From f1749f03e3f3c691653b6ac7108195bfea67e6a2 Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Tue, 12 Jan 2021 14:29:15 +0100
Subject: [PATCH] Ensure that `PDFViewerApplication.close` has a *consistent*
 return value

---
 web/app.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/web/app.js b/web/app.js
index 45e156734..0512310b3 100644
--- a/web/app.js
+++ b/web/app.js
@@ -867,7 +867,9 @@ const PDFViewerApplication = {
     if (typeof PDFBug !== "undefined") {
       PDFBug.cleanup();
     }
-    return Promise.all(promises);
+    await Promise.all(promises);
+
+    return undefined;
   },
 
   /**