用JS實(shí)現(xiàn)購物網(wǎng)站商品放大鏡效果

2020-07-27 21:26:32

字體：大中小

供稿：網(wǎng)友

放大鏡效果就是把鼠標(biāo)移到圖片上的時候，旁邊會有另外一張大的圖片展示，放大鏡效果，那這樣的效果怎樣實(shí)現(xiàn)的呢，我把代碼發(fā)給大家，請大家參考。

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>放大鏡</title> <style> *{margin:0;padding: 0;} #warp{width: 1184px;height:500px;margin:50px auto 0;background-color: #ccc;overflow: hidden;padding: 10px;position: relative;} #warp #minbox{width: 350px;height: 350px;float: left;position: relative;} #maxbox{width: 400px;height: 400px;position: absolute;left: 380px;overflow: hidden;display: none;} #maxbox img{width: 800px;height: 800px;position: absolute;} #con{float: left;margin-left: 20px;} #meng{width: 175px;height: 175px;position: absolute;background-color:yellow;opacity:0.4;filter:alpha(opacity=40);left: 0;top: 0;display: none;} </style></head><body> <div id="warp"> <div id="minbox">  <img src="images/min.jpg" alt="">  <p id="meng"></p> </div> <div id="maxbox">  <img src="images/max.jpg" alt=""> </div> <div id="con">  <img src="images/msg.png" alt=""> </div> </div> <script> var minbox=document.getElementById('minbox'); var meng=document.getElementById('meng'); var maxbox=document.getElementById('maxbox'); var maximg=maxbox.getElementsByTagName('img')[0]; var minimg=minbox.getElementsByTagName('img')[0]; function offsetTL(obj){  var ofL=0,ofT=0;  while(obj){  ofL+=obj.offsetLeft+obj.clientLeft;  ofT+=obj.offsetTop+obj.clientTop;  obj=obj.offsetParent;  }  return{left:ofL,top:ofT}; } minbox.onmousemove=function(e){  var e=e||window.event;  meng.style.display='block';  maxbox.style.display='block';  var niubi1=e.clientX-offsetTL(minbox).left-meng.clientWidth/2;//蒙板的X坐標(biāo)  var niubi2=e.clientY-offsetTL(minbox).top-meng.clientHeight/2;//蒙板的Y坐標(biāo)  var bili=maximg.clientWidth/minimg.clientWidth;  if (niubi1<=0) {  niubi1=0;  }else if (niubi1>=minbox.clientWidth-meng.clientWidth) {  niubi1=minbox.clientWidth-meng.clientWidth;  }  if (niubi2<=0) {  niubi2=0;  }else if (niubi2>=minbox.clientHeight-meng.clientHeight) {  niubi2=minbox.clientHeight-meng.clientHeight;  }  console.log(niubi1);  console.log(niubi2);  meng.style.left=niubi1+'px';  meng.style.top=niubi2+'px';  maximg.style.left=-parseInt(meng.style.left)*bili+'px';  maximg.style.top=-parseInt(meng.style.top)*bili+'px'; } minbox.onmouseout=function(){  meng.style.display='none';  maxbox.style.display='none'; } </script></body></html>

效果如下：

希望本文所述對大家javascript程序設(shè)計有所幫助。