typescript source code of app.module

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

import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatSidenavModule } from '@angular/material/sidenav';
import { HTTP_INTERCEPTORS, HttpClientModule } from '@angular/common/http';
import { MatSnackBar } from '@angular/material/snack-bar';
import { Overlay } from '@angular/cdk/overlay';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { IndexModule } from './pages/index/index.module';
import { ViewModule } from './pages/view/view.module';
import { ErrorService } from './services/error.service';
import { ErrorInterceptor } from './helpers/error.interceptor';

@NgModule({
    declarations: [AppComponent],
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        AppRoutingModule,
        IndexModule,
        ViewModule,
        MatSidenavModule,
        HttpClientModule,
    ],
    providers: [
        { provide: HTTP_INTERCEPTORS, useClass: ErrorInterceptor, multi: true },
        ErrorService,
        MatSnackBar,
        Overlay,
    ],
    bootstrap: [AppComponent],
})
export class AppModule {}