fix(minifier): keep esm in dce (#8677)

fixes rolldown/rolldown#3402
oxc-project · Jan 23, 2025 · 883d25b · 883d25b
1 parent ce2b9da
commit 883d25b
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/crates/oxc_minifier/src/peephole/remove_dead_code.rs b/crates/oxc_minifier/src/peephole/remove_dead_code.rs
@@ -113,8 +113,10 @@ impl<'a, 'b> PeepholeOptimizations {
             if i - 1 <= index {
                 return true;
             }
-            // keep function declaration
-            if matches!(s.as_declaration(), Some(Declaration::FunctionDeclaration(_))) {
+            // Keep module syntax and function declaration
+            if s.is_module_declaration()
+                || matches!(s.as_declaration(), Some(Declaration::FunctionDeclaration(_)))
+            {
                 return true;
             }
             false
@@ -812,4 +814,10 @@ mod test {
         test("!1", "");
         test("1", "");
     }
+
+    #[test]
+    fn keep_module_syntax() {
+        test_same("throw foo; export let bar");
+        test_same("throw foo; export default bar");
+    }
 }