capitalisePipe.ts

capitalisePipe.ts

import {Pipe, PipeTransform} from '@angular/core';
@Pipe({
  name: 'capitalise'
})
export class CapitalisePipe implements PipeTransform {
  transform(value: string): string {
    if (typeof value !== 'string') {
      throw new Error('Requires a String as input');
    }
    return value.toUpperCase();
  }
}