From d9dc2b99dde69792db4f5a31ffc983f8b04c0bef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Donny/=EA=B0=95=EB=8F=99=EC=9C=A4?= <kdy1997.dev@gmail.com>
Date: Mon, 24 Jan 2022 22:06:17 +0900
Subject: [PATCH] fix(swc): Respect `jsc.experimental.keepImportAssertions`
 (#3352)

swc:
 - Fix `Merge` impl of `JscExperimental`.
---
 crates/swc/src/config/mod.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/crates/swc/src/config/mod.rs b/crates/swc/src/config/mod.rs
index 6f98de854b5..43c981c64c2 100644
--- a/crates/swc/src/config/mod.rs
+++ b/crates/swc/src/config/mod.rs
@@ -985,8 +985,13 @@ pub struct JscExperimental {
 impl Merge for JscExperimental {
     fn merge(&mut self, from: &Self) {
         if self.plugins.is_none() {
-            *self = from.clone();
+            self.plugins = from.plugins.clone();
         }
+        if self.cache_root.is_none() {
+            self.cache_root = from.cache_root.clone();
+        }
+
+        self.keep_import_assertions |= from.keep_import_assertions;
     }
 }