为什么我遇到这些Typescript编译时错误？

Question

I dont have any idea why these errors are appearing, while I copied the whole ClientApp folder from running application where these are not there.

My structure of project is ;

Here is my package.json :

{
  "name": "crossvertise-calander-system",
  "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": "^7.1.0",
    "@angular/cdk": "^7.1.0",
    "@angular/common": "^7.1.0",
    "@angular/compiler": "^7.1.0",
    "@angular/core": "^7.1.0",
    "@angular/forms": "^7.1.0",
    "@angular/material": "^7.1.0",
    "@angular/platform-browser": "^7.1.0",
    "@angular/platform-browser-dynamic": "^7.1.0",
    "@angular/router": "^7.1.0",
    "core-js": "^2.5.7",
    "rxjs": "^6.3.3",
    "saturn-datepicker": "^7.0.1",
    "@angular/http": "7.1.4",
    "@ng-bootstrap/ng-bootstrap": "4.0.1",
    "bootstrap": "4.1.3",
    "hammerjs": "^2.0.8",
    "jquery": "^3.3.1",
    "md-date-range-picker": "^0.8.3",
    "ng2-daterange-picker": "^1.1.0",
    "ngx-mat-daterange-picker": "0.0.2",
    "rxjs-compat": "^6.3.3",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.26",
    "@mat-datetimepicker/core": "3.0.0-beta.0",
    "@mat-datetimepicker/moment": "3.0.0-beta.0"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.11.0",
    "@angular/cli": "~7.1.3",
    "@angular/compiler-cli": "~7.1.0",
    "@angular/language-service": "~7.1.0",
    "@types/jasmine": "~2.8.8",
    "@types/jasminewd2": "~2.0.3",
    "@types/jquery": "^3.3.27",
    "@types/node": "~8.9.4",
    "codelyzer": "~4.5.0",
    "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",
    "protractor": "~5.4.0",
    "ts-node": "~7.0.0",
    "tslint": "~5.11.0",
    "typescript": "~3.1.6"
  }
}

Can any body help me how to get rid of these errors. I dont know how to avoid these errors. These are really slowing down my development

Answer 1

Follow the below steps:

• Delete your node_modules folder and package-lock.json file if it exists
• Run npm install command

If this, still doesn't fix your problem, then in your spec.ts file, add the below import:

import {} from 'jasmine';