效果:


轮播图在向一个方向移动的同时,要对其每一个图片的大小,位置,透明度以及层级进行改变

原理:


轮播图向左移动时将第一个子元素剪切到末尾,轮播图向右移动时,将末尾子元素剪切到最前面,以此实现无缝轮播效果,再因为li剪切后,下一个li会补上(例如第一个子元素被剪切到最后时,第二个字元素会补上成为第一个子元素),所以li下标不变,以次来修改每一个位置的li的属性(大小,位置,透明度,层级)
HTML代码:

 <body>    <div class="smallBox">    <div class="arrowLeft">←</div>    <div class="smallPicBox">            //用一个div存放一个ul,并对ul里的每一个li进行初始样式设置    <ul>                <li id="li1" style="position: absolute;top:calc(50% - 200px);left: 0px;z-index:1;background-color: aqua;transform: scale(0.5);transition: 0.3s;opacity: 0.5;background-image: url(./images/01.jpg);background-size: cover;"></li>                <li id="li2" style="position: absolute;top:calc(50% - 200px);left: 150px; z-index:2;background-color: red;transform: scale(0.7); transition: 0.3s;opacity: 0.7;background-image: url(./images/02.jpg);background-size: cover;"></li>                <li id="li3" style="position: absolute;top:calc(50% - 200px);left: 300px; z-index:3;background-color: blue;transform: scale(0.9); transition: 0.3s;opacity: 0.9;background-image: url(./images/03.jpg);background-size: cover;"></li>                <li id="li4" style="position: absolute;top:calc(50% - 200px);left: 450px; z-index:4;background-color: green;transform: scale(1); transition: 0.3s;opacity: 1;background-image: url(./images/04.jpg);background-size: cover;"></li>                <li id="li5" style="position: absolute;top:calc(50% - 200px);left: 600px; z-index:3;background-color: yellow;transform: scale(0.9); transition: 0.3s;opacity: 0.9;background-image: url(./images/05.jpg);background-size: cover;"></li>                <li id="li6" style="position: absolute;top:calc(50% - 200px);left: 750px; z-index:2;background-color: gray;transform: scale(0.7); transition: 0.3s;opacity: 0.7;background-image: url(./images/06.jpg);background-size: cover;"></li>                <li id="li7" style="position: absolute;top:calc(50% - 200px);left: 900px; z-index:1;background-color: deeppink;transform: scale(0.5); transition: 0.3s;opacity: 0.5;background-image: url(./images/07.jpg);background-size: cover;"></li>            </ul>        </div>        <div class="arrowRight">→</div>    </div></div></body>

CSS代码:

<style>        *{            margin: 0;            padding: 0;            list-style: none;        }        .albumBox{            width: 1200px;            height: 400px;            margin: 0 auto;            border: 1px solid #000;        }        .smallBox{            height: 400px;            line-height: 400px;            position: relative;        }        .smallPicBox{            width: 1100px;            height: 400px;            float: left;            position: relative;        }        .smallPicBox ul{            width: 100%;            height: 400px;        }        .smallPicBox li{            width: 320px;            height: 400px;            float: left;            border: 1px solid #000;            box-sizing: border-box;        }        .smallBox .current::after{            content: "25b2";            position: absolute;            top: -31px;            left: 70px;            color: red;        }        .arrowLeft{            width: 50px;            height: 400px;            position: absolute;            left: 0;            border: 1px solid #000;            box-sizing: border-box;            background-color: gray;            z-index: 10;        }        .arrowRight{            width: 50px;            height: 400px;            position: absolute;            right: 0;            border: 1px solid #000;            box-sizing: border-box;            background-color: gray;            z-index: 10;        }    </style>

JS代码:

<script>        var arrowLeft=document.querySelector(".arrowLeft")        var arrowRight=document.querySelector(".arrowRight")        var ul=document.querySelector(".smallPicBox ul")        var li=document.querySelectorAll(".smallPicBox li")        var timerId=0        arrowLeft.onclick=function(){                      //左箭头点击事件                li=document.getElementsByTagName(li)                ul.appendChild(li[0])                         //将ul的第0个子元素剪切到末尾,实现无缝轮播                 posi(li)                                 //修改每一个li的属性           }        arrowRight.onclick=function(){                    //右箭头点击事件            li=document.getElementsByTagName(li)        //重新获取li                ul.insertBefore(li[6],li[0])                 //将ul的最后一个子元素剪切到最前面,实现无缝轮播                 posi(li)                                 //修改每一个li的属性        }                function posi(li){                                //修改li属性函数            var n1=0                for(var x=0;x<li.length;x++){     //修改位置                    li[x].style.left=n1+px                    n1=n1+150                }                for(var i=0;i<li.length/2;i++){     //修改层级                    li[i].style.zIndex=i+1                    li[li.length-1-i].style.zIndex=i+1                }                li[3].style.zIndex=4                var n2=0.3                for(var j=0;j<li.length/2;j++){        //缩放                    n2=parseFloat(n2+0.2)                    li[j].style.transform=scale(+n2+)                    li[li.length-1-j].style.transform=scale(+n2+)                }                li[3].style.transform=scale(1)                var n3=0.3                for(var k=0;k<li.length/2;k++){       //修改透明度                    n3=parseFloat(n3+0.2)                    li[k].style.opacity=n3                    li[li.length-1-k].style.opacity=n3                }                li[3].style.opacity=1        }        //鼠标移入移出        temerId=setInterval(function(){             arrowLeft.click()        }, 1000);        arrowLeft.onmouseover=function(){            clearInterval(temerId)        }        arrowLeft.onmouseout=function(){           temerId=setInterval(function(){            arrowLeft.click()         }, 1000);        }        arrowRight.onmouseover=function(){            clearInterval(temerId)        }        arrowRight.onmouseout=function(){           temerId=setInterval(function(){            arrowLeft.click()         }, 1000);        }    </script>

注:本例js是直接写在body里的,也可以单独写一个js文件,在引入到html界面

效果图:
 

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HTML+CSS+JS实现堆叠轮播效果的示例代码