From 152761c3cf6f20cfa794cdd6762a98282663aab8 Mon Sep 17 00:00:00 2001
From: jaehafe <wogkdkrm112@gmail.com>
Date: Fri, 8 May 2026 23:37:58 +0900
Subject: [PATCH] fix(worker): forward define to worker bundle transform

Mirror build.ts's transform.define handling for worker bundles so
worker.rollupOptions.transform.define is respected and oxc's builtin
process.env.NODE_ENV replacement is disabled in favor of vite's define
plugin, matching the main bundle behavior.

Follow-up to #22404.
---
 packages/vite/src/node/plugins/worker.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/vite/src/node/plugins/worker.ts b/packages/vite/src/node/plugins/worker.ts
index ff8144eaae131a..5d3428e04f535f 100644
--- a/packages/vite/src/node/plugins/worker.ts
+++ b/packages/vite/src/node/plugins/worker.ts
@@ -202,6 +202,11 @@ async function bundleWorkerEntry(
     transform: {
       target: workerBuildTarget === false ? undefined : workerBuildTarget,
       ...rollupOptions.transform,
+      define: {
+        ...rollupOptions.transform?.define,
+        // disable builtin process.env.NODE_ENV replacement as it is handled by the define plugin
+        'process.env.NODE_ENV': 'process.env.NODE_ENV',
+      },
     },
     // TODO: remove this and enable rolldown's CSS support later
     moduleTypes: {