format-title-page.html

<style>
    .hide {
      display: none !important;
    }
  </style>
  
  
  <script>
    function remove() {
      let footer = document.querySelector('div.footer');
      let slideNo = document.querySelector('div.slide-number');
      let slideLogo = document.querySelector('img.slide-logo.r-stretch'); 
      slideNo.classList.add('hide');
      footer.classList.add('hide');
      slideLogo.classList.add('hide');
    
      Reveal.on('slidechanged', event => {  
        if(Reveal.isFirstSlide()) {
          slideNo.classList.add('hide');
          footer.classList.add('hide');
          slideLogo.classList.add('hide');
        } else {
          slideNo.classList.remove('hide');
          footer.classList.remove('hide');
          slideLogo.classList.remove('hide');
        }
      });
    }
    
    window.onload = remove();
  </script>