From 940f7f77f581e535e012bd6f1cadbd79a6f50785 Mon Sep 17 00:00:00 2001
From: contributor <foss.contributor@gmail.com>
Date: Sat, 14 Mar 2026 11:00:56 +0200
Subject: [PATCH] add automatic removal of the event

---
 packages/pdfjs-viewer/src/custom.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/pdfjs-viewer/src/custom.ts b/packages/pdfjs-viewer/src/custom.ts
index 1344a68897..4bfa955d70 100644
--- a/packages/pdfjs-viewer/src/custom.ts
+++ b/packages/pdfjs-viewer/src/custom.ts
@@ -49,7 +49,7 @@ function configurePdfViewerOptions() {
         }
     };
     if (window.parent && window.parent !== window) {
-        window.parent.addEventListener("webviewerloaded", pdfOptionsHandler);
+        window.parent.addEventListener("webviewerloaded", pdfOptionsHandler, { once: true });
         window.addEventListener("pagehide", () => window.parent.removeEventListener("webviewerloaded", pdfOptionsHandler));
     }
 }