From 70e8d7f0c46ae59bfa7945faaa00de4575ae406d Mon Sep 17 00:00:00 2001
From: Angelina Nguyen <nangelina1412@gmail.com>
Date: Fri, 9 Feb 2024 19:55:18 +1100
Subject: [PATCH] see pr: https://github.com/niklasvh/html2canvas/pull/2949

Squashed commit of the following:

commit 96cc89a27dbd35efb3e3373fb87c3964edd41b71
Author: yuyuyzl <yuzhongliang221@gmail.com>
Date:   Tue Sep 6 10:36:07 2022 +0800

    fix: cleanup iframe first to prevent memory leaks, see #1609

commit 485a49e45129797df556591046e4e55608de4666
Author: yuyuyzl <yuzhongliang221@gmail.com>
Date:   Tue Sep 6 10:28:22 2022 +0800

    fix: cleanup iframe first to prevent memory leaks, see #1609
---
 src/dom/document-cloner.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/dom/document-cloner.ts b/src/dom/document-cloner.ts
index ad0369524..5ae61e0ea 100644
--- a/src/dom/document-cloner.ts
+++ b/src/dom/document-cloner.ts
@@ -489,6 +489,16 @@ export class DocumentCloner {
     }
 
     static destroy(container: HTMLIFrameElement): boolean {
+        // cleanup iframe first to prevent memory leaks, see #1609
+        try {
+            const iframe = container.contentWindow;
+            container.src = 'about:blank';
+            if (iframe) {
+                iframe.document.write('');
+                iframe.document.clear();
+                iframe.close();
+            }
+        } catch {}
         if (container.parentNode) {
             container.parentNode.removeChild(container);
             return true;