moment.jsを使った日付Pipeのサンプル実装

mydate.pipe.ts

import { Pipe, PipeTransform } from '@angular/core';
import * as moment from 'moment';

@Pipe({
  name: 'mydate'
})
export class MyDatePipe implements PipeTransform {
  transform(value: any, format?: string) {
    if (value === null || value === undefined) {
      return '';
    }

    if (!format) {
      format = 'YYYY/MM/DD';
    }

    const d = moment(value);

    return d.isValid() ? d.format(format) : '';
  }
}