From 8741ec8ed44a01e51317be70b79eaff181640302 Mon Sep 17 00:00:00 2001
From: Haoqun Jiang <haoqunjiang@gmail.com>
Date: Wed, 28 Jul 2021 16:14:59 +0800
Subject: [PATCH] fix: use `toLowerCase`, shouldn't involve locale here

---
 packages/vite/src/node/plugins/esbuild.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/vite/src/node/plugins/esbuild.ts b/packages/vite/src/node/plugins/esbuild.ts
index 41ff073cab9bac..37009e4de7eb2b 100644
--- a/packages/vite/src/node/plugins/esbuild.ts
+++ b/packages/vite/src/node/plugins/esbuild.ts
@@ -118,7 +118,7 @@ export async function transformWithEsbuild(
 
     // align with TypeScript 4.3
     // https://github.com/microsoft/TypeScript/pull/42663
-    if (loadedCompilerOptions.target?.toLocaleLowerCase() === 'esnext') {
+    if (loadedCompilerOptions.target?.toLowerCase() === 'esnext') {
       compilerOptionsForFile.useDefineForClassFields =
         loadedCompilerOptions.useDefineForClassFields ?? true
     }