<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="css.css">
</head>
<body>
<div class="wrap">
<ul class="list">
<li class="item active "></li>
<li class="item"></li>
<li class="item"></li>
<li class="item"></li>
<li class="item"></li>
</ul>
<ul class="pointlist">
<li class="point active"></li>
<li class="point"></li>
<li class="point"></li>
<li class="point"></li>
<li class="point"></li>
</ul>
<button type="button" class="btn" id="goPre"><</button>
<button type="button" class="btn" id="goNext">></button>
</div>
<script>
var items = document.getElementsByClassName('item');
var goPrebtn = document.getElementById('goPre');
var goNextbtn = document.getElementById('goNext');
var points = document.getElementsByClassName('point');
var index = 0;
var goIndex = function()
{
for(var i = 0; i < items.length; i++)
{
items[i].className = 'item';
}
for(var i = 0; i < points.length; i++)
{
points[i].className = 'point';
}
items[index].className = 'item active';
points[index].className = 'point active';
}
var goNext = function()
{
if(index < 4)
{
index++;
}
else index = 0;
goIndex();
}
var goPre = function()
{
if(index == 0)
{
index = 4;
}
else index--;
goIndex();
}
goNextbtn.addEventListener('click', function()
{
goNext();
})
goPrebtn.addEventListener('click', function()
{
goPre();
})
for(var i = 0; i<points.length; i++)
{
points[i].addEventListener('click', function()
{
var pointIndex = this.getAttribute('data-index');
index = pointIndex;
goIndex();
time = 0;
})
}
var time = 0;
setInterval(function()
{
time++;
if(time == 20)
{
goNext();
time = 0;
}
}, 100)
</script>
</body>
</html>
css
.wrap
{
width: 800px;
height: 400px;
position: relative;
}
.list
{
width: 800px;
height: 400px;
padding-left: 0px;
}
.item
{
width: 100%;
height: 100%;
color: white;
font-size: 20px;
position: absolute;
opacity: 0;
transition: all .10s;
}
.item:nth-child(1)
{
background-color: teal;
}
.item:nth-child(2)
{
background-color: rebeccapurple;
}
.item:nth-child(3)
{
background-color: hotpink;
}
.item:nth-child(4)
{
background-color: coral;
}
.item:nth-child(5)
{
background-color: green;
}
.item.active
{
z-index: 10;
opacity: 1;
}
.btn
{
width: 50px;
height: 100px;
position: absolute;
top: 150px;
z-index: 100;
}
#goPre
{
left: 0px;
}
#goNext
{
right: 0px;
}
.pointlist
{
padding-left: 0px;
list-style: none;
position: absolute;
right: 20px;
bottom: 10px;
z-index: 100;
}
.point
{
width: 8px;
height: 8px;
background-color: rgba(0, 0, 0, 4);
border-radius: 100%;
float: left;
margin-left: 12px;
border-style: solid;
border-width: 2px;
border-color: rgba(225, 225, 225, 0.6);
}
.point.active
{
background-color: rgba(225,225,225, 0.2);
z-index: 100;
}
