node_modules/@auth0/angular-jwt/lib/jwtoptions.token.d.ts2,50中的错误：错误TS2304：找不到名称“未知”

如何解决node_modules/@auth0/angular-jwt/lib/jwtoptions.token.d.ts2,50中的错误：错误TS2304：找不到名称“未知”

在编译我的角度项目时，出现以下错误。我删除了node_modules文件，然后重新安装仍然无法正常工作。

node_modules/@auth0/angular-jwt/lib/jwtoptions.token.d.ts（2,50）中的错误：错误TS2304：找不到名称“未知”。

package.json

{
  "name": "ArinhureWeb","version": "0.0.0","scripts": {
    "ng": "ng","start": "ng serve","build": "ng build","build:ssr": "ng run ArinhureWeb:server:dev","test": "ng test","lint": "ng lint","e2e": "ng e2e"
  },"private": true,"dependencies": {
    "@angular/animations": "6.1.10","@angular/common": "6.1.10","@angular/compiler": "6.1.10","@angular/core": "6.1.10","@angular/forms": "6.1.10","@angular/http": "6.1.10","@angular/platform-browser": "6.1.10","@angular/platform-browser-dynamic": "6.1.10","@angular/platform-server": "6.1.10","@angular/router": "6.1.10","@auth0/angular-jwt": "^5.0.1","@nguniversal/module-map-ngfactory-loader": "6.0.0","aspnet-prerendering": "^3.0.1","bootstrap": "^4.1.3","chart.js": "^2.9.3","core-js": "^2.5.4","jquery": "3.3.1","popper.js": "^1.14.3","rxjs": "6.0.0","zone.js": "^0.8.26"
  },"devDependencies": {
    "@angular-devkit/build-angular": "~0.6.0","@angular/cli": "~6.0.0","@angular/compiler-cli": "6.1.10","@angular/language-service": "^6.0.0","@types/jasmine": "~2.8.6","@types/jasminewd2": "~2.0.3","@types/node": "~8.9.4","codelyzer": "~4.2.1","jasmine-core": "~2.99.1","jasmine-spec-reporter": "~4.2.1","karma": "^3.0.0","karma-chrome-launcher": "~2.2.0","karma-coverage-istanbul-reporter": "~1.4.2","karma-jasmine": "~1.1.1","karma-jasmine-html-reporter": "^0.2.2","typescript": "~2.7.2"
  },"optionalDependencies": {
    "node-sass": "^4.9.3","protractor": "~5.4.0","ts-node": "~5.0.1","tslint": "~5.9.1"
  }
}

解决方法

我遇到了这个问题并找到了解决方案。在查看documentation说“对于Angular v6 +到v9，使用@ auth0 / angular-jwt v4”之后，我当前正在运行Angular 6，并安装了4.2版。我遇到了同样的错误：

失败：Microsoft.AspNetCore.SpaServices [0] node_modules/@auth0/angular-jwt/lib/jwtoptions.token.d.ts（2,50）：错误TS2304：找不到名称“未知”。

我在node_modules中打开了jwtoptions.token.d.ts文件，它是一个简单的两行文件：

import { InjectionToken } from '@angular/core';
export declare const JWT_OPTIONS: InjectionToken<unknown>;

“未知”是在打字稿3中引入的新类型，而Angular 6.0.9依赖于打字稿〜2.7。此外，从此npm警告可以看到，@ auth0 / angular-jwt依赖项的4.2版本以Angular 7.1+为目标。

npm WARN @ auth0 / angular-jwt @ 4.2.0需要一个对等体@ angular / common @> = 7.1.0，但未安装。您必须自己安装对等依赖项。

我认为此程序包遇到支持Angular较旧版本的问题。我只是降级到版本@ auth0 / angular-jwt @ 3.0.1，不再有错误。

这是我的package.json：

  "dependencies": {
    "@angular/animations": "6.0.9","@angular/cdk": "^6.4.7","@angular/common": "6.0.9","@angular/compiler": "6.0.9","@angular/core": "6.0.9","@angular/forms": "6.0.9","@angular/http": "6.0.9","@angular/material": "^6.4.7","@angular/platform-browser": "6.0.9","@angular/platform-browser-dynamic": "6.0.9","@angular/router": "6.0.9","@auth0/angular-jwt": "3.0.1","@ng-idle/core": "^6.0.0-beta.3","@ng-idle/keepalive": "^6.0.0-beta.3","angular2-moment": "^1.9.0","bootstrap": "3.3.2","bootstrap-tree": "1.2.0","chart.js": "2.0.2","core-js": "2.4.1","font-awesome": "4.7.0","formvalidation": "0.6.2-dev","jquery": "1.11.2","jquery-match-height": "0.7.2","jquery-sparkline": "2.3.2","jstree": "3.3.4","ngx-bootstrap": "3.0.1","noty": "2.4.1","pdfmake-client": "1.0.0","primeicons": "1.0.0-beta.9","primeng": "6.0.0","rxjs": "6.0.0","rxjs-compat": "6.2.2","sortablejs": "1.6.0","webpack": "^4.4.0","zone.js": "0.8.26"
  },"devDependencies": {
    "@angular/cli": "6.1.4","@angular/compiler-cli": "6.0.9","@angular/language-service": "6.0.9","@angular-devkit/build-angular": "0.6.7","@angular-devkit/core": "0.5.11","@types/jasmine": "2.8.3","@types/jasminewd2": "2.0.2","@types/node": "6.0.60","codelyzer": "4.0.1","jasmine-core": "2.8.0","jasmine-spec-reporter": "4.2.1","karma": "2.0.0","karma-chrome-launcher": "2.2.0","karma-cli": "1.0.1","karma-coverage-istanbul-reporter": "1.2.1","karma-jasmine": "1.1.0","karma-jasmine-html-reporter": "0.2.2","protractor": "5.1.2","ts-node": "3.2.0","tslint": "5.9.1","typescript": "2.7.2"
  },