原生JS实现美图瀑布流布局赏析
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。
1. js代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-">
<title>Waterfall代码</title>
</head>
<body>
<style type="text/css">
.wf-main{
position: relative;
margin: auto;
width: px;
overflow: hidden;
}
.wf-main .wf-cld{
position: absolute;
margin-bottom: px;
padding:px px;
width: px;
left: -px;
top: -px;
line-height:px;
border: px solid #;
border-radius: px;
background-color: #ccc;
overflow: hidden;
}
.wf-cld .inner{
position: absolute;
left: -px;
top: -px;
margin-bottom: px;
width: px;
overflow: hidden;
border: px solid #f;
border-radius: px;
}
.wf-cld .title{
margin: px;
padding: px;
width: px;
color: #f;
font-size: px;
}
</style>
<div class="wf-main" id="wf-main">
<div class="wf-cld"><h style="color:#f">、瀑布流</h></div>
<div class="wf-cld"><br></div>
<div class="wf-cld"><br><br></div>
<div class="wf-cld"><br><br><br></div>
<div class="wf-cld"><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld" id="wf-inner">
<h class="inner title">、内部瀑布流</h>
<div class="inner">-<br></div>
<div class="inner">-</div>
<div class="inner">-</div>
<div class="inner">-</div>
<div class="inner">-<br></div>
<div class="inner">-</div>
<div class="inner">-</div>
<div class="inner">-</div>
<div class="inner">-</div>
</div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></div>
<div class="wf-cld"><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></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 || ;
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 = ; i < len; i++){
if(reg.test(nodes[i].className)){
arr.push(nodes[i]);
reg.lastIndex = ;
}
}
return arr;
},
maxArr:function(arr){
var len = arr.length,temp = arr[];
for(var ii= ; ii < len; ii++){
if(temp < arr[ii]){
temp = arr[ii];
}
}
return temp;
},
getMar:function(node){
var dis = ;
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[],minc = ;
for(var ci = ; 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 = ; i < _this.colCount; i++){
col[i] = ;
}
for(var i = ; i < len; i++){
nodes[i].h = nodes[i].offsetHeight + _this.getMar(nodes[i]);
iArr[i] = i;
}
for(var i = ; 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":,
"colCount":,
"cls":"inner"
});
new Waterfall({
"container":"wf-main",
"colWidth":,
"colCount":
});
</script>
</body>
</html>
2. [图片] 瀑布流.jpg
