; 更新日期:2024/12/23">
(编辑:jimmy 日期: 2024/12/23 浏览:2)
本文实例为大家分享了js实现淘宝浏览商品放大镜的具体代码,供大家参考,具体内容如下
1、准备两张图片,其中一张图片分辨率为另一张图片的二倍。
2、前端页面布局
//box1位左侧原图,box2为右侧放大图额显示框,son为iv class="box1"> <div class="son"></div> <div class="ceng"></div> </div> <div class="box2"></div>
3、js写逻辑
let box1=document.querySelector(".box1"); let box2=document.querySelector(".box2"); let son=document.querySelector(".son"); let ceng=document.querySelector(".ceng"); //鼠标移入:son,box2出现 ceng.onmouseenter=function(){ son.style.display="block" box2.style.display="block" } //鼠标移出:son,box2消失 ceng.onmouseleave=function(){ son.style.display="none" box2.style.display="none" } //鼠标移动:son的位置随鼠标移动,box2背景图的位置变化 ceng.onmousemove=function(e){ let sw=e.clientX-son.offsetWidth/2 let sh=e.clientY-son.offsetHeight/2 if(sw>ceng.offsetWidth-son.offsetWidth){ sw=ceng.offsetWidth-son.offsetWidth } else if(sw<=0){ sw=0; } if(sh>ceng.offsetHeight-son.offsetHeight){ sh=ceng.offsetHeight-son.offHeight } else if(sh<=0){ sh=0; } son.style.left=sw+"px" son.style.top=sh+"px" box2.style.backgroundPosition=`${-2*sw}px ${-2*sh}px` }
完整代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>放大镜</title> </head> <style> *{ margin: 0; padding: 0; } .box1{ width: 500px; height:333px; /* border:1px solid red; */ background: url('shatan.jpg') no-repeat; position: relative; float: left; box-sizing: border-box } .son{ width: 100px; height: 100px; background-color: #fff; position: fixed; left:0; top:0; opacity: 0.7; display: none; } .ceng{ width: 100%; height: 100%; position: absolute; top: 0; left: 0; z-index: 100; } .box2{ width: 200px; height:200px; border:1px solid red; background: url('shatan1.jpg') no-repeat; float: left; display: none; } </style> <body> <div class="box1"> <div class="son"></div> <div class="ceng"></div> </div> <div class="box2"></div> </body> </html> <script> let box1=document.querySelector(".box1"); let box2=document.querySelector(".box2"); let son=document.querySelector(".son"); let ceng=document.querySelector(".ceng"); ceng.onmouseenter=function(){ son.style.display="block" box2.style.display="block" } ceng.onmouseleave=function(){ son.style.display="none" box2.style.display="none" } ceng.onmousemove=function(e){ let sw=e.clientX-son.offsetWidth/2 let sh=e.clientY-son.offsetHeight/2 if(sw>ceng.offsetWidth-son.offsetWidth){ sw=ceng.offsetWidth-son.offsetWidth } else if(sw<=0){ sw=0; } if(sh>ceng.offsetHeight-son.offsetHeight){ sh=ceng.offsetHeight-son.offHeight } else if(sh<=0){ sh=0; } son.style.left=sw+"px" son.style.top=sh+"px" box2.style.backgroundPosition=`${-2*sw}px ${-2*sh}px` } </script>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。