How to extend a pipe in Angular

Question

Can someone exlpain me with the code ans example that How to extend a pipe in Angular?

Answer 1

In Angular, you cannot directly extend a pipe using inheritance like you would with classes. However, you can achieve similar functionality by creating a new pipe and reusing the logic from an existing pipe.

Example:

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

import { DatePipe } from '@angular/common';

@Pipe({

  name: 'extendedDatePipe'

})

export class ExtendedDatePipe implements PipeTransform {

  constructor(private datePipe: DatePipe) {}

  transform(value: Date, format: string = 'mediumDate'): string {

    const formattedDate = this.datePipe.transform(value, format);

    return `Formatted Date: ${formattedDate}`;

  }

}

Usage in Template:

<p>{{ currentDate | extendedDatePipe:'fullDate' }}</p>

<!-- Output: Formatted Date: Monday, January 1, 2023 -->