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README.md

pnpm dlx ts-node boop.ts --verbose

boop.ts

import "dotenv/config";
import { AutoTokenizer } from "@xenova/transformers";

package.json

{
  "name": "playground",
  "version": "1.0.0",
  "description": "",
  "dependencies": {
    "@types/node": "20.4.5",
    "@xenova/transformers": "2.4.2",
    "dotenv": "8.2.0",
    "typescript": "^5.1.6"
  },
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "engines": {
    "node": ">=18.0.0"
  },
  "type": "module",
  "keywords": [],
  "author": "",
  "license": "ISC"
}

tsconfig.json

{
  "compilerOptions": {
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "allowJs": true,
    "isolatedModules": true,
    "moduleResolution": "NodeNext",
    "module": "NodeNext",
    "preserveWatchOutput": true,
    "skipLibCheck": true,
    "noEmit": true,
    "strict": true,
    "lib": [
      "es2015",
      "dom"
    ],
    "target": "ES2015"
  },
  "ts-node": {
    "esm": true
  },
  "exclude": [
    "node_modules"
  ]
}

With:

    "moduleResolution": "Node",
    "module": "CommonJS",

ReferenceError: exports is not defined in ES module scope
    at file:///Users/tyre77/workspace/llm/ts-hub/playground/mods/boop.ts:2:23

As shown:

/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/dist-raw/node-internal-modules-esm-resolve.js:366
    throw new ERR_MODULE_NOT_FOUND(
          ^
CustomError: Cannot find module '/Users/tyre77/workspace/llm/ts-hub/playground/node_modules/dotenv/config' imported from /Users/tyre77/workspace/llm/ts-hub/playground/mods/boop.ts
    at finalizeResolution (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/dist-raw/node-internal-modules-esm-resolve.js:366:11)
    at moduleResolve (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/dist-raw/node-internal-modules-esm-resolve.js:801:10)
    at Object.defaultResolve (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/dist-raw/node-internal-modules-esm-resolve.js:912:11)
    at /Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/esm.ts:218:35
    at entrypointFallback (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/esm.ts:168:34)
    at /Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/esm.ts:217:14
    at addShortCircuitFlag (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/esm.ts:409:21)
    at resolve (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/esm.ts:197:12)
    at resolve (/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2457/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/child/child-loader.ts:15:39)
    at nextResolve (node:internal/modules/esm/loader:163:28)
 ERROR  Command failed with exit code 1: ts-node boop.ts --verbose

removing "type": "module"

/Users/tyre77/Library/pnpm/store/v3/tmp/dlx-2497/node_modules/.pnpm/ts-node@10.9.1_@types+node@20.4.5_typescript@5.1.6/node_modules/ts-node/src/index.ts:859
    return new TSError(diagnosticText, diagnosticCodes, diagnostics);
           ^
TSError: ⨯ Unable to compile TypeScript:
boop.ts:2:31 - error TS1479: The current file is a CommonJS module whose imports will produce 'require' calls; however, the referenced file is an ECMAScript module and cannot be imported with 'require'. Consider writing a dynamic 'import("@xenova/transformers")' call instead.
  To convert this file to an ECMAScript module, change its file extension to '.mts', or add the field `"type": "module"` to '/Users/tyre77/workspace/llm/ts-hub/playground/mods/package.json'.

2 import { AutoTokenizer } from "@xenova/transformers";
                                ~~~~~~~~~~~~~~~~~~~~~~

without:

  "ts-node": {
    "esm": true
  },

in tsconfig.json:

TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /Users/tyre77/workspace/llm/ts-hub/playground/mods/boop.ts