点击第一个链接出来第一个图片，以此类推，现在是只出来最后一个图片，感谢大家指点。

维护员菜gou一枚 2023-10-23 10:07:49

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        .box1 ul{
            list-style: none;
        }
        .box1 ul li {

        
            display: inline-block;
        }
        .box1 ul li a{
            text-decoration: none;
            transition: all 1s;
            
            
            
        
        }
        .line{
            border-top: 2px solid rgb(42, 146, 70);
            width: 20px;
            
            transition: all 0.2s;
            display: none;
            /*transform: translateX();*/    
             
 }
       .active{
        background-color: red;
        display: block;
        border-top:  4px solid rgb(42, 146, 70);;
       }
      img{width: 200px;
      height: 200px;}
    </style>
</head>
<body>
    <div class="box1"><ul>
        <!-- 点击a链接不跳转 -->
        <li><a href="javascript:;"id="1" class="a">12</a></li>
        <li><a href="javascript:;"id="2" class="b">33</a></li>
        <li><a href="javascript:;"id="3" class="c">44</a></li>
        <li><a href="javascript:;"id="4" class="d">55</a></li>
        <div class="line"></div>
    </ul></div>
    <div class="box2">
    <ul >
      
        <li><img src="1.jpg" alt=""style="display: none;"></li>
        <li><img src="2.jpg" alt="" style="display: none;"></li>
        <li><img src="3.jpg" alt=""style="display: none;"></li>
        <li><img src="4.jpg" alt=""style="display: none;"></li>
      
    </ul>
</div>
    <script>
        
        let img = document.querySelectorAll(".box2 ul li img");
        let ul =document.querySelector(".box1 ul");
        let line=document.querySelector(".line");
        line.style.backgroundcolor="green";
        ul.addEventListener("click",function(e){
            if(e.target.tagName==="A"){
                
                console.log(e.target.offsetLeft);
                console.log(e.target.clientLeft);
                console.log(e.target.scrollWidth);
                
                

                            // 利用offsetleft左边距来移动line元素
                line.classList.add("active");
                line.style.transform=`translateX(${e.target.offsetLeft}px)`;
            }
            
           
            
            
        })
ul.addEventListener("click",function(event){
    
                if(event.target.id="1"){
                        img[0].style.display="block"
                        img[1].style.display="none"
                        img[2].style.display="none"
                        img[3].style.display="none"
                        console.log("1");
                    }
                if(event.target.id="2"){
                        img[1].style.display="block"
                        img[0].style.display="none"
                        img[2].style.display="none"
                        img[3].style.display="none"
                        console.log("2");
                    }
                    if(event.target.id="3"){
                
                        img[2].style.display="block"
                        img[0].style.display="none"
                        img[1].style.display="none"
                        img[3].style.display="none"
                        console.log("3");
                }
                if(event.target.id="4"){
                    
                    img[3].style.display="block";
                    img[0].style.display="none";
                    img[1].style.display="none";
                    img[2].style.display="none";
                }
        
                
                    
                
})
        
    </script>
</body>
</html>

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