From 230ab4589912afecb3b277e30bdcf74171dfeb2e Mon Sep 17 00:00:00 2001
From: Damir Mustafin <damir.mustafin@protonmail.ch>
Date: Sat, 13 Nov 2021 22:19:23 +0300
Subject: [PATCH] add undefined as a return type

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

diff --git a/src/index.ts b/src/index.ts
index 2a29061..a48215f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -56,7 +56,7 @@ function ipv6_check (ip_addr: string) {
     /^ff([0-9a-fA-F]{2,2}):/i.test(ip_addr)
 }
 
-export default (ip: string) => {
+export default (ip: string): boolean | undefined => {
   if (is_valid(ip)) {
     const parsed = parse(ip)