From e5b6a4786e87a4afb4a4a716e23607f672c161e3 Mon Sep 17 00:00:00 2001
From: Jack Robson <143492403+jack-robson@users.noreply.github.com>
Date: Mon, 16 Oct 2023 13:24:07 +0100
Subject: [PATCH] fix(core): conditionally include `hostname` parameter when
 using detect port

- Skip adding the `hostname` parameter if the host is "localhost".
---
 packages/docusaurus/src/server/getHostPort.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/docusaurus/src/server/getHostPort.ts b/packages/docusaurus/src/server/getHostPort.ts
index 4ae80708704f..893f754d46ea 100644
--- a/packages/docusaurus/src/server/getHostPort.ts
+++ b/packages/docusaurus/src/server/getHostPort.ts
@@ -54,7 +54,10 @@ async function choosePort(
   defaultPort: number,
 ): Promise<number | null> {
   try {
-    const port = await detect({port: defaultPort, hostname: host});
+    const port = await detect({
+      port: defaultPort,
+      ...(host !== 'localhost' && {hostname: host}),
+    });
     if (port === defaultPort) {
       return port;
     }