([
    getRandom(37, 39), 
    getRandom(-9.5, -6.5)
  ]).addTo(map).bindPopup(popup);
  
}

function getRandom(min, max) {
  return Math.random() * (max - min) + min;
}

#map {height: 200px}

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet/1.7.1/leaflet.js"></script>
<div id="map"></div>

​

Answer 1

我怀疑这是由于removeOutsideVisibleBounds option (默认情况下启用)删除了远离视口的所有标记和簇，以提高性能。

您可以简单地尝试禁用此选项：

var markers = L.markerClusterGroup({
  removeOutsideVisibleBounds: false
})

也许通过防止删除仍处于打开状态(且该选项已启用)的标记来改进Leaflet.markercluster库可能会很有趣，这将在库存储库中讨论……