Google Sheet Script to download - google-apps-script

Question

excuse my bad English.
I have a main Google Sheet that export that from other sheets to fill the information. This action depends on the number in a cell, then I would download the PDF of the sheet. But the name would automatically be the sheet's name. Is there a script I could use so that the name of the pdf file would be one of the data on a specific cell?
I would gladly appreciate the help. This is so I could get this done more quickly since there are so many people.
I tried to follow some code from another thread: [https://stackoverflow.com/questions/56215898/how-to-download-single-sheet-as-pdf-not-export-to-google-drive]
And ended up with something like this:
function onOpen() {
var submenu = [{name:"Save PDF", functionName:"generatePdf"}];
SpreadsheetApp.getActiveSpreadsheet().addMenu('Export', submenu);
}
function generatePdf() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheetId = ss.getActiveSheet().getSheetId();
var valor = SpreadsheetApp.getActiveSheet().getRange('G2').getValue();
var filename = valor;
// Creat PDF file as a temporary file and create URL for downloading.
var url = "https://docs.google.com/a/mydomain.org/spreadsheets/d/" + ss.getId() + "/export?exportFormat=pdf&gid=" + sheetId + "&access_token=" + ScriptApp.getOAuthToken();
var blob = UrlFetchApp.fetch(url).getBlob().setName(filename);
var file = DriveApp.createFile(blob);
var dlUrl = "https://drive.google.com/uc?export=download&id=" + file.getId();
// Open a dialog and run Javascript for downloading the file.
var str = '<script>window.location.href="' + dlUrl + '"</script>';
var html = HtmlService.createHtmlOutput(str);
SpreadsheetApp.getUi().showModalDialog(html, "sample");
file.setTrashed(true);
// This is used for closing the dialog.
Utilities.sleep(3000);
var closeHtml = HtmlService.createHtmlOutput("<script>google.script.host.close()</script>");
SpreadsheetApp.getUi().showModalDialog(closeHtml, "sample");
}
Didn't work, just maybe one time after so many tries.
Then I tried this: https://gist.github.com/primaryobjects/6370689c6f5fd3799ea53f89551eced7
But the PDF that exports have the cell's lines in the background... So, it doesn't look good.
Is there a way for the export to use the pdf download method, so it looks clean, but automatically put the name of the pdf from a cell value?