JS implements left and right seamless carousel image code

JS implements left and right seamless carousel image code_javascript skills

WBOY

Release： 2016-05-16 15:02:51

Original

1687 people have browsed it

No more nonsense, let me just post the code for you.

Seamless carousel:

<title>无缝轮播图</title>
<style>
*{margin: 0;padding:0; }
ul{list-style: none;}
.banner{width: 600px;height: 300px;border: 2px solid #ccc;margin: 100px auto;position: relative;overflow: hidden;}
.img{position: absolute;top: 0;left: 0}
.img li{float: left;}
.num{position: absolute;bottom: 10px;width: 100%;text-align: center;font-size: 0;}
.num li{width: 10px;height: 10px;background:rgba(0,0,0,0.5);display: block;border-radius: 100%;display: inline-block;margin: 0 5px;cursor: pointer;}
.btn{display: none;}
.btn span{display: block;width: 50px;height: 100px;background: rgba(0,0,0,0.6);color: #fff;font-size: 40px;line-height: 100px;text-align: center;cursor:pointer;}
.btn .prev{position: absolute;left: 0;top: 50%;margin-top: -50px;}
.btn .next{position: absolute;right: 0;top: 50%;margin-top: -50px;}
.num .active{background-color: #fff;}
</style>
<script src="http://apps.bdimg.com/libs/jquery/1.8.3/jquery.min.js"></script>
</head>
<body>
<div class="banner">
<ul class="img">
<li><a href="#"><img src="img/1.jpg" alt="第1张图片"></a></li>
<li><a href="#"><img src="img/2.jpg" alt="第2张图片"></a></li>
<li><a href="#"><img src="img/3.jpg" alt="第3张图片"></a></li>
<li><a href="#"><img src="img/4.jpg" alt="第4张图片"></a></li>
<li><a href="#"><img src="img/5.jpg" alt="第5张图片"></a></li>
</ul>
<ul class="num"></ul> //
<div class="btn">
<span class="prev"><</span>
<span class="next">></span>
</div>
</div>
<script>
$(function(){
var i=0;
var timer=null;
for (var j = 0; j < $('.img li').length; j++) { //创建圆点
$('.num').append('<li></li>')
}
$('.num li').first().addClass('active'); //给第一个圆点添加样式
var firstimg=$('.img li').first().clone(); //复制第一张图片
$('.img').append(firstimg).width($('.img li').length*($('.img img').width())); //将第一张图片放到最后一张图片后，设置ul的宽度为图片张数*图片宽度
// 下一个按钮
$('.next').click(function(){
i++;
if (i==$('.img li').length) {
i=1; //这里不是i=0
$('.img').css({left:0}); //保证无缝轮播，设置left值
};
$('.img').stop().animate({left:-i*600},300);
if (i==$('.img li').length-1) { //设置小圆点指示
$('.num li').eq(0).addClass('active').siblings().removeClass('active');
}else{
$('.num li').eq(i).addClass('active').siblings().removeClass('active');
}
})
// 上一个按钮
$('.prev').click(function(){
i--;
if (i==-1) {
i=$('.img li').length-2;
$('.img').css({left:-($('.img li').length-1)*600});
}
$('.img').stop().animate({left:-i*600},300);
$('.num li').eq(i).addClass('active').siblings().removeClass('active');
})
//设置按钮的显示和隐藏
$('.banner').hover(function(){
$('.btn').show();
},function(){
$('.btn').hide();
})
//鼠标划入圆点
$('.num li').mouseover(function(){
var _index=$(this).index();
$('.img').stop().animate({left:-_index*600},150);
$('.num li').eq(_index).addClass('active').siblings().removeClass('active');
})
//定时器自动播放
timer=setInterval(function(){
i++;
if (i==$('.img li').length) {
i=1;
$('.img').css({left:0});
};
$('.img').stop().animate({left:-i*600},300);
if (i==$('.img li').length-1) { 
$('.num li').eq(0).addClass('active').siblings().removeClass('active');
}else{
$('.num li').eq(i).addClass('active').siblings().removeClass('active');
}
},1000)
//鼠标移入，暂停自动播放，移出，开始自动播放
$('.banner').hover(function(){ 
clearInterval(timer);
},function(){
timer=setInterval(function(){
i++;
if (i==$('.img li').length) {
i=1;
$('.img').css({left:0});
};
$('.img').stop().animate({left:-i*600},300);
if (i==$('.img li').length-1) { 
$('.num li').eq(0).addClass('active').siblings().removeClass('active');
}else{
$('.num li').eq(i).addClass('active').siblings().removeClass('active');
}
},1000)
})
})
</script>

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The above code is a seamless carousel effect achieved using js. The code is relatively simple, so there is no comment for you. If you have any questions, please leave me a message.