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Learn more about js waterfall flow layout

高洛峰
Release： 2017-01-03 10:36:00
Original
1367 people have browsed it

The examples in this article share with you the js waterfall flow layout learning materials for your reference. The specific content is as follows

Features: equal width and unequal height.
Implementation method: Javascript/Jquery/CSS3 multi-column layout.
Sample website: Huaban.com -->Category

1. JS to implement waterfall flow

index.html: Page structure 

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>瀑布流布局</title>
  <link rel="stylesheet" href="styles/layout.css">
</head>
<body>
  <div id="main">
    <div><div><img src="../waterFall/pic/0.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/1.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/2.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/3.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/4.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/5.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/6.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/7.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/8.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/9.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/10.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/11.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/12.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/13.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/14.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/15.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/16.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/17.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/18.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/19.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/20.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/21.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/22.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/23.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/24.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/25.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/26.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/27.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/28.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/29.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/30.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/31.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/32.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/33.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/34.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/35.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/36.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/37.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/38.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/39.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/40.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/41.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/42.jpg" alt=""></div></div>
    <div><div><img src="../waterFall/pic/43.jpg" alt=""></div></div>
  </div>
  <script src="scripts/waterfall.js"></script>
</body>
</html>
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layout. css: page element style 

*{
  pdding:0;
  margin:0;
}
div#main{
  position: relative;
}
div.box{
  padding:15px 0 0 15px;
  float: left;
}
div.pic{
  padding:10px;
  border:1px solid #ccc;
  border-radius:5px;
  box-shadow: 0 0 5px #ccc;
}
.pic img{
  height:auto;
  width:165px;
}
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waterfall.js

window.onload=function(){
  waterFall(&#39;main&#39;,&#39;box&#39;);
  //模拟后台相应数据json
  var dataInt={
    "data":
    [
     {"src":"0.jpg"},
     {"src":"1.jpg"},
     {"src":"2.jpg"},
     {"src":"3.jpg"},
     {"src":"4.jpg"},
     {"src":"5.jpg"},
     {"src":"6.jpg"}
    ]
  }
  window.onscroll=function(){
    if(checkScrollSlide){
      //将数据块渲染到当前页面的尾部
     var oParent=document.getElementById("main");
     for(var i=0;i<dataInt.data.length;i++){
       var oBox=document.createElement("div");
       oBox.className="box";
       oParent.appendChild(oBox);
       var oPic=document.createElement("div");
       oPic.className="pic";
       oBox.appendChild(oPic);
       var img=document.createElement("img");
       img.setAttribute("src",dataInt.data[i]);
       img.src="pic/"+dataInt.data[i].src;
       oPic.appendChild(img);
     }
     dataInt=null;//清空数据块，防止无限加载
     waterFall(&#39;main&#39;,&#39;box&#39;);//对页面新元素进行布局渲染
    }
  }
}
function waterFall(parent,box){
  //将main下的class为box的所有元素取出来
  var oParent=document.getElementById(parent);
  var oBoxs=getByClass(oParent,box);
  console.log(oBoxs.length);
  //计算整个页面显示的列数（页面宽/box宽）
  var oBoxW=oBoxs[0].offsetWidth;
  // console.log(oBoxW);
  var cols=Math.floor(document.documentElement.clientWidth/oBoxW);
  // console.log(cols);
  //设置main的宽
  oParent.style.cssText="width:"+oBoxW*cols+"px;margin:0 auto;"
  var hArr=[];//存放每列高度的数组
  for(var i=0;i<oBoxs.length;i++){
    if(i<cols){
      hArr.push(oBoxs[i].offsetHeight);
    }else{
      var minH=Math.min.apply(null,hArr);//获取当前数组最小高度值
      // console.log(minH);
      var index=getMinhIndex(hArr,minH);//获取数组最小高度的索引
      //console.log(index);
      oBoxs[i].style.position="absolute";//将之后的图片依次绝对定位
      oBoxs[i].style.top=minH+"px";
      oBoxs[i].style.left=index*oBoxW+"px";//计算新图片所在的位置并赋值
      hArr[index]+=oBoxs[i].offsetHeight;//变化数组列的高度值，因为加上了一张图片
    }
    //console.log(hArr);
  }
 
}
//根据class获取元素
function getByClass(parent,clsName){
  var boxArr=new Array(),//用来存储获取到的所有class为box的元素
    oElements=parent.getElementsByTagName("*");
    for(var i=0;i<oElements.length;i++){
      if(oElements[i].className==clsName){
        boxArr.push(oElements[i]);
      }
    }
  return boxArr;
}
function getMinhIndex(arr,val){
  for(var i=0;i<arr.length;i++){
    if(arr[i]==val){
      return i;
    }
  }
 
}
//检测是否具备滚动条加载数据块条件
function checkScrollSlide(){
  var oParent=document.getElementById("main");
  var oBoxs=getByClass(oParent,"box");
  var lastBoxH=oBoxs[oBoxs.length-1].offsetTop+Math.floor(oBoxs[oBoxs.length-1].offsetHeight/2);
  var scrollTop=document.body.scrollTop||document.documentElement.scrollTop;//混杂模式和标准模式下的scrollTop获取
  //console.log(scrollTop);
  var height=document.body.clientHeight||document.documentElement.clientHeight;//混杂模式和标准模式下的浏览器窗口高度获取
  return (lastBoxH<scrollTop+height)?true:false;//检测最后一个box高度是否小于滚动高度+窗口高度，返回布尔值
 
}
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2. JQuery 

$( window ).on( "load", function(){
  waterfall(&#39;main&#39;,&#39;pin&#39;);
  var dataInt={&#39;data&#39;:[{&#39;src&#39;:&#39;1.jpg&#39;},{&#39;src&#39;:&#39;2.jpg&#39;},{&#39;src&#39;:&#39;3.jpg&#39;},{&#39;src&#39;:&#39;4.jpg&#39;}]};
  window.onscroll=function(){
    if(checkscrollside()){
      $.each( dataInt.data, function( index, value ){
        var $oPin = $(&#39;<div>&#39;).addClass(&#39;pin&#39;).appendTo( $( "#main" ) );
        var $oBox = $(&#39;<div>&#39;).addClass(&#39;box&#39;).appendTo( $oPin );
        $(&#39;<img>&#39;).attr(&#39;src&#39;,&#39;./images/&#39; + $( value).attr( &#39;src&#39;) ).appendTo($oBox);
      });
      waterfall();
    };
  }
});
 
/*
  parend 父级id
  pin 元素id
*/
function waterfall(parent,pin){
  var $aPin = $( "#main>div" );
  var iPinW = $aPin.eq( 0 ).width();// 一个块框pin的宽
  var num = Math.floor( $( window ).width() / iPinW );//每行中能容纳的pin个数【窗口宽度除以一个块框宽度】
  //oParent.style.cssText=&#39;width:&#39;+iPinW*num+&#39;px;ma rgin:0 auto;&#39;;//设置父级居中样式：定宽+自动水平外边距
  $( "#main" ).css({
    &#39;width:&#39; : iPinW * num,
    &#39;margin&#39;: &#39;0 auto&#39;
  });
 
  var pinHArr=[];//用于存储 每列中的所有块框相加的高度。
 
  $aPin.each( function( index, value ){
    var pinH = $aPin.eq( index ).height();
    if( index < num ){
      pinHArr[ index ] = pinH; //第一行中的num个块框pin 先添加进数组pinHArr
    }else{
      var minH = Math.min.apply( null, pinHArr );//数组pinHArr中的最小值minH
      var minHIndex = $.inArray( minH, pinHArr );
      $( value ).css({
        &#39;position&#39;: &#39;absolute&#39;,
        &#39;top&#39;: minH + 15,
        &#39;left&#39;: $aPin.eq( minHIndex ).position().left
      });
      //数组 最小高元素的高 + 添加上的aPin[i]块框高
      pinHArr[ minHIndex ] += $aPin.eq( index ).height() + 15;//更新添加了块框后的列高
    }
  });
}
 
function checkscrollside(){
  var $aPin = $( "#main>div" );
  var lastPinH = $aPin.last().get(0).offsetTop + Math.floor($aPin.last().height()/2);//创建【触发添加块框函数waterfall()】的高度：最后一个块框的距离网页顶部+自身高的一半(实现未滚到底就开始加载)
  var scrollTop = $( window ).scrollTop()//注意解决兼容性
  var documentH = $( document ).height();//页面高度
  return (lastPinH < scrollTop + documentH ) ? true : false;//到达指定高度后 返回true，触发waterfall()函数
}
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3. CSS multi-column layout 

.container{
  -webkit-column-width:160px;
  -moz-column-width:160px; 
   -webkit-column-gap:5px;
   -moz-column-gap:5px;
}
 
 
/*数据块 砖块*/
 
.container div{width:160px;
        margin:4px 0;}
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[css3 and js implementation Comparison of methods】
--css3 method--
1: No calculation required, the browser automatically calculates, just set 1 column width, high performance
2: Column width changes with the browser width size Change, the user experience is not good;
3: The pictures are sorted in vertical order, disrupting the order of picture display
4. Picture loading still requires js
--js method--
js implemented waterfall Streaming does not have the above shortcomings, but the performance is relatively poor!

The above is the entire content of this article. I hope it will be helpful to everyone's learning. I also hope that everyone will support the PHP Chinese website.

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Related labels：
js 瀑布流 布局
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