leaflet动态调整地图缩放等级

                const bounds = L.geoJSON(geometry).getBounds();
                const center = bounds.getCenter();
                const area = (bounds.getEast() - bounds.getWest()) * (bounds.getNorth() - bounds.getSouth());
                let zoomLevel;
                if (area < 100) {
                zoomLevel = 5;
                } else if (area < 500) {
                zoomLevel = 4;
                } else {
                zoomLevel = 3;
                }