html+css+js实现原生轮播特效
index.html
<!DOCTYPE html>
<html>
<head>
<title>lunbo</title>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="./css/lunbo.css">
<script type=text/javascript src="./js/b.js"></script>
</head>
<body>
<div id="container">
<div id="list" style="left: -500px;">
<img src="./imgs/e.jpg" alt="5"/>
<img src="./imgs/a.jpg" alt="1"/>
<img src="./imgs/b.jpg" alt="2"/>
<img src="./imgs/c.jpg" alt="3"/>
<img src="./imgs/d.jpg" alt="4"/>
<img src="./imgs/e.jpg" alt="5"/>
<img src="./imgs/a.jpg" alt="1"/>
</div>
<div id="buttons">
<span index="1" class="on"></span>
<span index="2" ></span>
<span index="3" ></span>
<span index="4" ></span>
<span index="5" ></span>
</div>
<a href="javascript:;" id="back" class="arrow"><</a>
<a href="javascript:;" id="next" class="arrow">></a>
</div>
</body>
</html>lunbo.css
html,body{
margin: 0;
padding: 0;
}
#container {
width: 500px;
height: 500px;
border: 3px solid #333;
overflow: hidden;
position: relative;
margin:auto;
}
#list { width: 3500px;
height: 500px;
position: absolute;
z-index: 1;
}
#list img {
float: left;
}
#buttons {
position: absolute;
height: 10px;
width: 100px;
z-index: 2;
bottom: 20px;
left: 250px;
}
#buttons span {
cursor: pointer;
float: left;
border: 1px solid #fff;
width: 10px; height: 10px;
border-radius: 50%;
background: #333;
margin-right: 5px;
}
#buttons .on {
background: orangered;
}
.arrow {
cursor: pointer;
display: none;
line-height: 39px;
text-align: center;
font-size: 36px;
font-weight: bold;
width: 40px;
height: 40px;
position: absolute;
z-index: 2;
top: 180px;
background-color: RGBA(0,0,0,.3);
color: #fff;
}
.arrow:hover {
background-color: RGBA(0,0,0,.7);
}
#container:hover .arrow {
display: block;
}
#prev {
left: 20px;
}
#next {
right: 20px;
}window.onload=function() {
var container = document.getElementById('container');
var list = document.getElementById('list');
var buttons = document.getElementById('buttons').getElementsByTagName('span');
var back = document.getElementById('back');
var next = document.getElementById('next');
var index = 1;
var len = 5;
var animated = false;
var interval =2500;
var timer;
function animate(offset) {
if (offset == 0) {
return;
}
animated = true;
var time =100;
var inteval =10;
var speed = offset/(time/inteval);
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';
setTimeout(go, inteval);
}
else {
list.style.left = left + 'px';
if(left>-100){
list.style.left = -500 * len + 'px';
}
if(left<(-500 * len)) {
list.style.left = '-500px';
}
animated = false;
}
}
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 == 5) {
index = 1;
}
else {
index += 1;
}
animate(-500);
showButton();
}
back.onclick = function () {
if (animated) {
return;
}
if (index == 1) {
index =5;
}
else {
index -= 1;
}
animate(500);
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 = -500 * (myIndex - index);
animate(offset);
index = myIndex;
showButton();
}
}
container.onmouseover =stop;
container.onmouseout =play;
play();
}
效果如图：
