module: fix typescript import.meta.main

PR-URL: #58661
Backport-PR-URL: #58693Fixes: #58660
Reviewed-By: Xuguang Mei <meixuguang@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Ethan Arrowood <ethan@arrowood.dev>
Reviewed-By: Pietro Marchini <pietro.marchini94@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>

Author: marco-ippolito

lib/internal/modules/esm/translators.js

@@ -511,17 +511,17 @@ translators.set('wasm', async function(url, source) {
 });
 
 // Strategy for loading a commonjs TypeScript module
-translators.set('commonjs-typescript',function(url,source){
+translators.set('commonjs-typescript',function(url,source,isMain){
 assertBufferSource(source,true,'load');
 constcode=stripTypeScriptModuleTypes(stringify(source),url);
 debug(`Translating TypeScript ${url}`);
-returnFunctionPrototypeCall(translators.get('commonjs'),this,url,code,false);
+returnFunctionPrototypeCall(translators.get('commonjs'),this,url,code,isMain);
 });
 
 // Strategy for loading an esm TypeScript module
-translators.set('module-typescript',function(url,source){
+translators.set('module-typescript',function(url,source,isMain){
 assertBufferSource(source,true,'load');
 constcode=stripTypeScriptModuleTypes(stringify(source),url);
 debug(`Translating TypeScript ${url}`);
-returnFunctionPrototypeCall(translators.get('module'),this,url,code,false);
+returnFunctionPrototypeCall(translators.get('module'),this,url,code,isMain);
 });

test/es-module/test-esm-import-meta-main-eval.mjs

@@ -3,17 +3,6 @@ import * as fixtures from '../common/fixtures.js';
 importassertfrom'node:assert/strict';
 import{describe,it}from'node:test';
 
-constimportMetaMainScript=`
-import assert from 'node:assert/strict';
-
-assert.strictEqual(import.meta.main, true, 'import.meta.main should evaluate true in main module');
-
-const { isMain: importedModuleIsMain } = await import(
-${JSON.stringify(fixtures.fileURL('es-modules/import-meta-main.mjs'))}
-);
-assert.strictEqual(importedModuleIsMain, false, 'import.meta.main should evaluate false in imported module');
-`;
-
 functionwrapScriptInEvalWorker(script){
 return`
  import { Worker } from 'node:worker_threads';
@@ -33,6 +22,17 @@ function wrapScriptInUrlWorker(script) {
 }
 
 describe('import.meta.main in evaluated scripts',()=>{
+constimportMetaMainScript=`
+import assert from 'node:assert/strict';
+
+assert.strictEqual(import.meta.main, true, 'import.meta.main should evaluate true in main module');
+
+const { isMain: importedModuleIsMain } = await import(
+${JSON.stringify(fixtures.fileURL('es-modules/import-meta-main.mjs'))}
+);
+assert.strictEqual(importedModuleIsMain, false, 'import.meta.main should evaluate false in imported module');
+`;
+
 it('should evaluate true in evaluated script',async()=>{
 constresult=awaitspawnPromisified(
 process.execPath,
@@ -72,3 +72,65 @@ describe('import.meta.main in evaluated scripts', () => {
 });
 });
 });
+
+describe('import.meta.main in typescript scripts',()=>{
+constimportMetaMainTSScript=`
+import assert from 'node:assert/strict';
+
+assert.strictEqual(import.meta.main, true, 'import.meta.main should evaluate true in main module');
+
+const { isMain: importedModuleIsMain } = await import(
+${JSON.stringify(fixtures.fileURL('es-modules/import-meta-main.ts'))}
+);
+assert.strictEqual(importedModuleIsMain, false, 'import.meta.main should evaluate false in imported module');
+`;
+
+it('should evaluate true in evaluated script',async()=>{
+constresult=awaitspawnPromisified(
+process.execPath,
+['--experimental-strip-types',
+'--input-type=module-typescript',
+'--disable-warning=ExperimentalWarning',
+'--eval',importMetaMainTSScript],
+);
+assert.deepStrictEqual(result,{
+stderr: '',
+stdout: '',
+code: 0,
+signal: null,
+});
+});
+
+it('should evaluate true in worker instantiated with module source by evaluated script',async()=>{
+constresult=awaitspawnPromisified(
+process.execPath,
+['--experimental-strip-types',
+'--input-type=module-typescript',
+'--disable-warning=ExperimentalWarning',
+'--eval',wrapScriptInEvalWorker(importMetaMainTSScript)],
+);
+assert.deepStrictEqual(result,{
+stderr: '',
+stdout: '',
+code: 0,
+signal: null,
+});
+});
+
+it('should evaluate true in worker instantiated with `data:` URL by evaluated script',async()=>{
+constresult=awaitspawnPromisified(
+process.execPath,
+['--input-type=module',
+'--experimental-strip-types',
+'--input-type=module-typescript',
+'--disable-warning=ExperimentalWarning',
+'--eval',wrapScriptInUrlWorker(importMetaMainTSScript)],
+);
+assert.deepStrictEqual(result,{
+stderr: '',
+stdout: '',
+code: 0,
+signal: null,
+});
+});
+});

test/fixtures/es-modules/import-meta-main.ts

@@ -0,0 +1 @@
+exportconstisMain=import.meta.main;