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Jetbrains WebStormで"type": "module"指定されたnodejsプロジェクトをtsーnodeでデバッグする方法

Posted at

割とはまり込んだので、後刻の備忘録として

想定

プロジェクトのフォルダ構成は以下の通り

root:
│  package-lock.json
│  package.json
│  tsconfig.json
│
├─.idea
|  ...
│
└─src
        index.ts

Package.jsonは以下の通り

{
  "name": "untitled",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "ts-node": "^10.9.2",
    "typescript": "^5.3.3"
  }
}

普通にtsconfig.jsonをこさえると以下のようになる

{
  "compilerOptions": {
    "target": "es2016",
    "module": "commonjs",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "strict": true,
    "skipLibCheck": true
  }
}

これだとmoduleがcommonjsなので、ここをnode16nodennextにする。

書き換えた後は以下

{
  "compilerOptions": {
    "target": "es2020",
    "module": "Node16",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "strict": true,
    "skipLibCheck": true
  }
}

Run/Debug Confの調整

index.tsを実行したいとする場合、

JavaScript fileにsrc/index.tsを指定する。加えてNode parameterに
--import "data:text/javascript,import { register } from 'node:module'; import { pathToFileURL } from 'node:url'; register('ts-node/esm', pathToFileURL('./'));"
を指定する。

こうすることで、Execute/Debugが可能になる。

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