Encountered the "Error TS2300: Duplicate identifier 'Account'" issue following the upgrade to Typescript version 2.9.1

Since upgrading to Typescript 2.9.1 (from 2.8), I encountered a compile error:

node_modules/typescript/lib/lib.es2017.full.d.ts:33:11 - error TS2300: Duplicate identifier 'Account'.

This issue never occurred when I was using typescript 2.7 and 2.8.

Current Environment:

  • Operating System: MacOS 10.13.5
  • Node.js Version: v9.11.1
  • NPM Version: 6.1.0
  • Typescript Version Installed Locally: 2.9.1 (no global installation)
// tsconfig.json
{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es2017",
    "noImplicitAny": true,
    "moduleResolution": "node",
    "sourceMap": true,
    "outDir": "ts-build",
    "baseUrl": ".",
    "paths": {
      "kernel/*": [
        "./server/kernel/*"
      ]
    },
    "rootDir": ".",
    "allowJs": true,
    "typeRoots": [
      "node_modules/@types"
    ],
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "types": [],
    "keyofStringsOnly": true
  },
  "include": [
    "server/**/*",
    "app.*.js"
  ],
  "exclude": [
    "node_modules"
  ]
}

Answer №1

As a temporary solution, I have implemented skipLibCheck: true to avoid the type checking in library files and prevent any errors. However, the reason behind this occurrence in version 2.9.1 remains unclear.

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