Ng serve throwing @angular/core/core has no exported member 'eeFactoryDef'.

質問

50のようなエラーが出て、すべてangular/core/coreにはエクスポートされたメンバー'eeFactoryDef'がないということです。

それらは、たとえば、angular/cdk、ng-bootstrap、ngx-pipes、ng2-dragulaおよびいくつかの異なるnode_modulesから来るものです。私もグーグルから何も見つけられませんでした。

../node_modules/@angular/cdk/drag-drop/typings/directives/drag-handle.d.ts:23:33 - error TS2694: Namespace '"/Users/heikopiirme/Documents/realNewClient/client/node_modules/@angular/core/core"' has no exported member 'ɵɵFactoryDef'.

23     static ngFactoryDef: ɵngcc0.ɵɵFactoryDef<CdkDragHandle>;

これは私のpackage.jsonファイルです。

これは私のディペンデンシーです。

    "@angular-skyhook/core": "^1.1.1",
    "@angular-skyhook/multi-backend": "^1.1.1",
    "@angular/animations": "^8.2.6",
    "@angular/cdk": "^8.2.0",
    "@angular/common": "^8.2.6",
    "@angular/compiler": "^8.2.6",
    "@angular/core": "^8.2.6",
    "@angular/forms": "^8.2.6",
    "@angular/http": "^7.1.4",
    "@angular/material": "^8.2.0",
    "@angular/platform-browser": "^8.2.6",
    "@angular/platform-browser-dynamic": "^8.2.6",
    "@angular/router": "^8.2.6",
    "@ng-bootstrap/ng-bootstrap": "^5.1.1",
    "@ng-select/ng-select": "^3.0.7",
    "@swimlane/ngx-datatable": "^13.1.0",
    "@types/googlemaps": "^3.36.5",
    "angular2-draggable": "^2.3.1",
    "bootstrap": "^4.2.1",
    "core-js": "^2.6.1",
    "drag-drop-webkit-mobile": "^1.4.1",
    "exif-js": "^2.3.0",
    "hammerjs": "^2.0.8",
    "mobile-drag-drop": "^2.3.0-rc.2",
    "moment": "^2.24.0",
    "moment-range": "^4.0.2",
    "net": "^1.0.2",
    "ng2-dnd": "^5.0.2",
    "ng2-dragula": "^2.1.1",
    "ng2-file-upload": "^1.3.0",
    "ng2-img-max": "^2.1.18",
    "ngx-bar-rating": "^1.1.0",
    "ngx-bootstrap": "^4.3.0",
    "ngx-material-timepicker": "^5.1.0",
    "ngx-permissions": "^5.0.0",
    "ngx-pipes": "2.5.6",
    "ngx-toastr": "^10.0.4",
    "react-dnd-html5-backend": "^7.6.0",
    "rxjs": "^6.5.3",
    "sockjs-client": "^1.3.0",
    "stompjs": "^2.3.3",
    "touchscreen-dnd-shim": "^1.2.2",
    "underscore": "^1.9.1",
    "zone.js": "~0.9.1"

そして、これが私の開発用依存関係です。

"@angular-devkit/build-angular": "^0.803.4",
    "@angular/cli": "~8.3.4",
    "@angular/compiler-cli": "^8.2.6",
    "@angular/language-service": "^8.2.6",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/node": "^8.9.5",
    "codelyzer": "~5.0.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~3.1.1",
    "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",
    "node-sass": "^4.12.0",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.5.3"
  }

なぜかgoogleで情報が見つかりませんでした。

どのように解決するのですか？

いくつかのパッケージ（Angular を 8 から 9 に含む）を更新した後、再びダウングレードすると、この現象に遭遇しました。

解決策は node_modules フォルダを削除し、新たに npm をインストールすることでした。