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HTML

About HTML Preprocessors

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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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

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.

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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.

Learn more · Versions

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-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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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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You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it. If it's using a matching preprocessor, we'll combine the code before preprocessing, so you can use the linked Pen as a true dependency.

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HTML 

              
                <section class="hero">
	<div class="wrap">
		<h2>Hero</h2>
		<ul class="menu">
			<li><a href="#section-1">Section 1</a></li>
			<li><a href="#section-2">Section 2</a></li>
			<li><a href="#section-3">Section 3</a></li>
			<li><a href="#section-4">Section 4</a></li>
			<li><a href="#section-5">Section 5</a></li>
			<li><a href="#section-6">Section 6</a></li>
		</ul>
	</div>
</section>

<main class="sections">
	<h1 class="sections__title">Services</h1>
	<section class="section-1" id="section-1">
		<div class="wrap">
			<div class="container">
				<h2>Section 1</h2>
			</div>
		</div>
	</section>
	<section class="section-2" id="section-2">
		<div class="wrap">

			<div class="container">
				<h2>Section 2</h2>
				<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto ullam optio veniam numquam totam perferendis
					consectetur libero maiores dignissimos asperiores animi odio nisi, quod quidem distinctio sint culpa fugit
					dolores expedita quisquam excepturi reprehenderit assumenda. Temporibus adipisci, odit facere laborum
					deserunt
					necessitatibus, incidunt dignissimos aperiam obcaecati consequatur aliquam praesentium modi quae voluptate
					et
					voluptates libero eveniet facilis alias veritatis consectetur ducimus accusamus itaque. Quod minus eaque
					sint.
					Quo quia dolorem, corrupti vero dolor suscipit. Assumenda sunt vitae, expedita debitis nemo quam totam
					praesentium ab exercitationem voluptate, nulla ex quia saepe. Quis magni, cum suscipit alias sint velit ea
					inventore. Nam?</p>
				<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto ullam optio veniam numquam totam perferendis
					consectetur libero maiores dignissimos asperiores animi odio nisi, quod quidem distinctio sint culpa fugit
					dolores expedita quisquam excepturi reprehenderit assumenda. Temporibus adipisci, odit facere laborum
					deserunt
					necessitatibus, incidunt dignissimos aperiam obcaecati consequatur aliquam praesentium modi quae voluptate
					et
					voluptates libero eveniet facilis alias veritatis consectetur ducimus accusamus itaque. Quod minus eaque
					sint.
					Quo quia dolorem, corrupti vero dolor suscipit. Assumenda sunt vitae, expedita debitis nemo quam totam
					praesentium ab exercitationem voluptate, nulla ex quia saepe. Quis magni, cum suscipit alias sint velit ea
					inventore. Nam?</p>
			</div>
		</div>
	</section>
	<section class="section-3" id="section-3">
		<div class="wrap">

			<div class="container">
				<h2>Section 3</h2>
				<div class="items">
					<div class="item">
						<div class="item__title">Item 1</div>
						<div class="item__text">
							Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae quo incidunt autem hic animi similique
							itaque impedit eveniet at repellendus!
						</div>
					</div>
					<div class="item">
						<div class="item__title">Item 2</div>
						<div class="item__text">
							Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae quo incidunt autem hic animi similique
							itaque impedit eveniet at repellendus! Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae
							quo incidunt autem hic animi similique itaque impedit eveniet at repellendus!
						</div>
					</div>
					<div class="item">
						<div class="item__title">Item 3</div>
						<div class="item__text">
							Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae quo incidunt autem hic animi similique
							itaque impedit eveniet at repellendus!
						</div>
					</div>
					<div class="item">
						<div class="item__title">Item 4</div>
						<div class="item__text">
							Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae quo incidunt autem hic animi similique
							itaque impedit eveniet at repellendus! Lorem ipsum dolor sit amet consectetur adipisicing elit.
							Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
							perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
							<!-- Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
								Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
								Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
								Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
								Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at.
								Laudantium, autem! Quaerat, neque voluptatibus. Similique odit rem, velit adipisci quisquam repudiandae
								perferendis? Ratione natus sed voluptate explicabo quibusdam architecto, dignissimos at. -->
						</div>
					</div>
					<div class="item">
						<div class="item__title">Item 5</div>
						<div class="item__text">
							Lorem ipsum dolor sit, amet consectetur adipisicing elit. Beatae quo incidunt autem hic animi similique
							itaque impedit eveniet at repellendus!
						</div>
					</div>
				</div>
			</div>
		</div>
	</section>
	<section class="section-4" id="section-4">
		<div class="wrap">

			<div class="container">
				<h2>Section 4</h2>
			</div>
		</div>
	</section>
	<section class="section-5" id="section-5">
		<div class="wrap">

			<div class="container">
				<h2>Section 5</h2>
				<div class="box">
					<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Cupiditate cumque minus dolorem eligendi itaque
						magnam excepturi modi, nemo tempore. Quidem sunt enim dolorum ea nihil. Id accusamus nulla velit
						voluptatum
						dolorum quae ad praesentium harum maxime doloremque excepturi debitis magni sed asperiores beatae,
						corporis
						quod veritatis est minima vitae nisi enim iure illo. Optio accusantium ipsum aperiam nam quam ut obcaecati
						similique, harum, neque ea id at voluptatibus quia repellat dicta rem architecto maiores deleniti
						repellendus, fugit voluptas accusamus? Ea aut doloremque animi nesciunt, quam omnis ex quis, dignissimos
						error quasi iste, porro asperiores quibusdam ut perferendis exercitationem tenetur vel?</p>
					<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Cupiditate cumque minus dolorem eligendi itaque
						magnam excepturi modi, nemo tempore. Quidem sunt enim dolorum ea nihil. Id accusamus nulla velit
						voluptatum
						dolorum quae ad praesentium harum maxime doloremque excepturi debitis magni sed asperiores beatae,
						corporis
						quod veritatis est minima vitae nisi enim iure illo. Optio accusantium ipsum aperiam nam quam ut obcaecati
						similique, harum, neque ea id at voluptatibus quia repellat dicta rem architecto maiores deleniti
						repellendus, fugit voluptas accusamus? Ea aut doloremque animi nesciunt, quam omnis ex quis, dignissimos
						error quasi iste, porro asperiores quibusdam ut perferendis exercitationem tenetur vel?</p>
					<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Cupiditate cumque minus dolorem eligendi itaque
						magnam excepturi modi, nemo tempore. Quidem sunt enim dolorum ea nihil. Id accusamus nulla velit
						voluptatum
						dolorum quae ad praesentium harum maxime doloremque excepturi debitis magni sed asperiores beatae,
						corporis
						quod veritatis est minima vitae nisi enim iure illo. Optio accusantium ipsum aperiam nam quam ut obcaecati
						similique, harum, neque ea id at voluptatibus quia repellat dicta rem architecto maiores deleniti
						repellendus, fugit voluptas accusamus? Ea aut doloremque animi nesciunt, quam omnis ex quis, dignissimos
						error quasi iste, porro asperiores quibusdam ut perferendis exercitationem tenetur vel?</p>
					<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Cupiditate cumque minus dolorem eligendi itaque
						magnam excepturi modi, nemo tempore. Quidem sunt enim dolorum ea nihil. Id accusamus nulla velit
						voluptatum
						dolorum quae ad praesentium harum maxime doloremque excepturi debitis magni sed asperiores beatae,
						corporis
						quod veritatis est minima vitae nisi enim iure illo. Optio accusantium ipsum aperiam nam quam ut obcaecati
						similique, harum, neque ea id at voluptatibus quia repellat dicta rem architecto maiores deleniti
						repellendus, fugit voluptas accusamus? Ea aut doloremque animi nesciunt, quam omnis ex quis, dignissimos
						error quasi iste, porro asperiores quibusdam ut perferendis exercitationem tenetur vel?</p>
					<p>Lorem ipsum, dolor sit amet consectetur adipisicing elit. Cupiditate cumque minus dolorem eligendi itaque
						magnam excepturi modi, nemo tempore. Quidem sunt enim dolorum ea nihil. Id accusamus nulla velit
						voluptatum
						dolorum quae ad praesentium harum maxime doloremque excepturi debitis magni sed asperiores beatae,
						corporis
						quod veritatis est minima vitae nisi enim iure illo. Optio accusantium ipsum aperiam nam quam ut obcaecati
						similique, harum, neque ea id at voluptatibus quia repellat dicta rem architecto maiores deleniti
						repellendus, fugit voluptas accusamus? Ea aut doloremque animi nesciunt, quam omnis ex quis, dignissimos
						error quasi iste, porro asperiores quibusdam ut perferendis exercitationem tenetur vel?</p>
				</div>
			</div>
		</div>
	</section>
	<section class="section-6" id="section-6">
		<div class="wrap">

			<div class="container">
				<h2>Section 6</h2>
				<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto ullam optio veniam numquam totam perferendis
					consectetur libero maiores dignissimos asperiores animi odio nisi, quod quidem distinctio sint culpa fugit
					dolores expedita quisquam excepturi reprehenderit assumenda. Temporibus adipisci, odit facere laborum
					deserunt
					necessitatibus, incidunt dignissimos aperiam obcaecati consequatur aliquam praesentium modi quae voluptate
					et
					voluptates libero eveniet facilis alias veritatis consectetur ducimus accusamus itaque. Quod minus eaque
					sint.
					Quo quia dolorem, corrupti vero dolor suscipit. Assumenda sunt vitae, expedita debitis nemo quam totam
					praesentium ab exercitationem voluptate, nulla ex quia saepe. Quis magni, cum suscipit alias sint velit ea
					inventore. Nam?</p>
				<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto ullam optio veniam numquam totam perferendis
					consectetur libero maiores dignissimos asperiores animi odio nisi, quod quidem distinctio sint culpa fugit
					dolores expedita quisquam excepturi reprehenderit assumenda. Temporibus adipisci, odit facere laborum
					deserunt
					necessitatibus, incidunt dignissimos aperiam obcaecati consequatur aliquam praesentium modi quae voluptate
					et
					voluptates libero eveniet facilis alias veritatis consectetur ducimus accusamus itaque. Quod minus eaque
					sint.
					Quo quia dolorem, corrupti vero dolor suscipit. Assumenda sunt vitae, expedita debitis nemo quam totam
					praesentium ab exercitationem voluptate, nulla ex quia saepe. Quis magni, cum suscipit alias sint velit ea
					inventore. Nam?</p>
				<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto ullam optio veniam numquam totam perferendis
					consectetur libero maiores dignissimos asperiores animi odio nisi, quod quidem distinctio sint culpa fugit
					dolores expedita quisquam excepturi reprehenderit assumenda. Temporibus adipisci, odit facere laborum
					deserunt
					necessitatibus, incidunt dignissimos aperiam obcaecati consequatur aliquam praesentium modi quae voluptate
					et
					voluptates libero eveniet facilis alias veritatis consectetur ducimus accusamus itaque. Quod minus eaque
					sint.
					Quo quia dolorem, corrupti vero dolor suscipit. Assumenda sunt vitae, expedita debitis nemo quam totam
					praesentium ab exercitationem voluptate, nulla ex quia saepe. Quis magni, cum suscipit alias sint velit ea
					inventore. Nam?</p>
			</div>
		</div>
	</section>
</main>

<footer>
	<h1>Footer</h1>
</footer>
!

CSS 

              
                * {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: "Arial", sans-serif;
	background-color: #f5f5f5;
	overflow-x: hidden;
}

h2 {
	font-size: 50px;
	font-weight: normal;
	margin-bottom: 20px;
}

p {
	margin-bottom: 2.5rem;
}

section {
	overflow: hidden;
	border-bottom: 1px dashed red;
}

section .wrap {
	padding: 50px 20px;
}

section.hero {
	min-height: 70vh;
	background: #eee;
}

section.hero .menu {
	list-style: none;
	margin-top: 20px;
	display: flex;
	gap: 15px;
}

.sections {
	position: relative;
	overflow: hidden;
}

.sections__title {
	font-weight: normal;
	font-size: 16px;
	background: rgba(238, 238, 238, 0.05);
	color: #fff;
	padding: 8px 20px;
	border-radius: 5px;
	mix-blend-mode: exclusion;
	position: absolute;
	top: 50px;
	left: 20px;
	z-index: 15;
}

.pin-spacer:has(.sections__title) {
	mix-blend-mode: exclusion;
}

.sections section {
	position: sticky;
	top: 0;
	z-index: 1;
	overflow: hidden;
}

.sections section .container {
	padding-top: 50px;
}

section.section-1 {
	min-height: 100dvh;
	background: #212121;
	color: #fff;
}

section.section-2 {
	background: #eee;
}

section.section-3 {
	background: #eee;
	min-height: 100dvh;
	height: auto;
}

section.section-3 .wrap {
	position: relative;
	overflow: hidden;
	padding-bottom: 0;
	min-height: 100%;
	height: auto;
}

section.section-3 .wrap > div {
	padding-bottom: 50px;
	border-bottom: 1px dashed red;
}

section.section-3 .items {
	display: flex;
	flex-wrap: nowrap;
	width: fit-content;
	min-width: 100%;
}

section.section-3 .items .item {
	border-left: 1px solid #000;
	width: 35vw;
	padding-left: 20px;
	padding-right: 40px;
}

section.section-3 .items .item__title {
	font-size: 20px;
	margin-bottom: 10px;
}

section.section-4 {
	min-height: 100dvh;
	background: #21212152;
	color: #fff;
}

section.section-5 {
	min-height: 100dvh;
	background: #eee;
}

section.section-5 .wrap {
	position: relative;
	height: auto;
	will-change: transform;
}

section.section-5 .box {
	background: #bbb;
	width: 50vw;
	padding: 20px;
}

section.section-6 {
	background: #212121;
	color: #fff;
}

footer {
	height: 100dvh;
	padding: 50px 20px;
	background: #1e1e1e;
	color: #fff;
	position: relative;
	z-index: 20;
}
!

JS 

              
                $(document).ready(function () {
	gsap.registerPlugin(ScrollTrigger);

	// Existing title animation
	gsap.to(".sections__title", {
		scrollTrigger: {
			trigger: ".sections",
			start: "top top",
			end: "bottom top",
			pin: ".sections__title",
			pinSpacing: true,
			scrub: true
			// markers: true,
		}
	});

	// Animation for all sections
	$(".sections section").each(function (index) {
		const section = $(this);
		const sectionHeight = section.outerHeight();
		const viewportHeight = window.innerHeight;
		const isTallerThanViewport = sectionHeight > viewportHeight;
		const isSection3 = section.hasClass("section-3");

		if (isSection3) {
			const items = section.find('.items');
			const wrap = section.find('.wrap');
			const viewportHeight = window.innerHeight;
			const windowWidth = document.body.clientWidth;

			// Calculate scroll distances
			const itemsWidth = items[0].scrollWidth;
			const horizontalScroll = itemsWidth - windowWidth;

			// Horizontal scroll animation
			gsap.to(items, {
				scrollTrigger: {
					trigger: section,
					start: "top top",
					end: () => `+=${horizontalScroll}`,
					pin: true,
					pinSpacing: false,
					scrub: 1,
					onUpdate: (self) => {
						gsap.to(items, {
							x: -horizontalScroll * self.progress,
							duration: 0,
							ease: "none"
						});
					},
					fastScrollEnd: true,
					preventOverlaps: true,
					markers: {
						startColor: "blue",
						endColor: "blue",
						fontSize: "12px",
						indent: 10
					},
					id: "horizontal"
				}
			});

			// Second animation - vertical scroll after horizontal
			gsap.to(wrap, {
				scrollTrigger: {
					trigger: section,
					start: () => `+=${horizontalScroll + 1}`,
					end: () => isTallerThanViewport ? `+=${sectionHeight}` : `+=${viewportHeight}`,
					pin: true,
					pinSpacing: true,
					scrub: true,
					markers: true,
					onUpdate: (self) => {
						if (isTallerThanViewport) {
							gsap.to(wrap, {
								y: -(sectionHeight) * self.progress,
								duration: 0,
								ease: "none"
							});
						}
					}, 
					markers: {
						startColor: "green",
						endColor: "red"
					},
					id: "sticky"
				}
			});
		} else {
			// Keep existing code for other sections
			gsap.to(this, {
				scrollTrigger: {
					trigger: this,
					start: "top top",
					end: () =>
						isTallerThanViewport ? `+=${sectionHeight}` : `+=${viewportHeight}`,
					pin: true,
					pinSpacing: false,
					scrub: true,
					onUpdate: (self) => {
						if (isTallerThanViewport) {
							gsap.to(section.find(".wrap"), {
								y: -sectionHeight * self.progress,
								duration: 0,
								ease: "none"
							});
						}
					}
				}
			});
		}
	});
});
!
999px

Console