structuredClone not available on global object in nodejs app

Question

structuredClone doesn't work in my NodeJS app. When I try to use it I get the error: structuredClone is not defined nodejs.

If I create a simple file, and run:

console.log({
    globals: Object.keys(global),
    structuredClone: global.structuredClone
});

I get:

{
  globals: [
    'global',
    'clearInterval',
    'clearTimeout',
    'setInterval',
    'setTimeout',
    'queueMicrotask',
    'performance',
    'clearImmediate',
    'setImmediate'
  ],
  structuredClone: undefined
}

I've updated my node modules as per this question/answers. My package.json includes:

 "dependencies": {
    "ajv-draft-04": "^1.0.0",
    "ajv-formats": "^2.1.1",
    "aws-appsync": "^4.1.7",
    "aws-sdk": "^2.1205.0",
    "dotenv": "^16.0.2",
    "fs": "^0.0.1-security",
    "graphql-tag": "^2.12.6",
    "node-fetch": "^2.6.7"
  },
  "devDependencies": {
    "@types/jest": "^29.0.0",
    "@types/node": "^18.7.15",
    "@typescript-eslint/eslint-plugin": "^5.36.1",
    "@typescript-eslint/parser": "^5.36.1",
    "eslint": "^8.23.0",
    "jest": "^28.0.1",
    "nodemon": "^2.0.19",
    "serverless-plugin-typescript": "^2.1.2",
    "ts-jest": "^28.0.8",
    "ts-node": "^10.9.1",
    "typescript": "^4.8.2"
  }

tsconfig.json:

{
  "compilerOptions": {
    "preserveConstEnums": true,
    "strictNullChecks": true,
    "sourceMap": true,
    "allowJs": true,
    "target": "es5",
    "outDir": ".build",
    "moduleResolution": "node",
    "lib": ["es2015"],
    "rootDir": "./"
  }
}

robbash · Accepted Answer · 2022-09-09 12:41:19Z

3

I don't see why it should be available on the global object. The way I understand it is that you can use the function straight away:

const obj = structuredClone(anotherObject)

See https://developer.mozilla.org/en-US/docs/Web/API/structuredClone

Also, keep in mind that you need to run Node.js 17+.

answered Sep 9, 2022 at 12:41

robbash

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Comments

Mike · Accepted Answer · 2023-02-11 06:57:24Z

1

I had the same issue and (like robbash said) it was because I was running an old version of node.js. structuredClone() is only available from version 17. I upgraded and it works now.

edited Feb 11, 2023 at 6:57

answered Feb 11, 2023 at 6:52

Mike

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