如何允许使用Leaflet.draw编辑特征/多边形？

<script src="leaflet.js"></script>
<script src="leaflet.draw.js"></script>

<div id="map" style="width: 100%; height: 400px;"></div>

var map = L.map('map').setView([51.505, -0.09], 13);

var tileLayer = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors',
    maxZoom: 18
}).addTo(map);

var drawnItems = new L.FeatureGroup();
map.addLayer(drawnItems);

var drawControl = new L.Control.Draw({
    draw: {
        polygon: true,
        polyline: false,
        rectangle: false,
        circle: false,
        marker: false
    },
    edit: {
        featureGroup: drawnItems
    }
});
map.addControl(drawControl);

map.on(L.Draw.Event.CREATED, function (event) {
    var layer = event.layer;
    drawnItems.addLayer(layer);
});