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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

!
Insecure Resource

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CSS

About CSS Preprocessors

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

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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HTML 

              
                <section id="section1">
	<div class="content blue"><h2>Section 1</h2></div>
	<div class="content"></div>
	<div class="content"></div>
	<div class="content"></div>
</section>

<section id="section2">
	<div class="content red"><h2>Section 2</h2></div>
	<div class="content"></div>
	<div class="content"></div>
	<div class="content"></div>
</section>

<section id="section3">
	<div class="content blue"><h2>Section 3</h2></div>
	<div class="content">test content</div>
	<div class="content"></div>
	<div class="content"></div>
</section>

<section id="section4">
	<div class="content red"><h2>Section 4</h2></div>
	<div class="content"></div>
	<div class="content"></div>
	<div class="content"></div>
</section>

    
<div class="anchors">
  <span data-link="#section1">Anchor 1</span>
  <span data-link="#section2">Anchor 2</span>
  <span data-link="#section3">Anchor 3</span>
  <span data-link="#section4">Anchor 4</span> 
</div>
!

CSS 

              
                @import url('https://fonts.googleapis.com/css?family=Signika+Negative:300,400&display=swap');

html {
  margin: 0;
}

body { 
  font-family: "Signika Negative", sans-serif; 
  font-weight: 300;
  margin: 0;
  padding: 0 20px;
}

section {
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.content {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
}

h2 {
  font-size: 60px;
  color: #fff;
}

.blue {
  background-color: blue;
}

.red {
  background-color: red;
}

.square {
  width: 100px;
  height: 100px;
  background-color: black;
}

.anchors {
  position: fixed;
  top: 50%;
  right: 40px;
  display: flex;
  flex-direction: column;
  transform: translateY(-50%);
  
  span {
    display: block;
    color: #fff;
    padding: 20px;
    cursor: pointer;
  }
}
!

JS 

              
                gsap.registerPlugin(ScrollTrigger, ScrollToPlugin);

let sections = gsap.utils.toArray("section");
sections.forEach(section => {
  gsap.to(section.querySelector("h2"), {
    rotation: 360,
    ease: "none",
    scrollTrigger: {
      trigger: section,
      pin: true,
      scrub: 1,
      onUpdate: killWhenFast,
      end: () => "+=" + window.innerHeight * sections.length
    }
  });
});

// when the scroll velocity is more than 2500px/second, skip the smooth scrubbing
function killWhenFast(self) {
  let tween = self.getTween();
  tween && Math.abs(self.getVelocity()) > 2500 && tween.progress(1);
}


gsap.utils.toArray(".anchors [data-link]").forEach(el => {
  el.addEventListener("click", event => {
    gsap.to(window, {scrollTo: event.target.getAttribute("data-link")});
  });
});







// if disabled is true, don't allow the ScrollTrigger's animation to render at any progress other than 0 or 1.
// function checkDisabled(self) {
//   if (disabled) {
//     let tween = self.getTween();
//     tween && tween.progress(1); // in case there's a scrub attached
//     self.animation.progress(self.progress === 1 ? 1 : 0);
//   }
// }
!
999px

Console