extend a pipe like currency or number on a custom pipe on angular2

Question

I would like to call the numberPipe on my custom pipe I find this answer

Angular2 use basic pipe in custom pipe

but I this solution don't work for me. I have an error "The pipe 'bigInteger' could not be found"

import { Pipe, PipeTransform } from "@angular/core"
import { CurrencyPipe  } from "@angular/common"

@Pipe({
 name: "bigInteger"
 })
 export class BigInteger extends CurrencyPipe implements PipeTransform {
   transform(value: any): string {
    return value
 }
}

Answer 1

Maybe obsolete, but this worked for me (Angular 5):

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

@Pipe({
  name: 'bigInteger'
})
export class BigInteger extends DecimalPipe implements PipeTransform {
  transform(value: any, args?: any): any {

    let result;
    result = super.transform(value, args);

    //any transformations you need

    return result;
  }

}

Then you just use it like regular number pipe, but can customize as you wish:

<span>{{someValue | bigInteger : '1.2-2'}}</span>