From 17659b9a809df574031622eae8fe9221b83fe0aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maximilian=20Kr=C3=B6g?= <maxi_kroeg@web.de>
Date: Thu, 24 Dec 2020 01:13:50 +0100
Subject: [PATCH] Do not fire duplicate postrender events

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

diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index a48d7922c8..204b348099 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -1140,6 +1140,7 @@ class PluggableMap extends BaseObject {
     if (!targetElement) {
       if (this.renderer_) {
         clearTimeout(this.postRenderTimeoutHandle_);
+        this.postRenderTimeoutHandle_ = undefined;
         this.postRenderFunctions_.length = 0;
         this.renderer_.dispose();
         this.renderer_ = null;
@@ -1438,10 +1439,12 @@ class PluggableMap extends BaseObject {
 
     this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));
 
-    this.postRenderTimeoutHandle_ = setTimeout(
-      this.handlePostRender.bind(this),
-      0
-    );
+    if (!this.postRenderTimeoutHandle_) {
+      this.postRenderTimeoutHandle_ = setTimeout(() => {
+        this.postRenderTimeoutHandle_ = undefined;
+        this.handlePostRender();
+      }, 0);
+    }
   }
 
   /**