From cf1c496e01b07d79dbea00ef209870c381a301ba Mon Sep 17 00:00:00 2001
From: luhc228 <luhengchang228@126.com>
Date: Mon, 9 Oct 2023 18:05:37 +0800
Subject: [PATCH] fix: user compilation config lose

---
 packages/plugin-rax-compat/src/index.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/plugin-rax-compat/src/index.ts b/packages/plugin-rax-compat/src/index.ts
index 43bf4ced5c..48dcd1c970 100644
--- a/packages/plugin-rax-compat/src/index.ts
+++ b/packages/plugin-rax-compat/src/index.ts
@@ -97,9 +97,13 @@ const plugin: Plugin<CompatRaxOptions> = (options = {}) => ({
         type: false,
       });
 
+      // Must create a variable to store the original compilationConfig.
+      const originalSwcCompilationConfig = typeof config.swcOptions?.compilationConfig === 'object'
+        ? cloneDeep(config.swcOptions?.compilationConfig || {})
+        : {};
       const compilationConfigFunc = typeof config.swcOptions?.compilationConfig === 'function'
         ? config.swcOptions?.compilationConfig
-        : () => config.swcOptions?.compilationConfig;
+        : () => originalSwcCompilationConfig;
 
       // Reset jsc.transform.react.runtime to classic.
       config.swcOptions = merge(config.swcOptions || {}, {