javascript - How to make 3D carousel rotate automatically, no clicks required and stop at mouse hover

Question

I found this 3D carousel online and wondering how to make it rotate infinitely without clicking buttons and stops at mouse hover, then continues to rotate again when there is no hover.

var carousel = $(".carousel"),
    currdeg  = 0;

$(".next").on("click", { d: "n" }, rotate);
$(".prev").on("click", { d: "p" }, rotate);

function rotate(e){
  if(e.data.d=="n"){
    currdeg = currdeg - 60;
  }
  if(e.data.d=="p"){
    currdeg = currdeg + 60;
  }
  carousel.css({
    "-webkit-transform": "rotateY("+currdeg+"deg)",
    "-moz-transform": "rotateY("+currdeg+"deg)",
    "-o-transform": "rotateY("+currdeg+"deg)",
    "transform": "rotateY("+currdeg+"deg)"
  });
}

Here is a codepen

标签： javascripthtmlcssbootstrap-4carousel

Answer 1

@mamoun othman 在这里做得很好！我在hover下面添加了暂停/重启功能：

var carousel = $(".carousel"), currdeg  = 0;

function rotate(e){
  currdeg = currdeg - 60
  carousel.css({
    "-webkit-transform": "rotateY("+currdeg+"deg)",
    "-moz-transform": "rotateY("+currdeg+"deg)",
    "-o-transform": "rotateY("+currdeg+"deg)",
    "transform": "rotateY("+currdeg+"deg)"
  });
}

// storing state in window.carouselPause
const startCarousel = (e) => window.carouselPause = setInterval(rotate, 1000);
const stopCarousel = (e) => clearInterval(window.carouselPause);

carousel.on({
  // pause carousel when mouse is over
  'mouseenter': stopCarousel,
  // resume when mouse is off
  'mouseleave': startCarousel
});

// start the carousel when the page is loaded
startCarousel();

body {
  background: #333;
  padding: 70px 0;
  font: 15px/20px Arial, sans-serif;
}

.container {
  margin: 0 auto;
  width: 250px;
  height: 200px;
  position: relative;
  perspective: 1000px;
}

.carousel {
  height: 100%;
  width: 100%;
  position: absolute;
  transform-style: preserve-3d;
  transition: transform 1s;
}

.item {
  display: block;
  position: absolute;
  background: #000;
  width: 250px;
  height: 200px;
  line-height: 200px;
  font-size: 5em;
  text-align: center;
  color: #FFF;
  opacity: 0.95;
  border-radius: 10px;
}

.a {
  transform: rotateY(0deg) translateZ(250px);
  background: #ed1c24;
}
.b {
  transform: rotateY(60deg) translateZ(250px);
  background: #0072bc;
}
.c {
  transform: rotateY(120deg) translateZ(250px);
  background: #39b54a;
}
.d {
  transform: rotateY(180deg) translateZ(250px);
  background: #f26522;
}
.e {
  transform: rotateY(240deg) translateZ(250px);
  background: #630460;
} 
.f {
  transform: rotateY(300deg) translateZ(250px);
  background: #8c6239;
}

.next, .prev {
  color: #444;
  position: absolute;
  top: 100px;
  padding: 1em 2em;
  cursor: pointer;
  background: #CCC;
  border-radius: 5px;
  border-top: 1px solid #FFF;
  box-shadow: 0 5px 0 #999;
  transition: box-shadow 0.1s, top 0.1s;
}
.next:hover, .prev:hover { color: #000; }
.next:active, .prev:active {
  top: 104px;
  box-shadow: 0 1px 0 #999;
}
.next { right: 5em; }
.prev { left: 5em; }

<div class="container">
  <div class="carousel">
    <div class="item a">A</div>
    <div class="item b">B</div>
    <div class="item c">C</div>
    <div class="item d">D</div>
    <div class="item e">E</div>
    <div class="item f">F</div>
  </div>
</div>
<!--<div class="next">Next</div>
<div class="prev">Prev</div>-->
<script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>