老师,请您帮忙来检查一下代码,谢谢!

来源:6-3 编写跑马灯轮播图特效

慕粉1924517932

2021-12-12 15:23:11

问题描述:

老师为什么我做的效果跟视频当中的不是很一样,请您出手检查一下,谢谢

相关代码:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
     *{
       padding:0px;
       margin:0px;
     }
     .box{
       width:650px;
       height:360px;
       margin:50px auto;
       border: 1px solid #000;
       position: relative;
       overflow: hidden;
     }
     .box ul{
       width:5000px;
       list-style: none;
       left:0px;
       position: relative;
       
       transition: left .5s ease 0s; 
     }
     .box ul li{
       float:left;
     }
     .leftbtn{
       width:30px;
       height:30px;
       background-color: red;
       border: 1px solid #000;
       text-decoration: none;
       border-radius: 50%;
       position: absolute;
       left:20px;
       top:50%;
       margin-top:-25px;
       font-size: 25px;
       color:white;
       text-align: center;
       line-height: 30px;
     }
     .rightbtn{
       width:30px;
       height:30px;
       background-color: red;
       border: 1px solid #000;
       text-decoration: none;
       border-radius: 50%;
       position: absolute;
       right:20px;
       top:50%;
       margin-top:-25px;
       font-size: 25px;
       color:white;
       text-align: center;
       line-height: 30px;
     }
  </style>
</head>
<body>
   <div class="box"id="box">
      <ul class="list"id="list">
        <li><img src="image/hudie.jpg"width="650px"height="360px"></li>
        <li><img src="image/huoshaoyun.jpg"width="650px"height="360px"></li>
        <li><img src="image/jiudian.jpg"width="650px"height="360px"></li>
        <li><img src="image/shanshui.jpg"width="650px"height="360px"></li>
        <li><img src="image/wangzixuan1.jpg"width="650px"height="360px"></li>
      </ul>
      <a href="javascript:;"class="leftbtn"id="leftbtn">&lt</a>
      <a href="javascript:;"class="rightbtn"id="rightbtn">&gt</a>
   </div>
</body>
<script>
    var leftbtn=document.getElementById('leftbtn');
    var rightbtn=document.getElementById('rightbtn');
    var list=document.getElementById('list');
    var cloneli=list.firstElementChild.cloneNode(true);
    list.appendChild(cloneli);
    //当前ul显示到第几章了了,从0开始数 
    var idx=0;
    //节流锁
    var lock=true;
    //监听
    rightbtn.onclick=function(){
      if(!lock) return;
      lock=false; 
      //给list加过渡,为什么还要再加一边过渡属性是因为最后一张图片会把过渡去掉
       list.style.transition='left .5 ease 0s'
       idx++;
       if(idx>4){
         //设置一个延时器,功能是将ul瞬间拉回0的位置
         setTimeout(function(){
           //取消过度,因为要让他进行瞬间移动 
           list.style.transition='none'  
           list.style.left=0;
           idx=0;
         },500);
       }
       list.style.left=-idx*650+'px';
       //函数节流
       setTimeout(function(){
          lock=true;
       },500);
    }
    leftbtn.onclick=function(){
      if(!lock) return;
      lock=false;
      if(idx==0){
        list.style.transition='none';
        list.style.left=-5*650+'px'; 
        idx=5;
        //设置一个延时器,延时时间为0毫秒
        setTimeout(function(){
          list.style.transition='left .5 ease 0s';
          idx=4;
          list.style.left=-idx*650+'px';
        },0);
      }else{
        idx--;
        list.style.left=-idx*650+'px';
      }
      //函数节流
      setTimeout(function(){
        lock=true;
      },500);
    }
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1回答

好帮手慕慕子

2021-12-12

同学你好,因为设置transition属性值,里面的时间没有添加单位s,导致无法实现效果,添加上就好了,如下:

https://img.mukewang.com/climg/61b5a84e0993a71913740420.jpg

https://img.mukewang.com/climg/61b5a867098756fa11420730.jpg


祝学习愉快~

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