From c4c7c6c60bdb5b4be9c397ddb5aa37e534a5988c Mon Sep 17 00:00:00 2001
From: Dmitry Zarva <zarv1k@gmail.com>
Date: Mon, 7 Nov 2022 09:19:29 +0300
Subject: [PATCH] feat: add releaseCanvasOnDestroy flag

---
 src/Global.ts | 11 +++++++++++
 src/Util.ts   |  2 ++
 2 files changed, 13 insertions(+)

diff --git a/src/Global.ts b/src/Global.ts
index d54b8f17..9a5dddc5 100644
--- a/src/Global.ts
+++ b/src/Global.ts
@@ -164,6 +164,17 @@ export const Konva = {
   isDragReady() {
     return !!Konva['DD'].node;
   },
+  /**
+   * Should Konva release canvas elements on destroy. Default is true.
+   * Useful to avoid memory leak issues in Safari on macOS/iOS.
+   * @property releaseCanvasOnDestroy
+   * @default true
+   * @name releaseCanvasOnDestroy
+   * @memberof Konva
+   * @example
+   * Konva.releaseCanvasOnDestroy = true;
+   */
+  releaseCanvasOnDestroy: true,
   // user agent
   document: glob.document,
   // insert Konva into global namespace (window)
diff --git a/src/Util.ts b/src/Util.ts
index edecfa3b..cd15f038 100644
--- a/src/Util.ts
+++ b/src/Util.ts
@@ -958,6 +958,8 @@ export const Util = {
     }
   },
   releaseCanvas(...canvases: HTMLCanvasElement[]) {
+    if (!Konva.releaseCanvasOnDestroy) return;
+
     canvases.forEach(c => {
       c.width = 0;
       c.height = 0;