更新Angular找不到angular-devkit

Question

我收到以下错误消息：

An unhandled exception occurred: Cannot find module '@angular/compiler-cli'
See "C:\Users\rashe\AppData\Local\Temp\ng-s9ZG05\angular-errors.log" for further details.

当我尝试使用ng serve命令运行我的Angular项目时。我试图将angular 8更新为angular 9，结果却破坏了我的项目。我尝试卸载angular，npm install @angular-devkit/build-angular，删除节点模块，删除package.json和package-lock.json，清除AppData>roaming> npm缓存和npm。我通过npm和我的文件资源管理器手动地做了很多次这些事情。我尝试在删除/重新安装之前和之后更新npm和ng更新。我总是得到相同的错误信息。我尝试的最后一件事是卸载angular 9并重新安装angular 8，但我得到了相同的消息。我认为它不依赖于版本。这是当前安装的：current angular version

当我卸载angular时，我是全局卸载的。之后，我注意到虽然我有Angular cli版本9，但在Angular下面列出的版本是8。所以，我删除/卸载了所有东西，当我检查Angular cli版本时，它是版本9，但在Angular下它是空的。我仍然有同样的错误，所以我再次删除/卸载了所有东西，并安装了Angular cli 8，目前在angular下列出的是8。我不知道这是否有帮助，但我认为我应该提到它。我的package.json文件

{
  "name": "dashborad-front-end",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~8.2.7",
    "@angular/cdk": "~8.2.2",
    "@angular/common": "~8.2.7",
    "@angular/compiler": "~8.2.7",
    "@angular/core": "~8.2.7",
    "@angular/forms": "~8.2.7",
    "@angular/material": "^8.2.2",
    "@angular/platform-browser": "~8.2.7",
    "@angular/platform-browser-dynamic": "~8.2.7",
    "@angular/router": "~8.2.7",
    "@ng-bootstrap/ng-bootstrap": "^5.1.1",
    "bootstrap": "^4.3.1",
    "font-awesome": "^4.7.0",
    "hammerjs": "^2.0.8",
    "jquery": "^3.4.1",
    "ngx-bootstrap": "^5.1.2",
    "ngx-pagination": "^4.1.0",
    "ngx-take-until-destroy": "^5.4.0",
    "popper.js": "^1.15.0",
    "rxjs": "~6.4.0",
    "tslib": "^1.10.0",
    "zone.js": "~0.10.2"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.803.5",
    "@angular/cli": "~8.3.5",
    "@angular/compiler-cli": "~8.2.7",
    "@angular/language-service": "~8.2.7",
    "@types/node": "~8.9.4",
    "@types/jasmine": "~3.3.8",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^5.0.0",
    "jasmine-core": "~3.4.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~4.1.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.1",
    "karma-jasmine": "~2.0.1",
    "karma-jasmine-html-reporter": "^1.4.0",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.15.0",
    "typescript": "~3.7.5"
  }
}

Answer 1

答案总是删除node_modules并再次安装npm。另外，我会完全清除全局，并让npm安装只在应用程序中运行。