definma-ui/src/app/exists.pipe.ts

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

@Pipe({
	name: 'exists',
	pure: true
})
export class ExistsPipe implements PipeTransform {

	transform(value: unknown, key?): unknown {
		return value || value === 0 ? (key ? value[key] : value) : '';
	}

}