From 13fc345e8a848c06b3a991c4d2ca8222affc98a4 Mon Sep 17 00:00:00 2001
From: Bjorn Lu <bjornlu.dev@gmail.com>
Date: Wed, 17 May 2023 18:27:38 +0800
Subject: [PATCH] fix(ssr): skip updateCjsSsrExternals if legacy flag disabled
 (#13230)

---
 packages/vite/src/node/server/index.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/vite/src/node/server/index.ts b/packages/vite/src/node/server/index.ts
index c6ad6740bd6f05..17f10e5e8676ab 100644
--- a/packages/vite/src/node/server/index.ts
+++ b/packages/vite/src/node/server/index.ts
@@ -404,7 +404,9 @@ export async function _createServer(
       if (isDepsOptimizerEnabled(config, true)) {
         await initDevSsrDepsOptimizer(config, server)
       }
-      await updateCjsSsrExternals(server)
+      if (config.legacy?.buildSsrCjsExternalHeuristics) {
+        await updateCjsSsrExternals(server)
+      }
       return ssrLoadModule(
         url,
         server,