3D Carousel Slider in JavaScript

Project:	3D Rotating Carousel with CSS and JavaScript
Author:	SitePoint
Edit Online:	View on CodePen
License:	MIT

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A 3D carousel is one of the attractive elements on a webpage. It allows users to slide the images with a three-dimensional transition effect.

How to Create a 3D Carousel Slider in JavaScript

First of all, load the following assets into the head tag of your HTML document.

 <link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Roboto'>

Create the HTML structure as follows:

<h1>3D Rotating Carousel Examples</h1>

<h2>Three images</h2>
<div class="carousel">
	<figure>
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

<h2>Four images</h2>
<div class="carousel">
	<figure>
    <img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
		<img src="https://source.unsplash.com/mCg0ZgD7BgU/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

<h2>Eight images</h2>
<div class="carousel">
	<figure>
    <img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/mCg0ZgD7BgU/800x533" alt="">
		<img src="https://source.unsplash.com/VkwRmha1_tI/800x533" alt="">
		<img src="https://source.unsplash.com/1FWICvPQdkY/800x533" alt="">
		<img src="https://source.unsplash.com/bjhrzvzZeq4/800x533" alt="">
		<img src="https://source.unsplash.com/7mUXaBBrhoA/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

<h2>Eight images, with 20px gap</h2>
<div class="carousel" data-gap="20">
	<figure>
    <img src="https://source.unsplash.com/mCg0ZgD7BgU/800x533" alt="">
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
		<img src="https://source.unsplash.com/VkwRmha1_tI/800x533" alt="">
		<img src="https://source.unsplash.com/1FWICvPQdkY/800x533" alt="">
		<img src="https://source.unsplash.com/bjhrzvzZeq4/800x533" alt="">
		<img src="https://source.unsplash.com/7mUXaBBrhoA/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

<h2>Eight images, with 80px gap</h2>
<div class="carousel" data-gap="80">
	<figure>
    <img src="https://source.unsplash.com/VkwRmha1_tI/800x533" alt="">
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
		<img src="https://source.unsplash.com/mCg0ZgD7BgU/800x533" alt="">
		<img src="https://source.unsplash.com/1FWICvPQdkY/800x533" alt="">
		<img src="https://source.unsplash.com/bjhrzvzZeq4/800x533" alt="">
		<img src="https://source.unsplash.com/7mUXaBBrhoA/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

<h2>Hidden backfaces</h2>
<div class="carousel" data-gap="20" data-bfc>
	<figure>
    <img src="https://source.unsplash.com/bjhrzvzZeq4/800x533" alt="">
		<img src="https://source.unsplash.com/EbuaKnSm8Zw/800x533" alt="">
		<img src="https://source.unsplash.com/kG38b7CFzTY/800x533" alt="">
		<img src="https://source.unsplash.com/nvzvOPQW0gc/800x533" alt="">
		<img src="https://source.unsplash.com/mCg0ZgD7BgU/800x533" alt="">
		<img src="https://source.unsplash.com/VkwRmha1_tI/800x533" alt="">
		<img src="https://source.unsplash.com/1FWICvPQdkY/800x533" alt="">
		<img src="https://source.unsplash.com/7mUXaBBrhoA/800x533" alt="">
	</figure>
	<nav>
		<button class="nav prev">Prev</button>
		<button class="nav next">Next</button>
	</nav>
</div>

Style using the following CSS styles:

body {
  margin: 0;
  font-family: "Roboto", sans-serif;
  font-size: 16px;
}
.cd__main{
   display: block !important;
  background: #4AC29A;  /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #BDFFF3, #4AC29A);  /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #BDFFF3, #4AC29A) !important; /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

h1 {
  text-align: center;
  margin-bottom: 1.5em;
}

h2 {
  text-align: center;
  color: #555;
  margin-bottom: 0;
}

.carousel {
  padding: 20px;
  perspective: 500px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.carousel > * {
  flex: 0 0 auto;
}
.carousel figure {
  margin: 0;
  width: 40%;
  transform-style: preserve-3d;
  transition: transform 0.5s;
}
.carousel figure img {
  width: 100%;
  box-sizing: border-box;
  padding: 0 0px;
}
.carousel figure img:not(:first-of-type) {
  position: absolute;
  left: 0;
  top: 0;
}
.carousel nav {
  display: flex;
  justify-content: center;
  margin: 20px 0 0;
}
.carousel nav button {
  flex: 0 0 auto;
  margin: 0 5px;
  cursor: pointer;
  color: #333;
  background: none;
  border: 1px solid;
  letter-spacing: 1px;
  padding: 5px 10px;
}

Add the following JavaScript function:

window.addEventListener('load', () => {
  var
  carousels = document.querySelectorAll('.carousel');


  for (var i = 0; i < carousels.length; i++) {
    carousel(carousels[i]);
  }
});

function carousel(root) {
  var
  figure = root.querySelector('figure'),
  nav = root.querySelector('nav'),
  images = figure.children,
  n = images.length,
  gap = root.dataset.gap || 0,
  bfc = ('bfc' in root.dataset),

  theta = 2 * Math.PI / n,
  currImage = 0;


  setupCarousel(n, parseFloat(getComputedStyle(images[0]).width));
  window.addEventListener('resize', () => {
    setupCarousel(n, parseFloat(getComputedStyle(images[0]).width));
  });

  setupNavigation();

  function setupCarousel(n, s) {
    var
    apothem = s / (2 * Math.tan(Math.PI / n));


    figure.style.transformOrigin = `50% 50% ${-apothem}px`;

    for (var i = 0; i < n; i++)
    images[i].style.padding = `${gap}px`;
    for (i = 1; i < n; i++) {
      images[i].style.transformOrigin = `50% 50% ${-apothem}px`;
      images[i].style.transform = `rotateY(${i * theta}rad)`;
    }
    if (bfc)
    for (i = 0; i < n; i++)
    images[i].style.backfaceVisibility = 'hidden';

    rotateCarousel(currImage);
  }

  function setupNavigation() {
    nav.addEventListener('click', onClick, true);

    function onClick(e) {
      e.stopPropagation();

      var t = e.target;
      if (t.tagName.toUpperCase() != 'BUTTON')
      return;

      if (t.classList.contains('next')) {
        currImage++;
      } else
      {
        currImage--;
      }

      rotateCarousel(currImage);
    }

  }

  function rotateCarousel(imageIndex) {
    figure.style.transform = `rotateY(${imageIndex * -theta}rad)`;
  }

}

That’s all! hopefully, you have successfully created 3d Carousel Slider In Javascript. If you have any questions or suggestions, feel free to comment below.