fix

src/index.ts

@@ -672,6 +672,15 @@ export function create(rawOptions: CreateOptions = {}): Service {
     });
   }
 
+  /**
+   * True if require() hooks should interop with experimental ESM loader.
+   * Enabled explicitly via a flag since it is a breaking change.
+   */
+  let experimentalEsmLoader = false;
+  function enableExperimentalEsmLoaderInterop() {
+    experimentalEsmLoader = true;
+  }
+
   // Install source map support and read from memory cache.
   installSourceMapSupport();
   function installSourceMapSupport() {
@@ -1254,15 +1263,6 @@ export function create(rawOptions: CreateOptions = {}): Service {
     });
   }
 
-  /**
-   * True if require() hooks should interop with experimental ESM loader.
-   * Enabled explicitly via a flag since it is a breaking change.
-   */
-  let experimentalEsmLoader = false;
-  function enableExperimentalEsmLoaderInterop() {
-    experimentalEsmLoader = true;
-  }
-
   return {
     [TS_NODE_SERVICE_BRAND]: true,
     ts,

src/repl.ts

@@ -371,10 +371,7 @@ export function createRepl(options: CreateReplOptions = {}) {
             !name.includes('/') &&
             !['console', 'module', 'process'].includes(name)
         )
-        .map(
-          (name) =>
-            `declare const ${name}: typeof import('${name}');declare import ${name} = require('${name}')`
-        )
+        .map((name) => `declare import ${name} = require('${name}')`)
         .join(';')}\n`;
     }
 

src/test/helpers.ts

@@ -40,6 +40,8 @@ export const CMD_ESM_LOADER_WITHOUT_PROJECT = `node ${EXPERIMENTAL_MODULES_FLAG}
 // `createRequire` does not exist on older node versions
 export const testsDirRequire = createRequire(join(TEST_DIR, 'index.js'));
 
+export const ts = testsDirRequire('typescript');
+
 export const xfs = new NodeFS(fs);
 
 /** Pass to `test.context()` to get access to the ts-node API under test */

src/test/index.spec.ts

@@ -3,7 +3,7 @@ import * as expect from 'expect';
 import { join, resolve, sep as pathSep } from 'path';
 import { tmpdir } from 'os';
 import semver = require('semver');
-import ts = require('typescript');
+import { ts } from './helpers';
 import { lstatSync, mkdtempSync } from 'fs';
 import { npath } from '@yarnpkg/fslib';
 import type _createRequire from 'create-require';

src/test/repl/node-repl-tla.ts

@@ -2,7 +2,7 @@ import { expect } from 'chai';
 import type { Key } from 'readline';
 import { Stream } from 'stream';
 import semver = require('semver');
-import ts = require('typescript');
+import { ts } from '../helpers';
 import type { ContextWithTsNodeUnderTest } from './helpers';
 
 interface SharedObjects extends ContextWithTsNodeUnderTest {

src/test/repl/repl.spec.ts

@@ -1,4 +1,4 @@
-import ts = require('typescript');
+import { ts } from '../helpers';
 import semver = require('semver');
 import * as expect from 'expect';
 import {
@@ -414,7 +414,7 @@ test.suite(
 
 test.serial('REPL declares types for node built-ins within REPL', async (t) => {
   const { stdout, stderr } = await t.context.executeInRepl(
-    `util.promisify(setTimeout)("should not be a string")
+    `util.promisify(setTimeout)("should not be a string" as string)
     type Duplex = stream.Duplex
     const s = stream
     'done'`,