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HTML

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About the <head>

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!
Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript

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Babel includes JSX processing.

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Packages

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HTML 

              
                <div style="height:100vh; width: 100%; background-color: magenta" >
  A DIV ON TOP OF THE CAROUSEL
</div>
<section class="description panel blue">
  <div>
    <h1>Layered pinning</h1>
    <p>Use pinning to layer panels on top of each other as you scroll.</p>
    <div class="scroll-down">Scroll down<div class="arrow"></div></div>
  </div>
</section>


<section class="panel red">
	ONE
</section>
<section class="panel orange">
	TWO
</section>
<section class="panel purple">
	THREE
</section>
<section class="panel green">
	FOUR
</section>

<div style="height:100vh; width: 100%; background-color: magenta" >
  A DIV ON BOTTOM OF THE CAROUSEL
</div>



<header>
   <a href="https://greensock.com/scrolltrigger">
     <img class="greensock-icon" src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/16327/scroll-trigger-logo-light.svg" width="200" height="64" />
  </a> 
</header>
!

CSS 

              
                html, body { height: auto; }
.panel {
  height: 100vh;
/*   position: sticky; */ /* causes problems! */
  top: 0;
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger, ScrollToPlugin);

let panels = gsap.utils.toArray(".panel"),
    observer = ScrollTrigger.normalizeScroll(true),
    scrollTween;

// on touch devices, ignore touchstart events if there's an in-progress tween so that touch-scrolling doesn't interrupt and make it wonky
document.addEventListener("touchstart", e => {
  if (scrollTween) {
    e.preventDefault();
    e.stopImmediatePropagation();
  }
}, {capture: true, passive: false})

function goToSection(i) {
  scrollTween = gsap.to(window, {
    scrollTo: {y: i * innerHeight, autoKill: false},
    onStart: () => {
      observer.disable(); // for touch devices, as soon as we start forcing scroll it should stop any current touch-scrolling, so we just disable() and enable() the normalizeScroll observer
      observer.enable();
    },
    duration: 1,
    onComplete: () => scrollTween = null,
    overwrite: true
  });
}

panels.forEach((panel, i) => {
  ScrollTrigger.create({
    trigger: panel,
    start: "top top",
    end: "+=199%",
    onToggle: self => self.isActive && !scrollTween && goToSection(i)
  });
});

// just in case the user forces the scroll to an inbetween spot (like a momentum scroll on a Mac that ends AFTER the scrollTo tween finishes):
!
999px

Console