From aa22b43c8df1892da521d1d852fd8f06a6a91ebe Mon Sep 17 00:00:00 2001
From: "Jan T. Sott" <git@idleberg.com>
Date: Sun, 16 Jul 2023 12:13:15 +0200
Subject: [PATCH] keep undefined value

---
 src/telemetry.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/telemetry.ts b/src/telemetry.ts
index 65aee5a..84ee5c7 100644
--- a/src/telemetry.ts
+++ b/src/telemetry.ts
@@ -3,7 +3,7 @@ import TelemetryReporter, { type TelemetryEventProperties, type TelemetryEventMe
 
 function stringifyProperties(properties: Record<string, unknown>): TelemetryEventProperties {
   const newProperties = {};
-  Object.entries(properties).map(([key, value]) => newProperties[key] = String(value));
+  Object.entries(properties).map(([key, value]) => newProperties[key] = typeof value !== 'undefined' ? String(value) : undefined);
 
   return newProperties;
 }