<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>轮播图</title>
<style type="text/css">
.wrap{
width: 800px;
height:400px ;
position: relative;
cursor: pointer; /*鼠标变手指*/
}
.list{
list-style: none;
position: relative;
padding-left: 0px;
}
.item{
position: absolute;
opacity: 0;
transition: all 3s;
}
img{
width: 800px;
height: 400px;
}
.btn{
width: 50px;
height: 100px;
position: absolute;
top: 150px;
font-size: 50px;
color: rgba(0, 0, 0, 0.1);
z-index: 100;
border: none;
outline: none;
background: rgba(0,0,0,0);
}
.btn:hover{
background: rgba(0, 0, 0, 0.12);
}
#goPro{
left: 0px;
}
#goNext{
right: 0px;
}
.item.active{
opacity: 1;
z-index: 10;
}
.pointList{
padding-left: 0px;
list-style: none;
position: absolute;
right: 20px;
bottom: 20px;
z-index: 999;
}
.point{
width: 8px;
height: 8px;
background-color: rgba(0,0,0,0.4);
border-radius: 100%;
float: left;
margin-right: 10px;
border: 2px solid rgba(255,255,255,0.6);
}
.point.active{
background-color: rgba(255,255,255,0.4);
}
</style>
</head>
<body>
<div class="wrap">
<ul class="list">
<li class="item active "><img src="images/xmad_1542718183295_gZCXT.jpg" /></li>
<li class="item"><img src="images/xmad_1542971774587_QVYos.jpg" /></li>
<li class="item "><img src="images/xmad_15369176983433_sWNIg.jpg"/></li>
<li class="item "><img src="images/xmad_15419444592813_JwZlv.jpg"/></li>
<li class="item"><img src="images/xmad_15427940817559_aubLz.jpg"/></li>
</ul>
<ul class="pointList">
<li class="point active" data-index="0"></li>
<li class="point " data-index="1"></li>
<li class="point " data-index="2"></li>
<li class="point" data-index="3"></li>
<li class="point" data-index="4"></li>
</ul>
<button type="button" class="btn" id="goPro"><</button>
<button type="button" class="btn" id="goNext">></button>
</div>
<script type="text/javascript">
var items=document.getElementsByClassName("item");
var points=document.getElementsByClassName("point");
var goProBtn=document.getElementById("goPro");
var goNextBtn=document.getElementById("goNext");
var time=0;
var index=0;
function clearActive() {
for(var i=0;i<items.length;i++)
{
items[i].className="item";
}
for(var i=0;i<points.length;i++)
{
points[i].className="point";
}
}
function goIndex() {
clearActive();
points[index].className="point active";
items[index].className="item active";
}
function goNext() {
if(index<4){
index++;
}
else{
index=0;
}
goIndex();
}
function goPro() {
if(index==0){
index=4;
}
else{
index--;
}
goIndex();
}
goNextBtn.addEventListener("click",function () {goNext();})
goProBtn.addEventListener("click",function () {goPro();})
for (var i=0;i<points.length;i++){
points[i].addEventListener("click",function () {
var pointIndex=this.getAttribute("data-index");
index=pointIndex;
goIndex();
time=0;
})
}
setInterval(function () {
time++;
if(time==20){
goNext();
time=0;
}
},100);
</script>
</body>
</html>