js和CSS3 3D轮播图

这是一款js和CSS3 3D轮播图。这组3D轮播图中，共演示了6种轮播图效果。这些3D轮播图都是通过简单的JS代码配合CSS3来完成的。

使用方法

HTML结构

以8张图片的3D轮播图为例，它的基本HTML结构如下：

<div class="carousel">
  <figure>
        <img src="img/1.jpg" alt="">
    <img src="img/2.jpg" alt="">
    <img src="img/3.jpg" alt="">
    <img src="img/4.jpg" alt="">
    <img src="img/5.jpg" alt="">
    <img src="img/6.jpg" alt="">
    <img src="img/7.jpg" alt="">
    <img src="img/8.jpg" alt="">
  </figure>
  <nav>
    <button class="nav prev">Prev</button>
    <button class="nav next">Next</button>
  </nav>
</div>
                

CSS样式

该3D轮播图的CSS样式如下：

.carousel {
  padding: 20px;
  -webkit-perspective: 500px;
          perspective: 500px;
  overflow: hidden;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.carousel > * {
  -webkit-box-flex: 0;
      -ms-flex: 0 0 auto;
          flex: 0 0 auto;
}
.carousel figure {
  margin: 0;
  width: 40%;
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
  -webkit-transition: -webkit-transform 0.5s;
  transition: -webkit-transform 0.5s;
  transition: transform 0.5s;
  transition: transform 0.5s, -webkit-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: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  margin: 20px 0 0;
}
.carousel nav button {
  -webkit-box-flex: 0;
      -ms-flex: 0 0 auto;
          flex: 0 0 auto;
  margin: 0 5px;
  cursor: pointer;
  color: #333;
  background: none;
  border: 1px solid;
  letter-spacing: 1px;
  padding: 5px 10px;
}                
                

JavaScript

最后通过js代码来控制该3D轮播图的图片切换。

'use strict';

window.addEventListener('load', function () {
  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', function () {
    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)';
  }
}