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HTML

              
                <!-- Orig Polyfill -->
<!-- <script src="https://flackr.github.io/scroll-timeline/dist/scroll-timeline.js"></script> -->

<!-- Forked Polyfill which caches the ProxyAnimation Instances -->
<!-- PR: https://github.com/flackr/scroll-timeline/pull/84/ -->
<script src="https://rawcdn.githack.com/bramus/scroll-timeline/b59ed75508d7341f97dc25eccf20ab66231c815a/dist/scroll-timeline.js"></script>

<input type="checkbox" id="debug" />

<ul class="cards">
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Front-1024x1024.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--A-Thousand-Clouds-Front-Cover-1024x1024.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Odd-World-EP-SMALL-1024x1024.png" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Forest-Blue-Pre-LR-1024x1024.png" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--MOM-Remixes-1024x1024.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--ALONE-TOGETHER-remix-V71-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Nature-Therapy-Pre-LR-550x550.png" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Deep-Dive-Ambient-Edits-V8-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Alpine-Koresma-x-Aroth-Artwork-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Out-Of-the-Dark-Cover-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--2020-06-07-Marley-Carroll-Single-Blue-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Deep-Dive-EP-Cover-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Blackrose-Cover-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--FW-Imagine-Gold-Remixes2-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--We-Are-COVER-MAIN-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Bath-House-Flat-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Pronoia-JPG-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Lapa9Theory-Cracking-Stores-no-Loci-logo-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--EMANCIPATOR_MOM_AlbumCover-2000px-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--MURGE-ep-cvr-3000x3000-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--Emancipator_Laybrinth-ART-01-4000x4000-at-300dpi-550x550.jpg" width="1200" height="1200" />
    </li>
    <li>
        <img draggable="false" src="https://assets.codepen.io/89905/coverflow--cover-550x550.jpg" width="1200" height="1200" />
    </li>
</ul>

<div class="warning warning--info">
	<p>ℹ️ Your browser does not support CSS Scroll-Linked Animations with <code>view-timeline</code>. To cater for this, <a href="https://github.com/flackr/scroll-timeline">a polyfill</a> has been loaded. Additionally, you can check out <a href="https://codepen.io/bramus/pen/MWVExQg" target="_top">a WAAPI-based ScrollTimeline version</a> or <a href="https://twitter.com/bramus/status/1577358046631698434" target="_top" rel="noopener noreferrer">a recording of this demo</a>.</p>
</div>
              
            
!

CSS

              
                @layer base, components;

/* Hide warning when native view-timeline support detected */
@supports (view-timeline: works) {
	.warning {
		display: none;
	}
}

/* Animation bumps up the z-index, to make sure it’s on top */
@keyframes adjust-z-index {
	0% {
		z-index: 1;
	}
	50% {
		z-index: 100; /* When at the center, be on top */
	}
	100% {
		z-index: 1;
	}
}

/* Animation that rotates the cover */
@keyframes rotate-cover {
	0% {
		transform: translateX(-100%) rotateY(-45deg);
	}
	35% {
		transform: translateX(0) rotateY(-45deg);
	}
	50% {
		transform: rotateY(0deg) translateZ(1em) scale(1.5);
	}
	65% {
		transform: translateX(0) rotateY(45deg);
	}
	100% {
		transform: translateX(100%) rotateY(45deg);
	}
}

.cards li {	
	/* Track this element as it intersects the scrollport */
	view-timeline-name: li-in-and-out-of-view;
	view-timeline-axis: inline;

	/* Link an animation to the established view-timeline and have it run during the contain phase */
	animation: 1s linear adjust-z-index both;
	animation-timeline: li-in-and-out-of-view;
	animation-time-range: contain 0% 100%;

	/* Make the 3D stuff work… */
	perspective: 40em;
		
	position: relative;
	z-index: 1;
	will-change: z-index;
}

.cards li > img {
	/* Link an animation to the established view-timeline (of the parent li) and have it run during the contain phase */
	animation: 1s linear rotate-cover both;
	animation-timeline: li-in-and-out-of-view;
	animation-time-range: contain 0% 100%;
	
	/* Prevent FOUC */
	transform: translateX(-100%) rotateY(-45deg);

	will-change: transform;
}

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

	:root {
		--cover-size: 15rem;
	}

	@media (max-width: 800px) {
		:root {
			--cover-size: 9rem;
		}
	}
	
	html, body {
		height: 100%;
		width: 100%;
	}

	body {
		background: #111;
		font-family: sans-serif;

		display: flex;
		flex-direction: column;
		gap: 1em;
		padding: 1em;
/* 		place-content: center; */
	}

	.cards {
		list-style: none;
		overflow-x: scroll;
		width: 100%;
		white-space: nowrap;

		scroll-snap-type: x mandatory;
		outline: 1px solid #333;
		background: rgba(0 0 0 / 0.5);
		
	}

	.cards li {
		display: inline-block;
		width: var(--cover-size);
		height: var(--cover-size);
		scroll-snap-align: center;
	}

	.cards li img {
		dislay: block;
		width: var(--cover-size);
		height: var(--cover-size);

		-webkit-box-reflect: below 0.5em
			linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.25));
	}

	.cards {
		min-height: calc(var(--cover-size) * 2.5);

		max-width: calc(var(--cover-size) * 6);
		margin: 0 auto;
  		padding: calc(var(--cover-size) / 3 * 2) 0;
	}
	
	.cards li:first-of-type {
		margin-left: calc(50% - var(--cover-size) / 2);
	}
	.cards li:last-of-type {
		margin-right: calc(50% - var(--cover-size) / 2);
	}
}

@layer components {
	@layer warning {
		/* Show warning for browsers without support */
		.warning {
			padding: 1em;
			border: 1px solid black;
			z-index: 9999;
			color: black;
			background: rgba(255 255 225 / 0.9);
			z-index: 10001;
			
			opacity: 0.75;
		}
		
		:is(
			.warning:hover,
			.warning:has(:focus-within)
		) {
			opacity: 1;
		}

		.warning > :first-child {
			margin-top: 0;
		}

		.warning > :last-child {
			margin-bottom: 0;
		}

		.warning a {
			color: blue;
		}

		.warning--info {
			border: 1px solid #123456;
			background: rgba(205 230 255 / 0.8);
		}
	}
	
	@layer debug {
		#debug {
			position: absolute;
			top: 1em;
			left: 1em;
		}
		#debug::after {
			content: " Show Debug";
			margin-left: 1.5em;
			color: white;
			white-space: nowrap;
		}

		#debug:checked + .cards {
			border: 1px solid lime;
		}

		#debug:checked + .cards li {
			text-align: center;
			color: white;
			border: 1px solid blue;
		}

		#debug:checked + .cards li::before {
			content: attr(id);
			display: block;
			position: absolute;
			inset: 0;
			line-height: var(--cover-size);
			opacity: 0.5;
		}

		#debug:checked + .cards li img {
			opacity: 0.5;
		}
	}
}
              
            
!

JS

              
                // Alternative Versions:
// - JS ScrollTimeline 2022: https://codepen.io/bramus/pen/MWVExQg
// - CSS view-timeline 2022: https://codepen.io/bramus/pen/GRdGoKy/ 👈 = The version you are currently looking at
// - JS Motion One: https://codepen.io/bramus/pen/PoRKEaZ 
// - CSS @scroll-timeline 2021 (Old Syntax): https://codepen.io/bramus/pen/xxRZZdK
// - JS ScrollTimeline 2021 (Old Syntax): https://codepen.io/bramus/pen/PobZbBV

              
            
!
999px

Console