JS实现图片放大查看

示例：https://wumaozheng.com/static-pages/image-magnifier.html
 <!DOCTYPE html>

 <html>

 <head>

     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

     <title>Image</title>

     <script language="javascript" src="https://cdn.bootcss.com/jquery/1.11.0/jquery.min.js"></script>

     <script language="javascript">

     $(function() {

         var offsetX = 20 - $("#imgtest").offset().left;

         var offsetY = 20 - $("#imgtest").offset().top;

         var size = 1.2 * $('#imgtest ul li img').width();

         $("#imgtest ul li").mouseover(function(event) {

             var $target = $(event.target);

             if ($target.is('img')) {

                 $("<img id='tip' src='" + $target.attr("src") + "'>").css({

                     "height": size,

                     "width": size,

                     "top": event.pageX + offsetX,

                     "left": event.pageY + offsetY,

                 }).appendTo($("#imgtest"));

             }

         }).mouseout(function() {

             $("#tip").remove();

         }).mousemove(function(event) {

             $("#tip").css({

                 "left": event.pageX + offsetX,

                 "top": event.pageY + offsetY

             });

         });

     })

     </script>

     <style type="text/css">

     img {

         cursor: pointer;

         height: 368px;

         width: 368px;

         position: absolute;

     }

     #imgtest {

         height: auto;

         width: auto;

         margin: 30px 60px 0px 60px;

         position: absolute;

     }

     #imgtest ul {

         position: relative;

         width: auto;

         height: auto;

         background: #00F;

     }

     #imgtest ul li {

         position: relative;

         height: 378px;

         width: 378px;

         list-style: none;

         float: left;

         margin: 3px;

     }

     </style>

 </head>

 <body>

     <div id="imgtest">

         <ul>

             <li><img src="http://inbmi.com/image/vp/1f029f78c164f4a9723d9af43fd2febe/5B800E3E/t51.2885-15/e35/31136663_1649816651776613_694881964250890240_n.jpg" /></li>

             <li><img src="http://inbmi.com/image/vp/4c9e38ab5c5d52eb30f671934dcb35bc/5B9AAD80/t51.2885-15/e35/31270267_220885218674663_609168203867750400_n.jpg" /></li>

             <li><img src="http://inbmi.com/image/vp/eba5901d056b5c740d6b671c66ac0137/5B77C34C/t51.2885-15/e35/31364150_1665566736868399_5092204927984336896_n.jpg" /></li>

             <li><img src="http://inbmi.com/image/vp/c82844d3912e0c9685b8a0f79f01caea/5B88819E/t51.2885-15/e35/31490408_366139313900670_1486728493155745792_n.jpg" /></li>

             <li><img src="http://inbmi.com/image/vp/4224804abad8cfbb4da15f8c2363dcae/5B8275CC/t51.2885-15/e35/30920518_160809141256123_1097812066267299840_n.jpg" /></li>

             <li><img src="http://inbmi.com/image/vp/4f90f49ec34f1adaed77e9cb92c7cccc/5B9D254E/t51.2885-15/e35/30591652_1850590825241799_3543379466950541312_n.jpg" /></li>

         </ul>

     </div>

 </body>

 </html>
巴特西

JS实现图片放大查看

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