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话不多说，请看代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>放大镜-原生js封装</title>
<link rel="shortcut icon" href="../public/image/favicon.ico" type="images/x-icon"/>
<link rel="icon" href="../public/image/favicon.png" type="images/png"/>
<link rel="stylesheet" type="text/css" href="../public/style/cssreset-min.css">
<link rel="stylesheet" type="text/css" href="../public/style/common.css">
<style type="text/css">
/*公共*/
html{
height:100%;
}
body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, textarea, p, blockquote, th, td {
margin: 0;
padding: 0
}
body{
position: relative;
min-height:100%;
font-size:14px;
font-family: Tahoma, Verdana,"Microsoft Yahei";
color:#333;
}
a{
text-decoration: none;
color:#333;
}
.header{
width: 960px;
padding-top: 15px;
margin: 0 auto;
line-height: 30px;
text-align: right;
}
.header a{
margin: 0 5px;
}
.main{
width:960px;
margin: 50px auto 0;
}
.code{
border:1px dashed #e2e2e2;
padding:10px 5px;
margin-bottom:25px;
}
pre {
font-family: "Microsoft Yahei",Arial,Helvetica;
white-space: pre-wrap; /*css-3*/
white-space: -moz-pre-wrap; /*Mozilla,since1999*/
white-space: -pre-wrap; /*Opera4-6*/
white-space: -o-pre-wrap; /*Opera7*/
word-wrap: break-word; /*InternetExplorer5.5+*/
}
.example{
padding-top:40px;
margin-bottom:90px;
}
.example .call{
padding:18px 5px;
background:#f0f5f8;
}
.example h2{
padding-top:20px;
margin-bottom:7px;
}
.example table {
width:100%;
table-layout:fixed;
border-collapse: collapse;
border-spacing: 0;
border: 1px solid #cee1ee;
border-left: 0;
}
.example thead {
border-bottom: 1px solid #cee1ee;
background-color: #e3eef8;
}
.example tr {
line-height: 24px;
font-size: 13px;
}
.example tr:nth-child(2n) {
background-color: #f0f5f8;
}
.example tr th,.example tr td {
border-left: 1px solid #cee1ee;
word-break: break-all;
word-wrap: break-word;
padding:0 10px;
font-weight: normal;
}
.example tr th {
color: #555;
padding-top: 2px;
padding-bottom: 2px;
text-align: left;
}
/*公共*/
.magnifier-box{
margin-bottom: 15px;
}
.magnifier-container{
width: 400px;
height: 255px;
margin: 50px;
position: relative;
border: 1px solid #ccc;
}
.magnifier-small{
position: relative;
z-index: 1;
width: 100%;
height: 100%;
overflow: hidden;
}
.magnifier-small img{
/*max-width: 100%;
max-height: 100%;*/
}
.magnifier-mark {
position: absolute;
display: block;
width: 400px;
height: 255px;
background-color: #fff;
filter: alpha(opacity:0);
opacity: 0;
z-index: 10;
}
.magnifier-float-box {
display: none;
width: 160px;
height: 120px;
position: absolute;
background: #ffffcc;
border: 1px solid #ccc;
filter: alpha(opacity:50);
opacity: 0.5;
}
.magnifier-big-box {
display: none;
position: absolute;
top: 0;
left: 460px;
width: 400px;
height: 300px;
overflow: hidden;
border: 1px solid #ccc;
z-index: 1;
}
.magnifier-big-box img {
position: absolute;
z-index: 5;
}
.magnifier-thumb{}
.magnifier-thumb li{
display: inline-block;
width: 50px;
height: 50px;
vertical-align: middle;
line-height: 50px;
margin-right: 5px;
border: 2px solid #fff;
/*display: table-cell;*/
}
.magnifier-thumb li.active{
border-color: #f40;
}
.magnifier-thumb li img{
max-width: 50px;
max-height: 50px;
vertical-align: middle;
}
</style>
<script type="text/javascript">
/*封装代码*/
(function() {
var Magnifier = function(el, opts) {
var self = this;
var defaults = {
event: "mouseover",
}
opts = opts || {};
for (var w in defaults) {
if ("undefined" == typeof opts[w]) {
opts[w] = defaults[w];
}
}
this.params = opts;
this.container = r(el);
if (this.container.length > 1) {
var x = [];
return this.container.each(function() {
x.push(new Magnifier(this, opts))
}), x
}
this.containers = this.container[0];
this.contbox = this.container.find(".magnifier-container")[0];
this.conmain = this.container.find(".magnifier-container")[0];
this.init();
}
Magnifier.prototype = {
init: function() {
var self = this;
this.rendDom();
this.mark = this.container.find(".magnifier-mark")[0];
this.float_box = this.container.find(".magnifier-float-box")[0];
this.big_box = this.container.find(".magnifier-big-box");
this.small = this.container.find(".magnifier-small")[0];
this.big_Image = this.big_box.find("img")[0];
this.event();
},
//渲染dom
rendDom: function() {
var self = this;
var initimg = this.container.find(".magnifier-thumb li img")[0].getAttribute("src");
var initimgs = this.container.find(".magnifier-thumb li img")[0].getAttribute("data-source");
var small = document.createElement("div");
small.className = "magnifier-small";
var mark = document.createElement("div");
mark.className = "magnifier-mark";
var float = document.createElement("div");
float.className = "magnifier-float-box";
var img = document.createElement("img");
img.setAttribute("src", initimg)
small.appendChild(mark);
small.appendChild(float);
small.appendChild(img);
var big_box = document.createElement("div");
big_box.className = "magnifier-big-box";
var boximg = document.createElement("img");
boximg.setAttribute("src", initimgs);
big_box.appendChild(boximg);
this.conmain.appendChild(small);
this.conmain.appendChild(big_box);
this.boximg = this.container.find(".magnifier-small img")[0];
this.tabimg();
},
//执行切换图片
tabimg: function() {
var self = this;
this.tabimgs = this.conmain = this.container.find(".magnifier-thumb li");
for (var i = 0; i < this.tabimgs.length; i++) {
self.tabimgs[i].addEventListener(this.params.event, function() {
for (var j = 0; j < self.tabimgs.length; j++) {
self.tabimgs[j].className = "";
}
this.className = "active";
var onec = this.children[0].getAttribute("src");
var onecd = this.children[0].getAttribute("data-source");
self.change(onec, onecd);
}, false);
}
},
//改变大小图片
change: function(o, b) {
this.boximg.setAttribute("src", o);
this.big_Image.setAttribute("src", b);
},
//执行初始化鼠标事件
event: function() {
var self = this;
self.mark.addEventListener('mouseover', function() {
self.float_box.style.display = "block";
self.big_box[0].style.display = "block";
}, false);
self.mark.addEventListener('mouseout', function() {
self.float_box.style.display = "none";
self.big_box[0].style.display = "none";
}, false);
self.mark.addEventListener('mousemove', function(e) {
var e = e || window.event; //兼容多个浏览器的event参数模式
self.moveevent(e)
}, false);
},
//开始移动
moveevent: function(e) {
var self = this;
var left = e.clientX - this.contbox.offsetLeft - this.small.offsetLeft - this.float_box.offsetWidth / 2;
var top = e.clientY - this.contbox.offsetTop - this.small.offsetTop - this.float_box.offsetHeight / 2;
if (left < 0) {
left = 0;
} else if (left > (this.mark.offsetWidth - this.float_box.offsetWidth)) {
left = this.mark.offsetWidth - this.float_box.offsetWidth;
}
if (top < 0) {
top = 0;
} else if (top > (this.mark.offsetHeight - this.float_box.offsetHeight)) {
top = this.mark.offsetHeight - this.float_box.offsetHeight;
}
this.float_box.style.left = left + "px";
this.float_box.style.top = top + "px";
var percentX = left / (this.mark.offsetWidth - this.float_box.offsetWidth);
var percentY = top / (this.mark.offsetHeight - this.float_box.offsetHeight);
this.big_Image.style.left = -percentX * (this.big_Image.offsetWidth - this.big_box[0].offsetW