Require typescript file after ts-node.register doesn't work in ESM

[Fernando9995]

Steps to reproduce the problem

index.mjs

import { dirname, resolve } from "path";
import { createRequire } from "module";
import tsnode from "ts-node";

const require = createRequire(import.meta.url);
const __dirname = dirname(decodeURI(new URL(import.meta.url).pathname)).replace(/^\/([A-Za-z]):\//, "$1:/");

tsnode.register({
  project: resolve(__dirname, "tsconfig.json"),
});

(() => {
  const res = require("./file.ts");
  res.init();
})();

Actual Behavior

Uncaught exception: Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: ./file.ts require() of ES modules is not supported. require() of ./main.ts from ./index.mjs is an ES module file as it is a .ts file whose nearest parent package.json contains "type": "module" which defines all .ts files in that package scope as ES modules. Instead change the requiring code to use import(), or remove "type": "module" from ./package.json.

Expected Behavior

There are no such error if start file from cmd

node --loader ts-node/esm --inspect ./file.ts

Specifications

• ts-node version: v10.9.1
• node version: v16.19.0
• TypeScript version: v5.0.3
• tsconfig.json, if you're using one:

{
  "compilerOptions": {
    "outDir": "_dist",
    "target": "ESNext",
    "module": "ESNext",
    "moduleResolution": "node16",
    "esModuleInterop": true
  },
  "ts-node": {
    "esm": true,
    "transpileOnly": true
  },
  "include": ["."]
}

• package.json:

{
  "type": "module"
}

• Operating system and version: Windows 10 22H2
• If Windows, are you using WSL or WSL2?: WSL2

[JoshuaKGoldberg]

I'm also getting this on Node 20.19.0. Which is very unfortunate given that require(ESM) is natively supported in that version.

Isolated minimum reproduction: https://github.com/JoshuaKGoldberg/repros/tree/ts-node-err-require-esm-node-20

Internally, it looks like ts-node is throwing its own error that intentionally matches its error code to the Node.js "ERR_REQUIRE_ESM" constant.