DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documenttitle>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
ul,
ol {
list-style: none;
}
a {
text-decoration: none;
color: white;
}
.box {
position: relative;
top: 100px;
width: 600px;
height: 400px;
margin: 0 auto;
background-color: pink;
overflow: hidden;
}
.box img {
height: 400px;
width: 600px;
}
.box ul {
display: flex;
position: absolute;
top: 0px;
left: 0px;
}
.arrow-l,
.arrow-r {
display: none;
position: absolute;
top: 50%;
margin-top: -20px;
width: 24px;
height: 40px;
background: rgba(0, 0, 0, .3);
text-align: center;
line-height: 40px;
color: #fff;
font-family: 'icomoon';
font-size: 18px;
z-index: 2;
}
.arrow-r {
right: 0;
}
.circle {
display: flex;
position: absolute;
bottom: 10px;
left: 50px;
}
.current {
background-color: #fff;
}
.circle li {
width: 20px;
height: 20px;
border: 2px solid rgba(255, 255, 255, 0.5);
margin: 0 3px;
border-radius: 50%;
cursor: pointer;
}
.current {
background-color: #fff;
}
style>
<script>
window.addEventListener('load', function () {
function animate(obj, target, callback) {
clearInterval(obj.timer);
obj.timer = setInterval(function () {
var step = (target - obj.offsetLeft) / 10;
step = step > 0 ? Math.ceil(step) : Math.floor(step);
if (obj.offsetLeft == target) {
clearInterval(obj.timer);
callback && callback();
}
obj.style.left = obj.offsetLeft + step + 'px';
}, 15);
}
var arrow_l = document.querySelector('.arrow-l');
var arrow_r = document.querySelector('.arrow-r');
var box = document.querySelector('.box');
box.addEventListener('mouseenter', function () {
arrow_l.style.display = 'block';
arrow_r.style.display = 'block';
clearInterval(timer);
timer = null;
})
box.addEventListener('mouseleave', function () {
arrow_l.style.display = 'none';
arrow_r.style.display = 'none';
timer = setInterval(function () {
arrow_r.click();
}, 2000);
})
var ul = document.querySelector('.ul');
var ol = document.querySelector('.circle')
for (var i = 0; i < ul.children.length; i++) {
var li = document.createElement('li');
ol.appendChild(li);
li.setAttribute('data-index', i);
li.addEventListener('click', function () {
for (var i = 0; i < ol.children.length; i++) {
ol.children[i].className = '';
}
this.className = 'current';
var width = box.offsetWidth;
var index = this.getAttribute('data-index');
num = index;
circle = index;
var step = index * width;
animate(ul, - step);
})
}
ol.children[0].className = 'current';
var first = ul.children[0].cloneNode(true);
ul.appendChild(first);
var flag = true;
var num = 0;
var circle = 0;
arrow_r.addEventListener('click', function () {
if (flag) {
flag = false;
if (num == ul.children.length - 1) {
ul.style.left = 0;
num = 0;
}
num++;
animate(ul, -num * (box.offsetWidth), function () {
flag = true;
});
circle++;
if (circle == ul.children.length - 1) {
circle = 0;
}
for (var i = 0; i < ol.children.length; i++) {
ol.children[i].className = '';
}
ol.children[circle].className = 'current';
}
})
arrow_l.addEventListener('click', function () {
if (flag) {
if (num == 0) {
num = ol.children.length;
}
num--;
animate(ul, -num * (box.offsetWidth), function () {
flag = true;
});
circle--;
if (circle < 0) {
circle = ol.children.length - 1;
}
for (var i = 0; i < ol.children.length; i++) {
ol.children[i].className = '';
}
ol.children[circle].className = 'current';
}
})
var timer = setInterval(function () {
arrow_r.click();
}, 2000);
})
script>
head>
<body>
<div class="box">
<a href="javascript:;" class="arrow-l">
《
a>
<a href="javascript:;" class="arrow-r">
》a>
<ul class="ul">
<li>
<a href="#"><img src="upload/focus.jpg" alt="">a>
li>
<li>
<a href="#"><img src="upload/focus1.jpg" alt="">a>
li>
<li>
<a href="#"><img src="upload/focus2.jpg" alt="">a>
li>
<li>
<a href="#"><img src="upload/focus3.jpg" alt="">a>
li>
ul>
<ol class="circle">
ol>
div>
body>
html>
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