Node 23 support for Typescript and Webstorm

SANDIP CHITALE

创建于 2025年01月27日 06:26

With index.mts:

const response = await fetch('https://jsonplaceholder.typicode.com/todos/1');
const json = await response.json();
console.log(JSON.stringify(json, null, 2));

and package.json:

{
  "name": "typescript",
  "version": "1.0.0",
  "description": "",
  "main": "index.mts",
  "tyep": "module",
  "scripts": {
    "start": "node index.mts"
  },
  "private": true
}

Node version:


> node --version                                                                                      
v23.6.1

Webstrom shows squigglies under the await with error:

TS1378: Top-level await expressions are only allowed when the module option is set to es2022, esnext, system, node16, nodenext, or preserve, and the target option is set to es2017 or higher.

But the code runs just fine:

> node index.mts                                                                                      25-01-26 10:24PM
(node:4642) ExperimentalWarning: Type Stripping is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
{
  "userId": 1,
  "id": 1,
  "title": "delectus aut autem",
  "completed": false
}

Is this a bug or do I need to do some additional config?

3 条评论

Elena Pogorelova

创建于 2025年01月27日 08:06

Do you have the tsconfig.json in your project? What is a result of running tsc in your app root?

SANDIP CHITALE

创建于 2025年01月27日 20:30

Hi Elena,

The whole point of new direct Typescript support in Node is that you do not need to use tsconfig.json explicitly.

But yes, after adding this tsconfig.json I do not see the error:

{
  "compilerOptions": {
    "module": "NodeNext",  // or "Node16", "ESNext"
    "target": "ES2022",   // must be ES2017 or higher
  }
}

Elena Pogorelova

创建于 2025年01月28日 07:58

The Typescript compiler still uses the commonjs “module” and ES5 “target”by default, regardless of the Node.js interpreter being used. You will see the same errors when running `tsc` in terminal unless the options are specified explicitly either in the tsconfig.json or in the command line.

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