From 6b619c4be210dbab0164f42ee4b358c3ac34a896 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Tue, 26 Jan 2021 12:56:03 -0500
Subject: [PATCH] fix(optimizer): do not perform treeshaking for pre-bundling

---
 packages/vite/src/node/optimizer/index.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/vite/src/node/optimizer/index.ts b/packages/vite/src/node/optimizer/index.ts
index 7d8bf259c8fe02..1b1fd521d34a7a 100644
--- a/packages/vite/src/node/optimizer/index.ts
+++ b/packages/vite/src/node/optimizer/index.ts
@@ -234,6 +234,7 @@ export async function optimizeDeps(
     splitting: true,
     sourcemap: true,
     outdir: cacheDir,
+    treeShaking: 'ignore-annotations',
     metafile: esbuildMetaPath,
     define: {
       'process.env.NODE_ENV': '"development"'