js仿淘宝商品放大预览功能
程序员文章站
2022-06-29 22:59:05
将鼠标移动至图片区域可放大预览
效果图：
代码如下：
<...
将鼠标移动至图片区域可放大预览
效果图：
代码如下：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>title</title>
<style>
*{padding:0; margin:0;}
#img1{width:300px; height:200px;}
#sp1{width:60px; height:40px; position: absolute; left:0; top:0; background: rgba(62, 55, 58, 0.4)
}
#img2{width:2250px; height:1500px; position: absolute;}
div{width:450px; height:300px; position: absolute; left:310px; top:0; overflow: hidden; border:2px solid black; display: none;}
</style>
<script>
window.onload=function(){
var img1 = document.getelementbyid('img1');
var img2 = document.getelementbyid('img2');
var sp = document.getelementbyid('sp1');
var obox = document.getelementbyid('box');
sp.onmouseover=function(){
obox.style.display='block';
};
sp.onmouseout=function(){
obox.style.display='none';
};
document.onmousemove=function(ev){
var x = (ev.clientx || event.clientx)-sp.offsetwidth/2;
var y = (ev.clienty || event.clienty)-sp.offsetheight/2;
if((ev.clientx || event.clientx)<sp.offsetwidth/2){
x = 0;
}
if((ev.clientx || event.clientx)>img1.offsetwidth-sp.offsetwidth/2){
x = img1.offsetwidth-sp.offsetwidth;
}
if((ev.clienty || event.clienty)<sp.offsetheight/2){
y = 0;
}if((ev.clienty || event.clienty)>img1.offsetheight-sp.offsetheight/2){
y = img1.offsetheight-sp.offsetheight;
}
if((ev.clientx || event.clientx)<300 && (ev.clienty || event.clienty)<200) {
sp.style.left = x + 'px';
sp.style.top = y + 'px';
img2.style.left = -x * (img2.offsetwidth / img1.offsetwidth) + 'px';
img2.style.top = -y * (img2.offsetheight / img1.offsetheight) + 'px';
}
}
}
</script>
</head>
<body>
<img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1489083204637&di=244fe324db033fc826de48e90d2373f0&imgtype=0&src=http%3a%2f%2fpic2015.5442.com%2f2016%2f0328%2f025%2f5.jpg%2521960.jpg
" alt="" id="img1">
<span id="sp1"></span>
<div id="box">
<img src="https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1489083204637&di=244fe324db033fc826de48e90d2373f0&imgtype=0&src=http%3a%2f%2fpic2015.5442.com%2f2016%2f0328%2f025%2f5.jpg%2521960.jpg
" alt="" id="img2">
</div>
</body>
</html>
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