From 02f1d79e740e05449a1379a543f30134a7b25c80 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Wed, 28 May 2025 15:22:37 +0300
Subject: [PATCH] Only reset draw context when it it set

---
 src/ol/renderer/canvas/VectorLayer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/renderer/canvas/VectorLayer.js b/src/ol/renderer/canvas/VectorLayer.js
index 733676079b6..26d86c77e73 100644
--- a/src/ol/renderer/canvas/VectorLayer.js
+++ b/src/ol/renderer/canvas/VectorLayer.js
@@ -254,7 +254,7 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
    * @private
    */
   resetDrawContext_() {
-    if (this.opacity_ !== 1) {
+    if (this.opacity_ !== 1 && this.targetContext_) {
       const alpha = this.targetContext_.globalAlpha;
       this.targetContext_.globalAlpha = this.opacity_;
       this.targetContext_.drawImage(this.context.canvas, 0, 0);