From d192b405ea48b5734cd7ded2c7dbebddfe5fc469 Mon Sep 17 00:00:00 2001
From: Yun Feng <yun.feng@anu.edu.au>
Date: Wed, 9 Feb 2022 01:49:26 +1100
Subject: [PATCH] fix: an error when I stop the recording process (#828)

canvas-manager.ts:35 Uncaught TypeError: this.resetObservers is not a function
---
 packages/rrweb/src/record/observers/canvas/canvas-manager.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/rrweb/src/record/observers/canvas/canvas-manager.ts b/packages/rrweb/src/record/observers/canvas/canvas-manager.ts
index b7fac7c6..a266e5fb 100644
--- a/packages/rrweb/src/record/observers/canvas/canvas-manager.ts
+++ b/packages/rrweb/src/record/observers/canvas/canvas-manager.ts
@@ -26,13 +26,13 @@ export class CanvasManager {
   private mirror: Mirror;
 
   private mutationCb: canvasMutationCallback;
-  private resetObservers: listenerHandler;
+  private resetObservers?: listenerHandler;
   private frozen: boolean = false;
   private locked: boolean = false;
 
   public reset() {
     this.pendingCanvasMutations.clear();
-    this.resetObservers();
+    this.resetObservers && this.resetObservers();
   }
 
   public freeze() {