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

Question

Im getting like 50 errors that all say that angular/core/core has no exported member 'eeFactoryDef'.

They come from different node_modules, for example angular/cdk, ng-bootstrap, ngx-pipes, ng2-dragula and some more. I didn't find anything from google either.

../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>; 

This is my package.json file:

Here are my depencencies:

    "@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" 

And here are my dev dependencies:

"@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"   } 

Couldn't find any information on google for some reason.

Answer 1

I ran into this after updating some packages (including Angular from 8 to 9), then downgrading again.

The solution was to nuke the node_modules folder and then do a fresh npm install.