VS2019 错误 TS2300：重复标识符 IteratorResult

Question

我有一个 ASP.NET Core 项目，里面有 Angular App。将项目更新到 .NET Core 3.0 版本后，我遇到了一个问题。在 ASP.NET Core 项目构建期间，我在输出中看到 2 个错误：

1>------ Build started: Project: Portal, Configuration: Debug Any CPU ------
1>C:\Program Files (x86)\Microsoft SDKs\TypeScript\3.6\lib.es2015.iterable.d.ts(41,6): error TS2300: Build:Duplicate identifier 'IteratorResult'.
1>D:\Solution\MyProject\ClientApp\node_modules\@types\node\index.d.ts(73,11): error TS2300: Build:Duplicate identifier 'IteratorResult'.
1>MyProject -> D:\Solution\MyProject\bin\Debug\netcoreapp3.0\Portal.dll
1>Done building project "Portal.csproj".
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========

包.json：

{
  "name": "client-app",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "build-dev": "ng build --configuration=development"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^8.2.2",
    "@angular/cdk": "~8.1.3",
    "@angular/common": "~8.2.0-next.1",
    "@angular/compiler": "~8.2.0-next.1",
    "@angular/core": "~8.2.0-next.1",
    "@angular/forms": "~8.2.0-next.1",
    "@angular/platform-browser": "~8.2.0-next.1",
    "@angular/platform-browser-dynamic": "~8.2.0-next.1",
    "@angular/router": "~8.2.0-next.1",
    "core-js": "^2.5.4",
    "primeflex": "^1.0.0-rc.1",
    "primeicons": "^1.0.0",
    "primeng": "^8.0.1",
    "rxjs": "~6.5.2",
    "tslib": "^1.9.0",
    "zone.js": "~0.9.1"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.801.1",
    "@angular/cli": "~8.1.1",
    "@angular/compiler-cli": "~8.2.0-next.1",
    "@angular/language-service": "~8.2.0-next.1",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^5.0.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~1.1.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "3.4.5"
  }
}

tsconfig.json：

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "downlevelIteration": true,
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "esnext",
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "importHelpers": true,
    "target": "es2015",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

我试过的：

• 通过npm更新@type/node；
• 从 package.json 中删除 @type/node；
• 将打字稿（package.json 的底部）版本更改为 3.6.4。

Answer 1

我也遇到了与 Vs2019 和 angular 版本 8 完全相同的问题。我已经按照上面的建议尝试为 VS2019 下载并安装 TypesScript 编译器版本 3.7。但问题仍然存在。

解决上述问题的唯一方法是按照J King的建议升级8.10.52版本以上的节点类型。在 tsconfig.json 文件中，我将编译器目标版本设置为 ES6。然后发出以下命令：

npm install @types/node@8.10.52

然后做：

构建

确保它构建干净。在 Vs2019 中进行干净的构建。

这似乎解决了问题。