From 670d0ea56302fdd17f6486599f5de98f989d459f Mon Sep 17 00:00:00 2001
From: isaacs <i@izs.me>
Date: Thu, 7 Sep 2023 14:51:11 -0700
Subject: [PATCH] remove swc experimental options

This removes support for keeping import assertions, which were broken in
swc at some point, and unconditionally transpiled into import
attributes. (Ie, `import/with` instead of `import/assert`.)

No version of node supports import attributes with this syntax yet, so
anyone using swc to import json in ESM is out of luck no matter what.

And swc 1.3.83 broke the option that ts-node was using. The position of
the swc project is that experimental features are not supported, and may
change in patch versions without warning, making them unsafe to rely on
(as evidenced here, and the reason why this behavior changed
unexpectedly in the first place).

Better to just not use experimental swc features, and let it remove
import assertions rather than transpile them into something that node
can't run.

Fix: https://github.com/TypeStrong/ts-node/issues/2056
---
 src/test/transpilers.spec.ts | 19 -------------------
 src/transpilers/swc.ts       |  3 ---
 2 files changed, 22 deletions(-)

diff --git a/src/test/transpilers.spec.ts b/src/test/transpilers.spec.ts
index d11c368bf..185d92ce8 100644
--- a/src/test/transpilers.spec.ts
+++ b/src/test/transpilers.spec.ts
@@ -120,23 +120,4 @@ test.suite('swc', (test) => {
       );
     });
   });
-
-  test.suite('preserves import assertions for json imports', (test) => {
-    test.if(tsSupportsImportAssertions);
-    test(
-      'basic json import',
-      compileMacro,
-      { module: 'esnext' },
-      outdent`
-        import document from './document.json' assert {type: 'json'};
-        document;
-      `,
-      outdent`
-        import document from './document.json' assert {
-            type: 'json'
-        };
-        document;
-      `
-    );
-  });
 });
diff --git a/src/transpilers/swc.ts b/src/transpilers/swc.ts
index 16868cad2..9b438d59b 100644
--- a/src/transpilers/swc.ts
+++ b/src/transpilers/swc.ts
@@ -235,9 +235,6 @@ export function createSwcOptions(
           },
         },
         keepClassNames,
-        experimental: {
-          keepImportAssertions: true,
-        },
       },
     };