场景
Leaflet快速入门与加载OSM显示地图：
https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/122290880
在上面的基础上，怎样使用插件实现放大镜效果如下
注：
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实现
1、插件地址
2、下载源码，引入所需要的leaflet.magnifyingglass.js文件，将css文件直接写在html中，完整html代码
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>leaflet实现放大镜效果</title>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" />
<style>
html,
body,
#map {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
overflow: hidden;
}
.leaflet-magnifying-glass {
border-radius: 50%;
border: 1px solid gray;
box-shadow: 0 0 5px gray;
position: absolute;
overflow: hidden;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.leaflet-magnifying-glass>.leaflet-container {
height: 100%;
width: 100%;
}
/* Webkit-only workaround for the border-radius clipping bug,
applied to the map container */
.leaflet-magnifying-glass-webkit {
border-radius: 50%;
-webkit-mask-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAA5JREFUeNpiYGBgAAgwAAAEAAGbA+oJAAAAAElFTkSuQmCC);
}
</style>
</head>
<body>
<div id="map"></div>
<script type="text/javascript" src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script>
<script type="text/javascript" src="./js/leaflet.magnifyingglass.js"></script>
<script type="text/javascript">
var map = L.map('map').setView([36.09, 120.35], 13);
var tileUrl = "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png";
L.tileLayer(tileUrl, {
attribution: ''
}).addTo(map);
var magnifyingGlass = L.magnifyingGlass({
zoomOffset: 3,
layers: [
L.tileLayer(tileUrl)
]
});
map.addLayer(magnifyingGlass);
// make the glass disappear on click...
magnifyingGlass.on('click', function () {
map.removeLayer(magnifyingGlass);
})
// ...and reappear on right click
map.on('contextmenu', function (mouseEvt) {
if (map.hasLayer(magnifyingGlass)) {
return;
}
map.addLayer(magnifyingGlass);
magnifyingGlass.setLatLng(mouseEvt.latlng);
});
</script>
</body>
</html>
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