App Script: How to view PDF of Google Sheet after

Needing users to view PDF version of the Google Sheet they have just saved to Google Drive via the function below. How do I add in a view PDF function within this code? Online suggestions are not working entirely.

function checkSheet() {
  var sheetName = "POTemplate";
  var folderID = "Eric";
  var sourceSpreadsheet = SpreadsheetApp.getActive();
  var sourceSheet = sourceSpreadsheet.getSheetByName(sheetName);
  var poNo = sourceSheet.getRange("b2").getValue();
  var pdfName = "Sample PO Hi Eric - Happy Valentine's" + poNo;
  var folder = DriveApp.getFoldersByName(folderID);
  var destSpreadsheet = SpreadsheetApp.open(DriveApp.getFileById(sourceSpreadsheet.getId()).makeCopy(folder));
  var sheets = destSpreadsheet.getSheets();
  for (i = 0; i < sheets.length; i++) {
   if (sheets[i].getSheetName() != sheetName){
     destSpreadsheet.deleteSheet(sheets[i])}};                                                                                               
  var theBlob = 
destSpreadsheet.getBlob().getAs('application/pdf').setName(pdfName);
  var newFile = folder.next().createFile(theBlob);
  DriveApp.getFileById(destSpreadsheet.getId()).setTrashed(true);
}

To add a view function you can get the link to the new file using file.getUrl() and present the link to the user in a dialog box like so

  var strUrl = newFile.getUrl()
  var html = HtmlService.createTemplateFromFile("NewTab")
  html.strUrl = strUrl
  SpreadsheetApp.getUi().showModelessDialog(html.evaluate(), "Pdf Link")

You Html file NewTab will be coded like so

<!DOCTYPE html>
<html>
  <head>
    <base target="_top">
  </head>
  <body>
    <a href ="<?!= strUrl ?>"> Link </a> to your PDF File
  </body>
  <script>
    var evLink = document.getElementsByTagName('a')[0]
    //evLink.click();  //If you try to programmatically activate link,
    // pop-up blocker stops the link from opening.
   </script>
</html>

Reference:
file.getUrl()
Dialog box
SO query on opening new tab/link