<html>
<head><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>图片放大镜</title><style type="text/css">body{ padding: 0;margin: 0; 100%;height:100%;overflow: hidden; }.wrap{ text-align: center; }.wrap img{ 60%;cursor: crosshair; }.loupe{ position:absolute; pointer-events:none; visibility:hidden; z-index:999; 200px; height: 200px; border:3px solid #636363; border-radius:50%;}</style></head><body> <div class="loupe"></div> <div class="wrap">
</div></body></html><script type="text/javascript">$(document).ready(function(){ var vh=$(window).height() var vw=$(window).width() var imgh=$(".wrap img").height() var imgw=$(".wrap img").width() var beginX=vw*2/10 var endX=beginX+imgw var beginY=(vh-imgh)/2 var endY=beginY+imgh $(".wrap").css("margin-top",beginY+"px") //鼠标经过 document.addEventListener("mousemove", loupe , false); //触屏模式触发 document.addEventListener("touchmove", loupe , false); document.addEventListener("touchstart", loupe , false); document.addEventListener("touchend", function(e) { $(".loupe").css("visibility","hidden") }, false); function loupe(e){ var x,y if(e.type!="mousemove"){ x=e.touches[0].pageX y=e.touches[0].pageY } //如果支持触摸事件，则屏蔽鼠标经过事件，避免影响touchstart的效果 else if("ontouchend" in document){ return false; } //如果不支持触摸事件，则让鼠标经过事件正常触发 else{ x=e.clientX y=e.clientY } //判断鼠标或触摸点在图片区域，是则显示放大镜div层 if(x>beginX&&x<endX&&y>beginY&&y<endY){ var mx=100-(x-beginX)/imgw*1920 //1920为原图片宽度 var my=100-(y-beginY)/imgh*1200 //1200为原图片高度 $(".loupe").css("left",x-103+"px").css("top",y-103+"px").css('background',bg) $(".loupe").css("visibility","visible") }else{ $(".loupe").css("visibility","hidden") } }})</script>