Method transform

packages/common/src/pipes/slice_pipe.ts:79–93

(
    value: ReadonlyArray<T> | string | null | undefined,
    start: number,
    end?: number,
  )

  transform(value: string, start: number, end?: number): string;
  transform(value: string | null | undefined, start: number, end?: number): string | null;
  transform<T>(
    value: ReadonlyArray<T> | string | null | undefined,
    start: number,
    end?: number,
  ): Array<T> | string | null {
    if (value == null) return null;

    const supports = typeof value === 'string' || Array.isArray(value);

    if (!supports) {
      throw invalidPipeArgumentError(SlicePipe, value);
    }

    return value.slice(start, end);
  }
}