Как создать эффект marquee без использования тега <marquee> (с помощью CSS, JavaScript и jQuery)

Source Code: (back to article)

<!DOCTYPE html>
<html>
  <head>
    <title>Заголовок документа</title>
    <style>
      body {
      font-family: sans-serif;
      font-weight: 700;
      height: 600vh;
      background: #d66d75;
      background: linear-gradient(to top, #fbc2eb 0%, #a6c1ee 100%);
      }
      .marquee {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      }
      .marquee .inner {
      position: relative;
      width: 100%;
      display: flex;
      color: white;
      font-size: 8rem;
      }
      .marquee .inner > * {
      white-space: nowrap;
      padding: 0 4rem;
      }
    </style>
  </head>
  <body>
    <div class="marquee">
      <div class="inner">
        <p>Привет всем.</p>
      </div>
    </div>
    <script>
      function handleMarquee(){
      	const marquee = document.querySelectorAll('.marquee');
      	let speed = 4;
      	let lastScrollPos = 0;
      	let timer;
      	
      	marquee.forEach(function(el){
      		const container = el.querySelector('.inner');
      		const content = el.querySelector('.inner > *');
      		//Get total width
      		const  elWidth = content.offsetWidth;
      		
      		
      		//Duplicate content
      		let clone = content.cloneNode(true);
      		container.appendChild(clone);
      		
      		let progress = 1;
      		function loop(){
      			progress = progress-speed;
      			if(progress <= elWidth*-1) {progress=0;}
      			container.style.transform = 'translateX(' + progress + 'px)';
      			container.style.transform += 'skewX(' + speed*0.4 + 'deg)';
      			
      			window.requestAnimationFrame(loop);
      		}
      		loop();
      	});
      	
      	window.addEventListener('scroll', function(){
      		const maxScrollValue = 12;
      		const newScrollPos = window.scrollY;
      		let scrollValue = newScrollPos - lastScrollPos;
      		
      		
      		if( scrollValue > maxScrollValue ) scrollValue = maxScrollValue;
          else if( scrollValue < -maxScrollValue ) scrollValue = -maxScrollValue;
      		
      		speed = scrollValue;
      		
      		clearTimeout(timer);
          timer = setTimeout(handleSpeedClear, 10);
      	});
      	
      	function handleSpeedClear(){
      		speed = 4;
      	}
      };
      
      handleMarquee();
    </script>
  </body>
</html>