TypeScript error: Duplicate identifier 'LibraryManagedAttributes'

Question

Failed to compile.

/moonholdings.io/node_modules/@types/react-dom/node_modules/@types/react/index.d.ts (2312,14): Duplicate identifier 'LibraryManagedAttributes'.

Not sure why I'm getting this.

I've downgraded my "@types/node" from 10 to 8 and that didn't work. Also tried "@types/node": "^9.6.7"

My Repo: https://github.com/Futuratum/moonholdings.io

My package.json

{
  "name": "moonholdings.io",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "build-css": "node-sass-chokidar src/ -o src/ --source-map",
    "watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive --source-map",
    "start": "react-scripts-ts start",
    "build": "react-scripts-ts build",
    "test": "react-scripts-ts test --env=jsdom",
    "eject": "react-scripts-ts eject"
  },
  "dependencies": {
    "@types/react": "^16.4.14",
    "@types/react-redux": "^6.0.9",
    "node-sass-chokidar": "^1.3.3",
    "react": "^16.5.0",
    "react-dom": "^16.5.0",
    "react-redux": "^5.0.7",
    "react-router-dom": "^4.3.1",
    "react-scripts-ts": "2.17.0",
    "redux-thunk": "^2.3.0"
  },
  "devDependencies": {
    "@types/jest": "^23.3.2",
    "@types/node": "^8.10.29",
    "@types/react-dom": "^16.0.7",
    "typescript": "^3.0.3"
  }
}

Here is my tsconfig

    {
  "compilerOptions": {
    "traceResolution": false,
    "strictNullChecks": true,
    "noImplicitAny": true,
    "module": "esnext",
    "target": "es5",
    "lib": [
      "es2015",
      "es2017",
      "es6",
      "es7",
      "es5",
      "dom"
    ],
    "jsx": "react",
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "baseUrl": "./src",
    "noUnusedLocals": true,
    "noUnusedParameters": false,
    "noImplicitAny": false,
    "allowSyntheticDefaultImports": true,
    "importHelpers": true,
    "strictFunctionTypes": false
  },
  "include": [
    "src/**/*",
    "webpack/**/*"
  ],
  "files": [
    "core.ts",
    "sys.ts",
    "types.ts",
    "tsc.ts",
    "registerServiceWorker.ts",
    "src/registerServiceWorker.ts",
    "src/setupTests.ts"
  ],
  "exclude": [
    "typings/browser.d.ts",
    "typings/browser",
    "typings",
    "node_modules",
    "build",
    "scripts",
    "acceptance-tests",
    "webpack",
    "jest"
  ]
}

So now you have node_modules/@types/react-dom/node_modules/@types/react/index.d.ts and node_modules/@types/react/index.d.ts? I think your project type dependencies must match your transitive types dependencies. — zerkms
– zerkms, Commented Sep 13, 2018 at 23:39
@zerkms Ok so I removed the React types, and now getting other strange errors.... — Leon Gaban
– Leon Gaban, Commented Sep 13, 2018 at 23:46
Also the answers in that question haven't helped so far :( but still digging in. — Leon Gaban
– Leon Gaban, Commented Sep 13, 2018 at 23:55

Dimitar Nikovski · Accepted Answer · 2019-10-28 13:24:47Z

9

You may find that the duplicates are located in node_modules/@types/react and node_modules/types/react-dom/@types/react or a similar set-up, in which one of the packages has a nested dependency on the other.

Uninstalling and reinstalling @types/react-dom and @types/react together is what fixed it for me.

yarn remove @types/react-dom @types/react


yarn add -D @types/react-dom @types/react

edited Oct 28, 2019 at 13:24

answered Jan 17, 2019 at 15:47

Dimitar Nikovski

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1 Comment

Mayur Dhurpate Over a year ago

Thank you so much! Tried so many different tricks form here: stackoverflow.com/questions/52399839/… but this worked perfectly.

Leon Gaban · Accepted Answer · 2018-09-16 16:32:32Z

1

I'm still not sure what caused that bug, however I've checked out a much earlier version of my app, where it was stable. So going to continue work from there.

Here is the working package.json

{
  "name": "moonholdings.io",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "start": "react-scripts-ts start",
    "build": "react-scripts-ts build",
    "test": "react-scripts-ts test --env=jsdom",
    "eject": "react-scripts-ts eject"
  },
  "dependencies": {
    "@types/jest": "^23.3.1",
    "@types/node": "^10.9.4",
    "@types/react": "^16.4.13",
    "@types/react-dom": "^16.0.7",
    "react": "^16.4.2",
    "react-dom": "^16.4.2",
    "react-ts-with-scss": "2.1.0",
    "typescript": "^3.0.3"
  },
  "devDependencies": {}
}

answered Sep 16, 2018 at 16:32

Leon Gaban

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2 Comments

Spenhouet Over a year ago

That didn't solve the problem for me. I would guess if you delete your node_modules folder and do a fresh yarn install and yarn build the error will reappear. I found another workaround: stackoverflow.com/questions/52399839/…

Eduard Jacko Over a year ago

Why did you accept your own answer? Its not a real solution.

dumazy · Accepted Answer · 2022-03-09 12:35:21Z

0

I had the same error. I upgraded @types/react and @types/react-dom to their latest versions in package.json and it fixed my error.

edited Mar 9, 2022 at 12:35

answered Dec 17, 2018 at 10:58

dumazy

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3 Comments

Joey Gough Over a year ago

is it not because typescript code is only for development. Once it is transpiled for deployment it is javascript so types are no longer neccessary? Are types not always menat to be dev deps

shallow.alchemy Over a year ago

types should only be in your devDeps

dumazy Over a year ago

Thanks @shallow.alchemy to clarify this. It makes sense, I guess, since types don't matter at runtime anymore. I'll keep an eye out for this if I'll pick up TS again

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