小编给大家分享一下JS+HTML+CSS怎么实现轮播效果，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！
具体内容如下
1.lunbo.html代码：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>大轮播</title> <link rel="stylesheet" type="text/css" href="CSS/lunbo.css"/> <script src="JS/lunbo.js" type="text/javascript"></script> </head> <body> <div id="container"> <div id="list" > <img src="image/banner_3.jpg"/> <img src="image/banner_1.jpg"/> <img src="image/banner_2.jpg"/> <img src="image/banner_3.jpg"> <img src="image/banner_1.jpg"/></div> <div id="buttons"> <span index="1"></span> <span index="2"></span> <span index="3"></span> </div> <a href="javascript:;" id="prev" class="arrow" ><</a> <a href="javascript:;" id="next" class="arrow" >></a></div> </body> </html>
2.CSS/lunbo.css代码：
body {
margin: 0px;
padding: 0px;
width: 1350px;
height: 618px;
}
a {
text-decoration: none;
}
#container {
width: 1350px;
height: 618px;
overflow: hidden;
position: relative;
border-top: 1px solid #ac6a0a;
}
#list {
width: 6750px;
height: 618px;
position: absolute;
z-index: 1;
}
#list img {
float: left;
width: 1350px;
height: 618px;
}
#buttons {
position: absolute;
height: 20px;
width: 60px;
z-index: 2;
bottom: 20px;
left: 50%;
}
#buttons span {
cursor: pointer;
float: left;
border: 1px solid #ad6a0a;
width: 10px;
height: 10px;
-webkit-border-radius: 50%;
-moz-border-radius: 50%;
border-radius: 50%;
margin-right: 5px;
}
#buttons .on {
background: orangered;
}
.arrow {
cursor: pointer;
display: none;
line-height: 100px;
text-align: center;
width: 40px;
height: 40px;
position: absolute;
z-index: 2;
top: 180px;
background-color: RGBA(0, 0, 0, 0);
color: #fff;
}
.arrow:hover {
background-color: RGBA(0, 0, 0, 0);
}
#container:hover .arrow {
display: block;
}
#prev {
left: 10px;
color: #ffffff;
}
#next {
right: 10px;
color: #ffffff;
}3.JS/lunbo.js代码：
window.onload = function () {
var container = document.getElementById('container');
var list = document.getElementById('list');
var buttons = document.getElementById('buttons').getElementsByTagName('span');
var prev = document.getElementById('prev');
var next = document.getElementById('next');
var index = 1;
var len = 3;
var animated = false;
var interval = 3000;
var timer;
var size = 1350;
function animate(offset) {
if (offset == 0) {
return;
}
animated = true;
var time = 300;
var inteval = 10;
var speed = offset / (time / inteval);
console.log("speed:" + speed);
var left = parseInt(list.style.left) + offset;
var go = function () {
if ((speed > 0 && parseInt(list.style.left) < left) || (speed < 0 && parseInt(list.style.left) > left)) {
list.style.left = parseInt(list.style.left) + speed + 'px';
console.log(list.style.left);
setTimeout(go, inteval);
} else {
list.style.left = left + 'px';
if (left > -200) {
list.style.left = -size * len + 'px';
}
if (left < ( -size * len)) {
list.style.left = '-' + size + 'px';
}
animated = false;
console.log("left:" + list.style.left);
}
}
go();
}
function showButton() {
for (var i = 0; i < buttons.length; i++) {
if (buttons[i].className == 'on') {
buttons[i].className = '';
break;
}
}
buttons[index - 1].className = 'on';
}
function play() {
timer = setTimeout(function () {
next.onclick();
play();
},
interval);
}
function stop() {
clearTimeout(timer);
}
next.onclick = function () {
if (animated) {
return;
}
if (index == len) {
index = 1;
} else {
index += 1;
}
animate(-size);
showButton();
}
prev.onclick = function () {
if (animated) {
return;
}
if (index == 1) {
index = len;
} else {
index -= 1;
}
animate(size);
showButton();
}
for (var i = 0; i < buttons.length; i++) {
buttons[i].onclick = function () {
if (animated) {
return;
}
if (this.className == 'on') {
return;
}
var myIndex = parseInt(this.getAttribute('index'));
var offset = -size * (myIndex - index);
animate(offset);
index = myIndex;
showButton();
}
}
container.onmouseover = stop;
container.onmouseout = play;
play();
};看完了这篇文章，相信你对“JS+HTML+CSS怎么实现轮播效果”有了一定的了解，如果想了解更多相关知识，欢迎关注亿速云行业资讯频道，感谢各位的阅读！
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