3D Carousel Using HTML, CSS, and JavaScript
Tags: javascript, programming, html, css
Published: 2023-02-10 05:32:15

In this post, we will walk you through the steps of building a sleek and interactive 3D carousel from scratch. Whether you’re a beginner or an experienced developer, this tutorial will provide you with the knowledge and tools you need to create your own 3D carousel.

By the end of this post, you’ll have a solid understanding of how to use HTML, CSS, and JavaScript to create a dynamic and engaging 3D carousel. So, let’s get started!

## **HTML**

```
var radius = 240; // how big of the radius
var autoRotate = true; // auto rotate or not
var rotateSpeed = -60; // unit: seconds/360 degrees
var imgWidth = 120; // width of images (unit: px)
var imgHeight = 170; // height of images (unit: px)

// Link of background music - set 'null' if you dont want to play background music
var bgMusicURL = 'https://api.soundcloud.com/tracks/143041228/stream?client_id=587aa2d384f7333a886010d5f52f302a';
var bgMusicControls = true; // Show UI music control



// ===================== start =======================
// animation start after 1000 miliseconds
setTimeout(init, 1000);

var odrag = document.getElementById('drag-container');
var ospin = document.getElementById('spin-container');
var aImg = ospin.getElementsByTagName('img');
var aVid = ospin.getElementsByTagName('video');
var aEle = [...aImg, ...aVid]; // combine 2 arrays

// Size of images
ospin.style.width = imgWidth + "px";
ospin.style.height = imgHeight + "px";

// Size of ground - depend on radius
var ground = document.getElementById('ground');
ground.style.width = radius * 3 + "px";
ground.style.height = radius * 3 + "px";

function init(delayTime) {
  for (var i = 0; i < aEle.length; i++) {
    aEle[i].style.transform = "rotateY(" + (i * (360 / aEle.length)) + "deg) translateZ(" + radius + "px)";
    aEle[i].style.transition = "transform 1s";
    aEle[i].style.transitionDelay = delayTime || (aEle.length - i) / 4 + "s";
  }
}

function applyTranform(obj) {
  // Constrain the angle of camera (between 0 and 180)
  if(tY > 180) tY = 180;
  if(tY < 0) tY = 0;

  // Apply the angle
  obj.style.transform = "rotateX(" + (-tY) + "deg) rotateY(" + (tX) + "deg)";
}

function playSpin(yes) {
  ospin.style.animationPlayState = (yes?'running':'paused');
}

var sX, sY, nX, nY, desX = 0,
    desY = 0,
    tX = 0,
    tY = 10;

// auto spin
if (autoRotate) {
  var animationName = (rotateSpeed > 0 ? 'spin' : 'spinRevert');
  ospin.style.animation = `${animationName} ${Math.abs(rotateSpeed)}s infinite linear`;
}

// add background music
if (bgMusicURL) {
  document.getElementById('music-container').innerHTML += `
<audio src="${bgMusicURL}" ${bgMusicControls? 'controls': ''} autoplay loop>    
<p>If you are reading this, it is because your browser does not support the audio element.</p>
</audio>
`;
}

// setup events
document.onpointerdown = function (e) {
  clearInterval(odrag.timer);
  e = e || window.event;
  var sX = e.clientX,
      sY = e.clientY;

  this.onpointermove = function (e) {
    e = e || window.event;
    var nX = e.clientX,
        nY = e.clientY;
    desX = nX - sX;
    desY = nY - sY;
    tX += desX * 0.1;
    tY += desY * 0.1;
    applyTranform(odrag);
    sX = nX;
    sY = nY;
  };

  this.onpointerup = function (e) {
    odrag.timer = setInterval(function () {
      desX *= 0.95;
      desY *= 0.95;
      tX += desX * 0.1;
      tY += desY * 0.1;
      applyTranform(odrag);
      playSpin(false);
      if (Math.abs(desX) < 0.5 && Math.abs(desY) < 0.5) {
        clearInterval(odrag.timer);
        playSpin(true);
      }
    }, 17);
    this.onpointermove = this.onpointerup = null;
  };

  return false;
};

document.onmousewheel = function(e) {
  e = e || window.event;
  var d = e.wheelDelta / 20 || -e.detail;
  radius += d;
  init(1);
};
```

## **CSS**

```
* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  /* for touch screen */
  touch-action: none; 
}

body {
  overflow: hidden;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  background: #111;
  -webkit-perspective: 1000px;
          perspective: 1000px;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

#drag-container, #spin-container {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  margin: auto;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transform: rotateX(-10deg);
          transform: rotateX(-10deg);
}

#drag-container img, #drag-container video {
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  line-height: 200px;
  font-size: 50px;
  text-align: center;
  -webkit-box-shadow: 0 0 8px #fff;
          box-shadow: 0 0 8px #fff;
  -webkit-box-reflect: below 10px linear-gradient(transparent, transparent, #0005);
}

#drag-container img:hover, #drag-container video:hover {
  -webkit-box-shadow: 0 0 15px #fffd;
          box-shadow: 0 0 15px #fffd;
  -webkit-box-reflect: below 10px linear-gradient(transparent, transparent, #0007);
}

#drag-container p {
  font-family: Serif;
  position: absolute;
  top: 100%;
  left: 50%;
  -webkit-transform: translate(-50%,-50%) rotateX(90deg);
          transform: translate(-50%,-50%) rotateX(90deg);
  color: #fff;
}

#ground {
  width: 900px;
  height: 900px;
  position: absolute;
  top: 100%;
  left: 50%;
  -webkit-transform: translate(-50%,-50%) rotateX(90deg);
          transform: translate(-50%,-50%) rotateX(90deg);
  background: -webkit-radial-gradient(center center, farthest-side , #9993, transparent);
}

#music-container {
  position: absolute;
  top: 0;
  left: 0;
}

@-webkit-keyframes spin {
  from{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
  } to{
    -webkit-transform: rotateY(360deg);
            transform: rotateY(360deg);
  }
}

@keyframes spin {
  from{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
  } to{
    -webkit-transform: rotateY(360deg);
            transform: rotateY(360deg);
  }
}
@-webkit-keyframes spinRevert {
  from{
    -webkit-transform: rotateY(360deg);
            transform: rotateY(360deg);
  } to{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
  }
}
@keyframes spinRevert {
  from{
    -webkit-transform: rotateY(360deg);
            transform: rotateY(360deg);
  } to{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
  }
}
```

## **JS**

```
var radius = 240; // how big of the radius
var autoRotate = true; // auto rotate or not
var rotateSpeed = -60; // unit: seconds/360 degrees
var imgWidth = 120; // width of images (unit: px)
var imgHeight = 170; // height of images (unit: px)

// Link of background music - set 'null' if you dont want to play background music
var bgMusicURL = 'https://api.soundcloud.com/tracks/143041228/stream?client_id=587aa2d384f7333a886010d5f52f302a';
var bgMusicControls = true; // Show UI music control



// ===================== start =======================
// animation start after 1000 miliseconds
setTimeout(init, 1000);

var odrag = document.getElementById('drag-container');
var ospin = document.getElementById('spin-container');
var aImg = ospin.getElementsByTagName('img');
var aVid = ospin.getElementsByTagName('video');
var aEle = [...aImg, ...aVid]; // combine 2 arrays

// Size of images
ospin.style.width = imgWidth + "px";
ospin.style.height = imgHeight + "px";

// Size of ground - depend on radius
var ground = document.getElementById('ground');
ground.style.width = radius * 3 + "px";
ground.style.height = radius * 3 + "px";

function init(delayTime) {
  for (var i = 0; i < aEle.length; i++) {
    aEle[i].style.transform = "rotateY(" + (i * (360 / aEle.length)) + "deg) translateZ(" + radius + "px)";
    aEle[i].style.transition = "transform 1s";
    aEle[i].style.transitionDelay = delayTime || (aEle.length - i) / 4 + "s";
  }
}

function applyTranform(obj) {
  // Constrain the angle of camera (between 0 and 180)
  if(tY > 180) tY = 180;
  if(tY < 0) tY = 0;

  // Apply the angle
  obj.style.transform = "rotateX(" + (-tY) + "deg) rotateY(" + (tX) + "deg)";
}

function playSpin(yes) {
  ospin.style.animationPlayState = (yes?'running':'paused');
}

var sX, sY, nX, nY, desX = 0,
    desY = 0,
    tX = 0,
    tY = 10;

// auto spin
if (autoRotate) {
  var animationName = (rotateSpeed > 0 ? 'spin' : 'spinRevert');
  ospin.style.animation = `${animationName} ${Math.abs(rotateSpeed)}s infinite linear`;
}

// add background music
if (bgMusicURL) {
  document.getElementById('music-container').innerHTML += `
<audio src="${bgMusicURL}" ${bgMusicControls? 'controls': ''} autoplay loop>    
<p>If you are reading this, it is because your browser does not support the audio element.</p>
</audio>
`;
}

// setup events
document.onpointerdown = function (e) {
  clearInterval(odrag.timer);
  e = e || window.event;
  var sX = e.clientX,
      sY = e.clientY;

  this.onpointermove = function (e) {
    e = e || window.event;
    var nX = e.clientX,
        nY = e.clientY;
    desX = nX - sX;
    desY = nY - sY;
    tX += desX * 0.1;
    tY += desY * 0.1;
    applyTranform(odrag);
    sX = nX;
    sY = nY;
  };

  this.onpointerup = function (e) {
    odrag.timer = setInterval(function () {
      desX *= 0.95;
      desY *= 0.95;
      tX += desX * 0.1;
      tY += desY * 0.1;
      applyTranform(odrag);
      playSpin(false);
      if (Math.abs(desX) < 0.5 && Math.abs(desY) < 0.5) {
        clearInterval(odrag.timer);
        playSpin(true);
      }
    }, 17);
    this.onpointermove = this.onpointerup = null;
  };

  return false;
};

document.onmousewheel = function(e) {
  e = e || window.event;
  var d = e.wheelDelta / 20 || -e.detail;
  radius += d;
  init(1);
};
```
Thanks