def write_data_set(file_path, dataset, output_dir, color_array_info, new_name=None, compress=True):
    """write dataset to vtkjs"""
    fileName = new_name if new_name else os.path.basename(file_path)
    dataset_dir = os.path.join(output_dir, fileName)
    data_dir = os.path.join(dataset_dir, 'data')

    if not os.path.exists(data_dir):
        os.makedirs(data_dir)

    root = {}
    root['metadata'] = {}
    root['metadata']['name'] = fileName

    writer = writer_mapping[dataset.GetClassName()]
    if writer:
        writer(dataset_dir, data_dir, dataset, color_array_info, root, compress)
    else:
        print(dataObject.GetClassName(), 'is not supported')

    with open(os.path.join(dataset_dir, "index.json"), 'w') as f:
        f.write(json.dumps(root, indent=2))

    return dataset_dir
write dataset to vtkjs