利用JS实现购物网站商品放大镜效果

news/2024/5/21 17:31:07/文章来源:https://blog.csdn.net/weixin_30332241/article/details/97654415

大家几乎都有在网上购物的经验，有的网站会有一个商品放大镜功能，

就是把鼠标移到图片上的时候，旁边会有另外一张大的图片展示，等同于

放大镜效果，那这样的效果怎样实现的呢，我把代码发给大家，请大家参考。

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>放大镜</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坐标var niubi2=e.clientY-offsetTL(minbox).top-meng.clientHeight/2;//蒙板的Y坐标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>