Google Apps Script function to replace text in Google Slides with Google Sheet values

Google App Script - Replace Slide Content Using Google Sheet Data.js

/**
 * Function to replace text in Google Slides with Google Sheet values
 * @reference https://hudsonatwell.co/2020/10/03/how-to-use-google-slides-to-autogenerate-featured-images/
 */
function generate_featured_image() {
  
  /* get spreadsheet from public view link */
  var dataSpreadsheetUrl = "https://docs.google.com/spreadsheets/d/1necmbNPUsGJ3fwNiFpgNLbtH6c2RmJDwIQCPuhAfA7s/edit"; //make sure this includes the '/edit at the end
  var ss = SpreadsheetApp.openByUrl(dataSpreadsheetUrl);
  
  /* load active slide deck */
  var deck = SlidesApp.getActivePresentation();
  
  /* load google sheet tab from spreadsheet */
  var sheet = ss.getSheetByName('Sheet1');    
  
  /* get cell values from sheet */
  var title = sheet.getRange('A2').getValue();     /* get title from cell A2 */
  var subtitle = sheet.getRange('B2').getValue();  /* get subtitle from cell B2 */
  var category = sheet.getRange('C2').getValue();  /* get category from cell C2 */
  var excerpt = sheet.getRange('D2').getValue();   /* get excerpt from cell D2 */
  var slides = deck.getSlides();
  
  /* log our variables just in case we need to check the apps script logs */
  Logger.log(ss)
  Logger.log(sheet)
  Logger.log(title)
  Logger.log(subtitle)
  Logger.log(category)
  Logger.log(excerpt)
  
  /* loop through slide deck slides and replace tokens with variable values */
  slides.forEach(function(slide){
     var shapes = (slide.getShapes());
     shapes.forEach(function(shape){
       shape.getText().replaceAllText('{{title}}',title);
       shape.getText().replaceAllText('{{subtitle}}',subtitle);
       shape.getText().replaceAllText('{{category}}',category);
       shape.getText().replaceAllText('{{excerpt}}',excerpt);
     }); 
   })
}