Use it

Author: kdy1

Cargo.lock

@@ -23,6 +23,7 @@ swc_common               = { version = "17.0.1", path = "../swc_common" }
 swc_ecma_ast             = { version = "18.0.0", path = "../swc_ecma_ast" }
 swc_ecma_compat_es2022   = { version = "31.0.0", path = "../swc_ecma_compat_es2022" }
 swc_ecma_compiler        = { version = "8.0.0", path = "../swc_ecma_compiler" }
+swc_ecma_transformer     = { version = "0.1.0", path = "../swc_ecma_transformer" }
 swc_ecma_transforms_base = { version = "30.0.0", path = "../swc_ecma_transforms_base" }
 swc_ecma_utils           = { version = "24.0.0", path = "../swc_ecma_utils" }
 swc_ecma_visit           = { version = "18.0.1", path = "../swc_ecma_visit" }

crates/swc_ecma_compat_es2020/Cargo.toml

@@ -1,9 +1,7 @@
 use swc_ecma_ast::Pass;
-use swc_ecma_compiler::{Compiler, Features};
 
 pub fn export_namespace_from() -> impl Pass {
-    Compiler::new(swc_ecma_compiler::Config {
-        includes: Features::EXPORT_NAMESPACE_FROM,
-        ..Default::default()
-    })
+    let mut options = swc_ecma_transformer::Options::default();
+    options.env.es2020.export_namespace_from = true;
+    options.into_pass()
 }

crates/swc_ecma_compat_es2020/src/export_namespace_from.rs

@@ -156,8 +156,10 @@ where
         pass,
         /* ES2022 */ | PrivatePropertyInObject
         /* ES2021 */ | LogicalAssignmentOperators
-        /* ES2020 */ | ExportNamespaceFrom
     );
+    if !caniuse(Feature::ExportNamespaceFrom) {
+        options.env.es2020.export_namespace_from = true;
+    }
 
     // ES2020
     let pass = add!(