如何在添加新标记和图层之前清除所有标记和图层的传单图？

i have the fallowing code:

我有以下代码：

    map: function (events) {
            var arrayOfLatLngs = [];
            var _this = this;

            // setup a marker group
            var markers = L.markerClusterGroup();

            events.forEach(function (event) {
                // setup the bounds
                arrayOfLatLngs.push(event.location);

                // create the marker
                var marker = L.marker([event.location.lat, event.location.lng]);

                marker.bindPopup(View(event));

                // add marker
                markers.addLayer(marker);
            });

            // add the group to the map
            // for more see https://github.com/Leaflet/Leaflet.markercluster
            this.map.addLayer(markers);

            var bounds = new L.LatLngBounds(arrayOfLatLngs);
            this.map.fitBounds(bounds);
            this.map.invalidateSize();
        }
    map: