From b4b69cf4b5072943512407236fdb339ab7ef197c Mon Sep 17 00:00:00 2001
From: Alec Larson <1925840+aleclarson@users.noreply.github.com>
Date: Mon, 11 Oct 2021 16:19:31 -0400
Subject: [PATCH] chore(plugin-react): skip `code.replace` call if no React
 alias exists

---
 packages/plugin-react/src/jsx-runtime/restore-jsx.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/plugin-react/src/jsx-runtime/restore-jsx.ts b/packages/plugin-react/src/jsx-runtime/restore-jsx.ts
index d246ec1cc15067..0d4f34eb2b8d00 100644
--- a/packages/plugin-react/src/jsx-runtime/restore-jsx.ts
+++ b/packages/plugin-react/src/jsx-runtime/restore-jsx.ts
@@ -11,6 +11,10 @@ export async function restoreJSX(
   filename: string
 ): Promise<RestoredJSX> {
   const [reactAlias, isCommonJS] = parseReactAlias(code)
+  if (!reactAlias) {
+    return [null, false]
+  }
+
   const reactJsxRE = new RegExp(
     '\\b' + reactAlias + '\\.(createElement|Fragment)\\b',
     'g'