Angularでpipeを使って日付データをフォーマットする

import { IonicModule } from '@ionic/angular';
import { RouterModule } from '@angular/router';
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { Tab3Page } from './tab3.page';
import { ExploreContainerComponentModule } from '../explore-container/explore-container.module';
+import { DatePipe } from '@angular/common';

import { Tab3PageRoutingModule } from './tab3-routing.module';

@NgModule({
  imports: [
    IonicModule,
    CommonModule,
    FormsModule,
    ExploreContainerComponentModule,
    RouterModule.forChild([{ path: '', component: Tab3Page }]),
    Tab3PageRoutingModule,
  ],
-  declarations: [Tab3Page]
+  declarations: [Tab3Page],
+  providers: [DatePipe]
})
export class Tab3PageModule {}

import { Component,ElementRef,ViewChild } from '@angular/core';
+import { DatePipe } from '@angular/common';

@Component({
  selector: 'app-tab3',
  templateUrl: 'tab3.page.html',
  styleUrls: ['tab3.page.scss']
})
export class Tab3Page {

  constructor(
+    private datePipe: DatePipe
  ) {
  }

  ionViewDidEnter(){
  }

}

import { Component,ElementRef,ViewChild } from '@angular/core';
import { DatePipe } from '@angular/common';

@Component({
  selector: 'app-tab3',
  templateUrl: 'tab3.page.html',
  styleUrls: ['tab3.page.scss']
})
export class Tab3Page {
+  time_on_html:any;
  constructor(
    private datePipe: DatePipe
  ) {
  }

  ionViewDidEnter(){
+    this.time_on_html = new Date();
+    console.log(this.time_on_html);
  }

}

import { Component,ElementRef,ViewChild } from '@angular/core';
import { DatePipe } from '@angular/common';

@Component({
  selector: 'app-tab3',
  templateUrl: 'tab3.page.html',
  styleUrls: ['tab3.page.scss']
})
export class Tab3Page {
  time_on_html:any;
  constructor(
    private datePipe: DatePipe
  ) {
  }

  ionViewDidEnter(){
    this.time_on_html = this.datePipe.transform(new Date(), 'yyyyMMddHHmmss');
    console.log(this.time_on_html);

  }

}