演示：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>无限轮播</title>
<style>
img {
height: 200px;
width: 500px;
float: left;
}
.show {
width: 500px;
height: 200px;
margin: 0 auto;
border: 2px solid rgb(0, 255, 85);
/* overflow: hidden; */
}
.warp {
width: 2000px;
position: relative;
left: -20px;
}
.trans {
transition: all .5s;
}
</style>
</head>
<body>
<div class="show">
<div class="warp trans">
<img src="1.jpg" alt="" srcset="">
<img src="2.jpg" alt="" srcset="">
<img src="3.jpg" alt="" srcset="">
<img src="1.jpg" alt="" srcset="">
</div>
</div>
</body>
<script>
var show = document.getElementsByClassName("show")[0]
var warp = document.getElementsByClassName("warp")[0]
var rightStep = 500
time = 1
totleTime = 3
document.addEventListener("transitionend", function () {
if (time == totleTime+1) {
warp.className = "warp"
time = 1
warp.style.left = '0px'
}
})
document.addEventListener("transitionstart",function(){
time++
})
setInterval(function () {
warp.className = "warp trans"
warp.style.left = -rightStep * time + 'px'
}, 1000)
</script>
</html>
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