Method transform

packages/common/src/pipes/case_conversion_pipes.ts:118–122

(value: string | null | undefined)

  transform(value: null | undefined): null;
  transform(value: string | null | undefined): string | null;
  transform(value: string | null | undefined): string | null {
    if (value == null) return null;
    assertPipeArgument(UpperCasePipe, value);
    return value.toUpperCase();
  }
}

function assertPipeArgument(pipe: Type<any>, value: Object): void {