Script export and send email of custom sheet on PDF for Google Sheets with GAS

ExportAndEmailCustomSheetsAsPDF.gs

//https://gist.github.com/chemiadel/bee4cb03481b580275d5296a3e7adc0d

function EmailPDF() {
  //Get Active Spreadsheet
  var spreadSheet=SpreadsheetApp.getActiveSpreadsheet();
  
  //Get All Sheets of the spreadsheets
  var sheets=spreadSheet.getSheets();
  
  //Sheet wanted to export on PDF
  var wantedSheets=['Sheet1','Sheet2'];
  
  //Save defaults hidden sheets
  var arr=new Array();
  for(var i in sheets){
            if(sheets[i].isSheetHidden()){
            arr.push(sheets[i].getSheetName());
          }
    }
    
  //Hide All sheets except one from wantedsheets you can't hide all sheets
  for(var j in sheets){
            if(!sheets[j].isSheetHidden() && sheets[j].getSheetName()!=wantedSheets[0]){
            sheets[j].hideSheet();
          }
    }
  
  //Show Wanted sheets
  for(var k in wantedSheets){
            spreadSheet.getSheetByName(wantedSheets[k]).showSheet();
    }
    
  //Export URL with Parameters
  var spreadSheetId = spreadSheet.getId();
  var URL = "https://docs.google.com/spreadsheets/d/"+spreadSheetId+"/export"+
                                                        "?format=pdf&"+
                                                        "size=0&"+
                                                        "fzr=true&"+
                                                        "portrait=true&"+
                                                        "fitw=true&"+
                                                        "gridlines=true&"+
                                                        "printtitle=true&"+
                                                        "sheetnames=true&"+
                                                        "pagenum=CENTER&"+
                                                        "attachment=true"; 
   //the HTTP method for the request: get and headers : authorization : Bearer tokens to access OAuth 2.0-protected resources
   var params = {method:"GET",headers:{"authorization":"Bearer "+ ScriptApp.getOAuthToken()}};
   
   //Return the data inside this object as a blob.
   var response=UrlFetchApp.fetch(URL,params).getBlob();
   
   //Email it
   MailApp.sendEmail('To', 'Title', 'Body', {
        attachments: [{
            fileName: "FileTitle" + ".pdf",
            content: response.getBytes(),
            mimeType: "application/pdf"
        }]
    });
    
    //Reshow all sheets
    for(var x in sheets){
        if(sheets[x].isSheetHidden()){
        sheets[x].showSheet();
        }
    }    
        
    //Rehide default sheets    
    for(var y in arr){
        spreadSheet.getSheetByName(arr[y]).hideSheet();
    }
}