本文主要和大家分享原声js实现放大镜效果，主要以代码的方式和大家分享，希望能帮助到大家。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="js/tools.js" type="text/javascript" charset="utf-8"></script>
<script src="js/animate.js" type="text/javascript" charset="utf-8"></script>
<style>
*{margin: 0;padding:0}
.mg{
height:577px;
width:352px;
margin-left: 100px;
margin-top:100px;
}
ul{
height:68px;
width:348px;
display: flex;
justify-content: space-between;
position: absolute;
left:0;
top:0;
}
li{
list-style: none;
float:left;
border:2px solid white;
}
li img{
height:64px;
width:50px;
}
li:hover{
border: 2px solid red;
}
.mg-1{
height:450px;
width: 350px;
margin-bottom: 10px;
position:relative;
}
.mg-1>img{
height:450px;
width:350px;
}
.ri{
height:540px;
width:540px;
position: absolute;
left:372px;
top:0;
display: none;
overflow: hidden;
}
.ri>img{
position: absolute;
left:0;
right:0;
}
.mask{
height:200px;
width:200px;
background: #FEDE4F;
opacity:0.5;
position: absolute;
left:0;
top:0;
display: none;
}
.mg-1>p{
height:30px;
width: 30px;
position: absolute;
bottom:0;
right:0;
}
.mg-2{
height:68px;
width:350px;
margin-bottom:10px;
position: relative;
}
i{
display: block;
height:32px;
width:22px;
overflow: hidden;
}
.pre{
background: url(img/disabled-prev.png) no-repeat;
position: absolute;
left:0;
top:50%;
margin-top:-16px;
cursor: pointer;
}
.next{
background: url(img/disabled-next.png) no-repeat;
position: absolute;
right:0;
top:50%;
margin-top:-16px;
cursor: pointer;
}
.mid{
height:68px;
width:290px;
margin:0 auto;
overflow: hidden;
position: relative;
}
</style>
</head>
<body>
<p class='mg'>
<p class='mg-1'>
<img class='imgx' src="img/1a.jpg" alt="" />
<p class='mask'></p>
<p class="ri"><img class='imgd' src="img/5a601932N76367e55.jpg!cc_800x1026.jpg" alt="" /></p>
<p><img src="img/sprite-magnify.png" alt="" /></p>
</p>
<p class="mg-2">
<i class='pre'></i>
<p class='mid'>
<ul class="list">
<li><a href="#"> <img src="img/5a601932N76367e55.jpg!cc_50x64.jpg"/></a></li>
<li><a href="#"> <img src="img/5a601932N76367e55.jpg!cc_50x64.jpg"/></a></li>
<li><a href="#"> <img src="img/5a601934N2b80ec89.jpg!cc_50x64.jpg"/></a></li>
<li><a href="#"> <img src="img/5a601934N2b80ec89.jpg!cc_50x64.jpg"/></a></li>
<li><a href="#"> <img src="img/59c35a89N2e519554.jpg!cc_50x64.jpg"/></a></li>
<li><a href="#"> <img src="img/5a5f011fN971a30f5.jpg!cc_50x64.jpg"/></a></li>
</ul>
</p>
<i class='next'></i>
</p>
</p>
<script type="text/javascript">
window.onload=function(){
var imgdWidth=350/200*540;
var imgdHeight=450/200*540;
var imgx=document.getElementsByClassName('imgx')[0];
var imgd=document.getElementsByClassName('imgd')[0];
imgd.style.width=imgdWidth+'px';
imgd.style.height=imgdHeight+'px';
var mark=document.getElementsByClassName('mask')[0];
var mg1=document.getElementsByClassName('mg-1')[0];
var mg=document.getElementsByClassName('mg')[0];
var ri=document.getElementsByClassName('ri')[0];
mg1.onmouseenter=function(){
mark.style.display='block';
ri.style.display='block';
mg1.onmousemove=function(event){
var event=event||window.event;
mark.style.left=event.pageX-100-mg.offsetLeft+'px';
mark.style.top=event.pageY-100-mg.offsetTop+'px';
if((event.pageX-100-mg.offsetLeft)<=0){
mark.style.left=0;
}else if((event.pageX-100-mg.offsetLeft)>=150){
mark.style.left=150+'px';
}
if((event.pageY-100-mg.offsetTop<=0)){
mark.style.top=0;
}else if((event.pageY-100-mg.offsetTop>=250)){
mark.style.top=250+'px';
}
imgd.style.left=-parseInt(mark.style.left)*540/200+'px';
imgd.style.top=-parseInt(mark.style.top)*540/200+'px';
}
}
mg1.onmouseleave=function(){
mark.style.display='none';
ri.style.display='none';
}
var list=document.getElementsByClassName('list')[0];
var imgs=list.getElementsByTagName('img');
for(let i=0;i<imgs.length;i++){
imgs[i].onmouseover=function(){
imgx.src='img/'+(i+1)+'a.jpg';
}
}
var pre=document.getElementsByClassName('pre')[0];
var next=document.getElementsByClassName('next')[0];
var left=getStyle(list,'left');
pre.onclick=function(){
animate(list,{left:-60});
}
next.onclick=function(){
animate(list,{left:0});
}
}
</script>
</body>
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