无法在TypeScript.2.7中找到名称“TextDecoder”

Question

我正在创建一个Range6应用程序(使用TypeScript 2.7)，并希望使用TextDecoder本机函数。当我运行ng build --aot时，我会收到错误: error TS2304:无法找到名称'TextDecoder‘。

任何帮助都将不胜感激。下面是我的tsconfig.json文件和package.json文件中的包列表。

谢谢，鲍勃

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  }
}

  "dependencies": {
    "@angular/animations": "^6.0.5",
    "@angular/cdk": "^6.2.1",
    "@angular/common": "^6.0.3",
    "@angular/compiler": "^6.0.3",
    "@angular/core": "^6.0.3",
    "@angular/forms": "^6.0.3",
    "@angular/http": "^6.0.3",
    "@angular/material": "^6.2.1",
    "@angular/platform-browser": "^6.0.3",
    "@angular/platform-browser-dynamic": "^6.0.3",
    "@angular/router": "^6.0.3",
    "bootstrap": "^4.1.1",
    "core-js": "^2.5.4",
    "hammerjs": "^2.0.8",
    "npm": "^6.1.0",
    "rxjs": "^6.0.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.8",
    "@angular/cli": "~6.0.8",
    "@angular/compiler-cli": "^6.0.3",
    "@angular/language-service": "^6.0.3",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^10.5.7",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.3.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

Answer 1

TextDecoder的声明只出现在TypeScript 2.8和更新版本中。您需要升级TypeScript或将相关声明从这里复制到您的项目中。

Answer 2

您需要将输出包的设置更改为ES7。转到src/tsconfig.app.json &添加到compilerOptions：

"compilerOptions": {
    "lib": [
        "es2017",
        "dom"
    ]
}

Answer 3

将它写在component.ts的顶部:用于角5或早期

declare var TextDecoder: any

为我解决打字稿- 2.5.x的问题

见TS2304:找不到名称‘require’上的帖子