leaflet 自定义 featurelayer的 popup

let linepopup;

            LineLayer.on('mouseover', function (e) {

                let loc = e.layer.feature.geometry.coordinates;
                let tooltip = e.layer.feature.properties.lineGXLX + ' DN ' + e.layer.feature.properties.lineGJ + ' ' + e.layer.feature.properties.lineGC


                let latlng = L.latLng(loc[0][1], loc[0][0]);
                let length = e.layer.feature.properties.Shape__Length;

                linepopup = L.popup()
                    .setLatLng(latlng)
                    .setContent('<p>' + tooltip + '<br /> 长度: ' + length.toFixed(2) + ' m</p>')
                    .openOn(map);

            });

            LineLayer.on('mouseout', function (e) {
                if (linepopup) {
                    linepopup.remove();
                }
            })