原生JS实现的简单“瀑布流”布局
自pinterest网站爆红以来，国内一度掀起“仿PIN”狂潮，诸如花瓣、蘑菇街等等。正是如此，“瀑布流”式布局受到广大网民的青睐。众多知名JS库，也相继出现“瀑布流”布局插件，譬如jQuery的Masonry插件、KISSY的waterfall插件等。今天闲来无聊，我也自己动手弄了段原生JS代码，实现了简单的“瀑布流”布局效果，当然肯定不能和以上那些优秀插件相提并论，有兴趣的朋友，可以去看看，希望能带给你或多或少的收获。
转载自：http://www.oschina.net/code/snippet_114440_10309
效果预览： http://www.seejs.com/demos/waterfall/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Waterfall代码</title>
</head>
<body>
<style type="text/css">
.wf-main{
position: relative;
margin: 0 auto;
width: 990px;
overflow: hidden;
}
.wf-main .wf-cld{
position: absolute;
margin-bottom: 10px;
padding:5px 8px;
width: 214px;
left: -9999px;
top: -9999px;
line-height:18px;
border: 1px solid #999;
border-radius: 4px;
background-color: #ccc;
overflow: hidden;
}
.wf-cld .inner{
position: absolute;
left: -9999px;
top: -9999px;
margin-bottom: 5px;
width: 73px;
overflow: hidden;
border: 1px solid #f00;
border-radius: 3px;
}
.wf-cld .title{
margin: 0 0 5px;
padding: 5px;
width: 63px;
color: #f00;
font-size: 14px;
}
</style>
<div class="wf-main" id="wf-main">
<div class="wf-cld"><h2 style="color:#f50">1、瀑布流</h2></div>
<div class="wf-cld">2<br>2</div>
<div class="wf-cld">3<br>4<br>4</div>
<div class="wf-cld">4<br>4<br>4<br>4</div>
<div class="wf-cld">5<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">6<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">7<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">8<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">9<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">10<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">18<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">19<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">20<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld" id="wf-inner">
<h2 class="inner title">21、内部瀑布流</h2>
<div class="inner">21-1<br>1</div>
<div class="inner">21-2</div>
<div class="inner">21-3</div>
<div class="inner">21-4</div>
<div class="inner">21-5<br></div>
<div class="inner">21-6</div>
<div class="inner">21-7</div>
<div class="inner">21-8</div>
<div class="inner">21-9</div>
</div>
<div class="wf-cld">22<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">23<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">24<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">11<br>2<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">12<br>2<br>2<br>3<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">13<br>4<br>4<br>3<br>3<br>1<br>2<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">14<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">15<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">16<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
<div class="wf-cld">17<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4<br>4</div>
</div>
<script type="text/javascript">
function Waterfall(param){
this.id = typeof param.container == 'string' ? document.getElementById(param.container) : param.container;
this.colWidth = param.colWidth;
this.colCount = param.colCount || 4;
this.cls = param.cls && param.cls != '' ? param.cls : 'wf-cld';
this.init();
}
Waterfall.prototype = {
getByClass:function(cls,p){
var arr = [],reg = new RegExp("(^|\\s+)" + cls + "(\\s+|$)","g");
var nodes = p.getElementsByTagName("*"),len = nodes.length;
for(var i = 0; i < len; i++){
if(reg.test(nodes[i].className)){
arr.push(nodes[i]);
reg.lastIndex = 0;
}
}
return arr;
},
maxArr:function(arr){
var len = arr.length,temp = arr[0];
for(var ii= 1; ii < len; ii++){
if(temp < arr[ii]){
temp = arr[ii];
}
}
return temp;
},
getMar:function(node){
var dis = 0;
if(node.currentStyle){
dis = parseInt(node.currentStyle.marginBottom);
}else if(document.defaultView){
dis = parseInt(document.defaultView.getComputedStyle(node,null).marginBottom);
}
return dis;
},
getMinCol:function(arr){
var ca = arr,cl = ca.length,temp = ca[0],minc = 0;
for(var ci = 0; ci < cl; ci++){
if(temp > ca[ci]){
temp = ca[ci];
minc = ci;
}
}
return minc;
},
init:function(){
var _this = this;
var col = [],//列高
iArr = [];//索引
var nodes = _this.getByClass(_this.cls,_this.id),len = nodes.length;
for(var i = 0; i < _this.colCount; i++){
col[i] = 0;
}
for(var i = 0; i < len; i++){
nodes[i].h = nodes[i].offsetHeight + _this.getMar(nodes[i]);
iArr[i] = i;
}
for(var i = 0; i < len; i++){
var ming = _this.getMinCol(col);
nodes[i].style.left = ming * _this.colWidth + "px";
nodes[i].style.top = col[ming] + "px";
col[ming] += nodes[i].h;
}
_this.id.style.height = _this.maxArr(col) + "px";
}
};
new Waterfall({
"container":"wf-inner",
"colWidth":77,
"colCount":3,
"cls":"inner"
});
new Waterfall({
"container":"wf-main",
"colWidth":244,
"colCount":4
});
</script>
</body>
</html>