From 7b88dff62dccec22a6b6e228c404ca4e6b7f699e Mon Sep 17 00:00:00 2001
From: sapphi-red <green@sapphi.red>
Date: Mon, 13 Jun 2022 00:41:02 +0900
Subject: [PATCH] refactor: apply suggestion

---
 packages/vite/src/node/logger.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/vite/src/node/logger.ts b/packages/vite/src/node/logger.ts
index d65f07aa5d0c9e..c989449ebe1b48 100644
--- a/packages/vite/src/node/logger.ts
+++ b/packages/vite/src/node/logger.ts
@@ -164,7 +164,7 @@ export function printCommonServerUrls(
   }
 }
 
-const loopbackHosts = new Set<string | undefined>([
+const loopbackHosts = new Set([
   'localhost',
   '127.0.0.1',
   '::1',
@@ -180,7 +180,7 @@ function printServerUrls(
 ): void {
   const urls: Array<{ label: string; url: string }> = []
 
-  if (loopbackHosts.has(hostname.host)) {
+  if (hostname.host && loopbackHosts.has(hostname.host)) {
     let hostnameName = hostname.name
     if (
       hostnameName === '::1' ||