leaflet 删除多边形

https://leafletjs.com/examples/quick-start/

let layer = ‘’

let latlngs=[ [51.509, -0.08], [51.503, -0.06], [51.51, -0.047] ]

layer=L.polygon(latlngs,{color:'blue',fillColor:'none',opacity: 0.2 })

解释： （opacity是透明度，fileColor是填充颜色，color是边框颜色）

添加：map.addLayer(this.layer)

 移除： map.removeLayer(this.layer)