How to use the file-saver/FileSaver.saveAs function in file-saver

} else if (selection == 'marked') {
      d = config.marked;
    } else if (selection == 'both') {
      d = config.selections();
    } else {
      throw "Please specify one of {'brushed', 'marked', 'both'}";
    }

    if (d.length > 0) {
      // format data as csv
      // NOTE: include assigned data id number?
      const csv = csvFormat(d, config.vars);

      // create url and download
      const file = new Blob([csv], { type: 'text/csv' });
      saveAs(file, filename);
    } else {
      throw 'Error: No data selected.';
    }
    return this;
  };

function*() {
      const data = yield callApi(api.export);
      saveAs(data, "TruBudget_Export.xlsx");
      yield put({
        type: EXPORT_DATA_SUCCESS
      });
    },
    true,

runExport(value: Array) {
    this.update(value);
    if (this.properties.length === 0) {
      this.notificationService.error('There are no properties to export.');
    } else {
      const propertiesText = this.properties.join('\n');
      const date = DateTime.local().toFormat('yyyy-MM-HHmmss');
      const filename = `${this.refConfig.id}_${date}.txt`;
      const blob = new Blob([propertiesText], { type: 'text/plain' });
      saveAs(blob, filename);
    }
  }

private createDownload(csvContent: string[]) {
    const file = new Blob(csvContent, {type: 'text/csv'});
    saveAs(file, this.course.name.replace(/\s/g, '') + 'Report.csv');
  }
}

export(rows, options) {
        let headers = (options && options.headers) ||
            (Object.keys((rows[0] || {})).sort());
        let filename = (options && options.filename) || "export.csv";
        let csvText = new CSV(rows, { header: headers }).encode();
        let blob = new Blob([csvText], { type: "text/csv" });
        saveAs(blob, filename);
    }
}

        response => saveAs(new Blob([JSON.stringify(response)], {type: 'text/plain;charset=utf-8'}),
          'Classifications_' + TaskanaDate.getDate() + '.json')
      );

canvas.toBlob((blob) => {
                    saveAs(blob, filename);
                    resetExport();
                });
            }

fileDownloadDeck() {
      const fileData = convertDeckToFile(this.deckparts, this.deck.list);
      const file = new File([fileData], `${this.deck.name}.ydk`, {
        type: "text/ydk"
      });

      return FileSaver.saveAs(file);
    },
    copyShareText() {

visualizer.encodeVideo().then((blob) => {
            this.recording = false;
            if (this.game && this.game.game_id) {
              saveAs(blob, `${this.game.game_id}.webm`);
            }
            else {
              saveAs(blob, 'video.webm');
            }
          });
        }