How to handle null values ?

Is theire a way to handle null values. {{date | amTimeAgo}} displays invalide date if date is null how customize that to something like --

[melgish]

Why not copy the logic of the standard angular pipes when it comes to null values… https://github.com/angular/angular/blob/master/packages/common/src/pipes/date_pipe.ts

transform(value: any, format = 'mediumDate', timezone?: string, locale?: string): string|null {
    if (value == null || value === '' || value !== value) return null;

    try {
      return formatDate(value, format, locale || this.locale, timezone);
    } catch (error) {
      throw invalidPipeArgumentError(DatePipe, error.message);
    }
  }

[RouR]

{{someItem.dueToUtc ? (someItem.dueToUtc | amFromUtc | amLocal | amDateFormat:'LL') : 'your message'}}