js拖动实现左右图片对比效果
分类：实例代码
分享一段代码实例，它实现了通过拖动实现左右图片光线对比效果。
先不说这样的功能有没有实用性，不过看起来挺不错的，就分享一下。
代码实例如下:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.pipipi.net/" />
<title>前端教程网</title>
<style type="text/css">
* {
margin: 0;
padding: 0;
}
.left {
float: left;
}
#topDiv {
width: 540px;
height: 295px;
position: relative;
margin-right: 30px;
}
#original {
width: 100%;
height: 100%;
background: url(demo/js/img/serenity.JPG) no-repeat;
}
#effect {
position: absolute;
top: 0;
left: 0;
width: 300px;
height: 295px;
z-index: 100;
background: url(demo/js/img/cinematic.JPG) no-repeat;
border-right: 1px solid #fff;
}
#effect > span {
display: inline-block;
width: 20px;
height: 20px;
position: absolute;
top: 150px;
right: -10px;
z-index: 200;
cursor: pointer;
background: url("demo/js/img/drag.png") no-repeat;
}
#effectImageDiv li {
float: left;
width: 55px;
height: 70px;
cursor: pointer;
list-style: none;
}
#effect1 {
background: url(demo/js/img/cinematic.png) no-repeat;
}
#effect2 {
background: url(demo/js/img/mono.png) no-repeat;
}
#effect3 {
background: url(demo/js/img/analog.png) no-repeat;
}
</style>
<script>
window.onload = function() {
function getId(id) {
var ele = document.getElementById(id);
return ele;
}
getId("drag").onmousedown = function(e) {
e = e || window.event;
document.onmousemove = function(e) {
e = e || window.event;
if (e.clientY < 290 && e.clientX < 540 && e.clientY > 0 && e.clientX > 0) {
getId("drag").style.top = e.clientY + "px";
getId("effect").style.width = e.clientX + 'px';
}
}
}
document.onmouseup = function() {
document.onmousemove = null;
document.onmosuseup = null;
}
getId("effect1").onclick = function() {
getId("effect").style.background = "url(demo/js/img/cinematic.JPG) no-repeat"
}
getId("effect2").onclick = function() {
getId("effect").style.background = "url(demo/js/img/mono.JPG) no-repeat"
}
getId("effect3").onclick = function() {
getId("effect").style.background = "url(demo/js/img/analog.JPG) no-repeat"
}
}
</script>
</head>
<body>
<div id="topDiv" class="left">
<div id="original"></div>
<div id="effect"><span id="drag" class="left"></span> </div>
</div>
<div id="effectImageDiv" class="left">
<h2>点击这里切换图片效果 </h2>
<br />
<br />
<ul>
<li class="effect" id="effect1"></li>
<li class="effect" id="effect2"></li>
<li class="effect" id="effect3"></li>
</ul>
</div>
</body>
</html>
js拖动实现左右图片对比效果，这样的场景在实际项目中还是用的比较多的，关于js拖动实现左右图片对比效果就介绍到这了。
js拖动实现左右图片对比效果属于前端实例代码，有关更多实例代码大家可以查看。