直到今天下午，我的angular 7项目都运行良好。当我做完ng服务时，出现以下错误：node_modules/@angular/common/http/src/client.d.ts(2514,30): error TS2304: Cannot find name 'ArrayBuffer'. node_modules/@angular/common/http/src/client.d.ts(2580,30): error TS2304: Cannot find name 'Object'. node_modules/@angular/common/http/src/client.d.ts(2621,33): error TS2304: Cannot find name 'ArrayBuffer'. 一直到所有node_modules结束。我尝试删除node_module文件夹，然后“ npm install”。仍然没有用。

这是我的package.json文件

{
  "name": "cotrajectplanner2","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": "~7.2.0","@angular/common": "~7.2.0","@angular/compiler": "~7.2.0","@angular/core": "~7.2.0","@angular/forms": "~7.2.0","@angular/platform-browser": "~7.2.0","@angular/platform-browser-dynamic": "~7.2.0","@angular/router": "~7.2.0","angular-chart.js": "^1.1.1","bootstrap": "^4.4.1","chart.js": "^2.9.3","core-js": "^2.5.4","jquery": "^3.4.1","jqwidgets-ng": "^8.3.2","popper.js": "^1.16.0","router": "^1.3.3","rxjs": "~6.3.3","tslib": "^1.9.0","zone.js": "~0.8.26"
  },"devDependencies": {
    "@angular-devkit/build-angular": "~0.13.0","@angular/cli": "~7.3.3","@angular/compiler-cli": "~7.2.0","@angular/language-service": "~7.2.0","@types/jasmine": "~2.8.8","@types/jasminewd2": "~2.0.3","@types/node": "~8.9.4","codelyzer": "~4.5.0","jasmine-core": "~2.99.1","jasmine-spec-reporter": "~4.2.1","karma": "~4.0.0","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": "3.1.1"
  }
}

预先感谢

真诚的萨拉

编辑：添加了app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { LoginComponent } from './general/login/login.component';
import { RouterModule } from '@angular/router';
import { AppRoutingModule } from './app-routing.module';
import { HomeStudentComponent } from './student/home-student/home-student.component';
import { HomeTeacherComponent } from './teacher/home-teacher/home-

teacher.component';
import { StudentInfoComponent } from './student/student-info/student-info.component';
import { StudentStudyProgressComponent } from './student/student-study-progress/student-study-progress.component';
import { StudentOnmyWayToComponent } from './student/student-on-my-way-to/student-on-my-way-to.component';
import { OverviewTrajectoriesComponent } from './teacher/overview-trajectories/overview-trajectories.component';
import { OverviewCoursesComponent } from './teacher/overview-courses/overview-courses.component';
import { OverviewStudentsComponent } from './teacher/overview-students/overview-students.component';
import {HttpClientModule} from '@angular/common/http';
import { FooterComponent } from './general/footer/footer.component';
import { HeaderComponent } from './general/header/header.component';

@NgModule({
  declarations: [
    AppComponent,LoginComponent,HomeStudentComponent,HomeTeacherComponent,StudentInfoComponent,StudentStudyProgressComponent,StudentOnmyWayToComponent,OverviewTrajectoriesComponent,OverviewCoursesComponent,OverviewStudentsComponent,FooterComponent,HeaderComponent
  ],imports: [
    BrowserModule,RouterModule,AppRoutingModule,HttpClientModule
  ],providers: [],bootstrap: [AppComponent]
})
export class AppModule { }