From 15dc326f29bc2e6dae5e2e005df1924d0a6b7b4b Mon Sep 17 00:00:00 2001
From: Christer <chris@vasseng.com>
Date: Wed, 26 Apr 2023 09:30:51 +0200
Subject: [PATCH] Added guard against undefined versions

---
 build.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.js b/build.js
index 4d9ed2e9..c39f88c7 100644
--- a/build.js
+++ b/build.js
@@ -214,7 +214,7 @@ function embed(version, scripts, out, fn, optionals) {
 
         let nversion = version;
 
-        if (nversion.indexOf('11') === 0) {
+        if (nversion && (nversion || '').indexOf('11') === 0) {
           nversion += '/es5/';
         }