From dc583bd556604ed2927fa239a2b1f4bb94d25d0c Mon Sep 17 00:00:00 2001
From: Daniel Huigens <d.huigens@protonmail.com>
Date: Tue, 1 Feb 2022 17:24:51 +0100
Subject: [PATCH] Check existence of `navigator` before using it

---
 src/util.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util.js b/src/util.js
index c62c09149..b3ff14583 100644
--- a/src/util.js
+++ b/src/util.js
@@ -430,7 +430,8 @@ const util = {
       return os.cpus().length;
     }
 
-    return navigator.hardwareConcurrency || 1;
+    // eslint-disable-next-line no-mixed-operators
+    return typeof navigator !== 'undefined' && navigator.hardwareConcurrency || 1;
   },
 
   isEmailAddress: function(data) {