fix possible null clusters

maptalks · Jul 4, 2017 · 1f9ffa3 · 1f9ffa3
1 parent 28c0bcb
commit 1f9ffa3
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/index.js b/index.js
@@ -323,6 +323,9 @@ ClusterLayer.registerRenderer('canvas', class extends maptalks.renderer.VectorLa
     }
 
     _drawClusters(clusters, ratio, matrix) {
+        if (!clusters) {
+            return;
+        }
         matrix = matrix ? matrix['container'] : null;
         this._clusterMaskExtent = this.prepareCanvas();
         const map = this.getMap(),