From 5fffb67242b353325279fe85dd87aea47df83b09 Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Wed, 14 Nov 2018 19:02:44 +0100
Subject: [PATCH] Clear canvas when nothing to replay

---
 src/ol/renderer/canvas/VectorLayer.js | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/ol/renderer/canvas/VectorLayer.js b/src/ol/renderer/canvas/VectorLayer.js
index 2d030f60a5..ea80b70909 100644
--- a/src/ol/renderer/canvas/VectorLayer.js
+++ b/src/ol/renderer/canvas/VectorLayer.js
@@ -103,13 +103,16 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
    */
   render(frameState, layerState) {
     const replayGroup = this.replayGroup_;
-    if (!replayGroup || replayGroup.isEmpty()) {
-      return;
-    }
-
     const context = this.context;
     const canvas = context.canvas;
 
+    if (!replayGroup || replayGroup.isEmpty()) {
+      if (canvas.width > 0) {
+        canvas.width = 0;
+      }
+      return;
+    }
+
     const extent = frameState.extent;
     const pixelRatio = frameState.pixelRatio;
     const viewState = frameState.viewState;