Google Sheets App Script Export to CSV selected Columns - google-apps-script

Question

I have this google sheets script which will export my current google sheet to a CSV format in my drive folder.
I tried to select column Index. Ex: columnIndex: 1,2,6,10 But without success, its still export the full data sheet
function onOpen() {
SpreadsheetApp.getUi()
.createMenu('CSV')
.addItem('Export to the file', 'userActionExportToCSV')
.addToUi();
}
// https://drive.google.com/file/d/1111111111/view?usp=sharing
var CSV_FILE_ID = '11111111111__8SC0RDV';
var SHEETID = '0';
function userActionExportToCSV() {
var res = exportToCSV_(
CSV_FILE_ID,
SpreadsheetApp.getActive().getId(),
SpreadsheetApp.getActiveSheet().getSheetId()
);
Logger.log(res);
}
var data = DriveApp.getFileById(csvId)
.getBlob()
.getDataAsString();
// Clear the Sheet
var updateCellsRequest = Sheets.newUpdateCellsRequest();
updateCellsRequest.fields = 'userEnteredValue';
updateCellsRequest.range = { sheetId: sheetId };
batchUpdateSpreadsheet_(
{
updateCells: updateCellsRequest,
},
spreadsheetId
);
var pasteDataRequest = Sheets.newPasteDataRequest();
pasteDataRequest.coordinate = {
sheetId: SpreadsheetApp.getActiveSheet().getSheetId(),
rowIndex: 0,
columnIndex: 0,
};
pasteDataRequest.data = data;
pasteDataRequest.type = SpreadsheetApp.CopyPasteType.PASTE_VALUES;
pasteDataRequest.delimiter = ',';
var batchUpdateSpreadsheetResponse = batchUpdateSpreadsheet_(
{
pasteData: pasteDataRequest,
},
spreadsheetId
);
return batchUpdateSpreadsheetResponse;
}
function exportToCSV_(csvId, spreadsheetId, sheetId) {
var url = Utilities.formatString(
'https://docs.google.com/spreadsheets/export?id=%s&exportFormat=csv&gid=%s',
spreadsheetId,
sheetId
);
var data = UrlFetchApp.fetch(url, {
headers: { Authorization: 'Bearer ' + ScriptApp.getOAuthToken() }, muteHttpExceptions: true
}).getBlob();
DriveApp.getFileById(csvId).setContent(data.getDataAsString());
}
function batchUpdateSpreadsheet_(request, spreadsheetId) {
var resource = {
requests: [],
};
resource.requests.push(request);
var batchUpdateSpreadsheetResponse = Sheets.Spreadsheets.batchUpdate(
resource,
spreadsheetId
);
return batchUpdateSpreadsheetResponse;
}
I would like to only export some selected columns. By example columns 1,2,6,10.
How I can modify this script to only export the selected columns in my CSV file saved on my Google Drive?