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@@ -0,0 +1,89 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+ <style>
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+ .small-img{
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+ width: 600px;
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+ height: 600px;
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+ position: relative;
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+ float: left;
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+ }
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+ .small-img img{
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+ width: 600px;
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+ height: 600px;
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+ position: absolute;
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+ top: 0;
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+ left: 0;
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+ }
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+ .small-img .box{
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+ width: 300px;
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+ height: 300px;
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+ background-color: #fff;
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+ opacity: 0.5;
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+ position: absolute;
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+ top: 0;
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+ left:0;
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+ }
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+ .big-img{
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+ margin-left: 100px;
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+ float: left;
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+ width: 600px;
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+ height: 600px;
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+ overflow: hidden;
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+ position: relative;
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+ }
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+ .big-img img{
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+ width: 1200px;
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+ height: 1200px;
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+ position: absolute;
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+ top: 0;
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+ left: 0;
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+ }
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+ </style>
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+</head>
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+<body>
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+ <div class="small-img">
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+ <img src="./image/niu.png" alt="img">
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+ <div class="box"></div>
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+ </div>
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+ <div class="big-img">
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+ <img class="big-pic" src="./image/niu.png" alt="img">
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+ </div>
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+ <script>
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+ var oSmallImg = document.getElementsByClassName("small-img")[0];
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+ var oBox = document.getElementsByClassName("box")[0];
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+ var oBigImg = document.getElementsByClassName("big-pic")[0];
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+
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+ oSmallImg.onmousemove = function(e){
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+ var x = e.clientX - 150;
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+ var y = e.clientY - 150;
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+
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+ // 控制半透明蒙版左侧最小值范围
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+ if(x<0){
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+ x = 0;
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+ }
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+ // 控制半透明蒙版顶部最小值范围
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+ if(y<0){
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+ y = 0;
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+ }
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+ // 控制半透明蒙版右侧最大值范围
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+ if(x>=300){
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+ x = 300
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+ }
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+ // 控制半透明蒙版顶部最大值范围
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+ if(y>=300){
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+ y = 300
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+ }
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+
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+
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+ oBox.style.left = x + "px";
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+ oBox.style.top = y + "px";
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+ oBigImg.style.left = -2*x + "px";
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+ oBigImg.style.top = -2*y + "px";
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+ }
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+ </script>
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+</body>
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+</html>
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