From 6a1b1ae6a42fcc421d513852b9164be04097b96b Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Fri, 23 Aug 2024 18:39:28 +0200
Subject: [PATCH] Revoke the blob-URLs used during printing in
 `PDFPrintService`

---
 web/pdf_print_service.js | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/web/pdf_print_service.js b/web/pdf_print_service.js
index 7017345a0..45106ca30 100644
--- a/web/pdf_print_service.js
+++ b/web/pdf_print_service.js
@@ -199,10 +199,18 @@ class PDFPrintService {
     wrapper.append(img);
     this.printContainer.append(wrapper);
 
-    return new Promise(function (resolve, reject) {
-      img.onload = resolve;
-      img.onerror = reject;
-    });
+    const { promise, resolve, reject } = Promise.withResolvers();
+    img.onload = resolve;
+    img.onerror = reject;
+
+    promise
+      .catch(() => {
+        // Avoid "Uncaught promise" messages in the console.
+      })
+      .then(() => {
+        URL.revokeObjectURL(img.src);
+      });
+    return promise;
   }
 
   performPrint() {