add undefined as a return type

frenchbread · Nov 13, 2021 · 230ab45 · 230ab45
1 parent ca39bc4
commit 230ab45
Showing 1 changed file with 1 addition and 1 deletion.
diff --git 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)