Export Google Sheets to PDF without cell gridlines - google-apps-script

Question

I'm trying to export PDF from Google Sheets via Apps Script. I've found useful code online, which works perfectly, except I can't find a way to export it without the grid, or change margins and page size.
function generatePdf() {
var originalSpreadsheet = SpreadsheetApp.getActive();
var sourcesheet = originalSpreadsheet.getSheetByName("TestSheet");
var sourcerange = sourcesheet.getRange('B1:K55'); // range to get - here I get all of columns which i want
var sourcevalues = sourcerange.getValues();
var data = sourcesheet.getDataRange().getValues();
var number = originalSpreadsheet.getRange('G9:H9').getValue();
var newSpreadsheet = SpreadsheetApp.create("Invoice pdf"); // can give any name.
var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var projectname = SpreadsheetApp.getActiveSpreadsheet();
var sheet = sourcesheet.copyTo(newSpreadsheet);
var destrange = sheet.getRange('B1:K55');
destrange.setValues(sourcevalues);
newSpreadsheet.getSheetByName('Sheet1').activate();
newSpreadsheet.deleteActiveSheet();
var invoiceName = "Invoice "+number;
var pdf = DriveApp.getFileById(newSpreadsheet.getId());
var theBlob = pdf.getBlob().getAs('application/pdf').setName(invoiceName);
var folderID = "1Y7n1e_tzQWvzVykHJf_DSm9lBVmokDHA"; // Folder id to save in a folder.
var folder = DriveApp.getFolderById(folderID);
var newFile = folder.createFile(theBlob);
DriveApp.getFileById(newSpreadsheet.getId()).setTrashed(true);
}
I've been looking for answers everywhere, but I cannot apply some of the solutions I find to my code.

Answer 1

I'm not sure how to do it with the code, but if you want to do it without code... when downloading from Google Sheets, you have the option to remove the cell gridlines. Here are the directions:
File > Download > PDF Document (.pdf)
This will open a preview screen. Sidebar on the right has a dropdown menu called "Formatting."
Under "Formatting," uncheck the box labeled "Show gridlines."
Thats it!

Answer 2

It’s not possible to pass options into the getAs function, but you can export the file yourself and download the URL:
function getPdf(spreadsheet) {
var options = {
format: 'pdf',
exportFormat: 'pdf',
size: 7, // A4
portrait: true,
gridlines: false,
};
// construct export URL
var query = Object.keys(options).map(function (key) {
return encodeURIComponent(key) + '=' + encodeURIComponent(options[key]);
}).join('&');
var exportUrl = spreadsheet.getUrl().replace(/\/edit.*$/, '/export?' + query);
var response = UrlFetchApp.fetch(exportUrl, {
headers: {
Authorization: 'Bearer ' + ScriptApp.getOAuthToken(),
},
});
return {
fileName: spreadsheet.getName() + '.pdf',
content: response.getBlob().getBytes(),
mimeType: MimeType.PDF,
};
}
The full list of export options can be found at https://stackoverflow.com/a/46312255.