JS实现小米轮播图

Neysa ·

更新时间:2024-11-14

· 881 次阅读

原生JS仿小米轮播图(最新版易懂)，供大家参考，具体内容如下

本次内容主要可实现的效果:

自动轮播可点击上一张下一张进行图片的切换点击右下方小圆点进行图片切换

代码部分:

H5:


<div class="wrap">
    <ul class="list">
      <li class="item active"><img src="img/001.jpg" alt=""></li>
      <li class="item"><img src="img/002.jpg"" alt=""></li>
      <li class="item"><img src="img/001.jpg" alt=""></li>
      <li class="item"><img src="img/002.jpg" alt=""></li>
      <li class="item"><img src="img/001.jpg" alt=""></li>
    </ul>
    <!-- 小圆点 -->
    <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="goPre"><</button>
    <button type="button" class="btn" id="goNext">></button>
</div>

CSS部分:


<style>
    .wrap {
      width: 800px;
      height: 400px;
      position: relative;
    }
    .list {
      width: 800px;
      height: 400px;
      list-style: none;
      position: relative;
      padding-left: 0px;
    }
    .item {
      position: absolute;
      width: 100%;
      height: 100%;
      color: white;
      font-size: 50px;
      opacity: 0.6;
      transform: all .8s;
    }
    .item img{
      width: 800px;
      height: 400px;
    }
    .btn {
      width: 50px;
      height: 100px;
      position: absolute;
      top: 150px;
      z-index: 100;
    }
    #goPre {
      left: 0px;
    }
    #goNext {
      right: 0px;
    }
    .item.active {
      opacity: 1;
      z-index: 10;
    }
    .pointList{
      padding-left: 0;
      list-style: none;
      position: absolute;
      right: 20px;
      bottom: 20px;
      z-index: 1000;
    }
    .point{
      width: 10px;
      height: 10px;
      background-color: rgba(0,0,0,0.4);
      border-radius: 50%;
      float: left;
      margin-right: 16px;
      border-style: solid;
      border-width: 2px;
      border-color: rgba(255,255,255, 0.6);
      cursor: pointer;
    }
    .point.active{
      background-color: rgba(255,255,255,0.4);
    }
</style>

JS部分


<script>
    //获取节点
    var items = document.getElementsByClassName('item')//图片
    var goPreBtn = document.getElementById('goPre');
    var goNextBtn = document.getElementById('goNext');
    //获取点
    var points=document.getElementsByClassName('point');
   var time=0;//定时器图片跳转参数
    var index = 0; //表示第几张图片在展示
    //可以展示第几个点
    var clearActive=function(){
      for(var i=0;i<items.length;i++){
        items[i].className='item';
        points[i].className='point';
      }
    }
    var goIndex=function(){
      clearActive();
      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();
    }
    //点击下一张切换图片
    goNextBtn.addEventListener('click' ,function(){
      goNext();
      time=0;
    })
  //点击上一张进行切换图片
    goPreBtn.addEventListener('click' ,function(){
      goPre();
      time=0;
    })
   for(var i=0;i<points.length;i++){
    points[i].addEventListener('click',function(){
      var pointIndex=this.getAttribute('data-index');
      index=pointIndex;
      goIndex();
      time=0;
    })
   }
  //自动轮播定时器
  setInterval(function(){
    time++;
    if(time==20){
      goNext();
      time=0;
    } 
  },100)
</script>

小米 js实现轮播图轮播 js

1024 个赞