JQuery implements waterfall flow layout

HTML

 <div id="main">

         <div class="box">

             <div class="pic">

                 <img src="images/0.jpg" alt="">

             </div>

         </div>

         <div class="box">

             <div class="pic">

                 <img src="images/1.jpg" alt="">

             </div>

         </div>

         <div class="box">

             <div class="pic">

                 <img src="images/2.jpg" alt="">

             </div>

         </div>

         <div class="box">

             <div class="pic">

                 <img src="images/3.jpg" alt="">

             </div>

         </div>

         <div class="box">

             <div class="pic">

                 <img src="images/4.jpg" alt="">

             </div>

         </div>

         <div class="box">

             <div class="pic">

                 <img src="images/2.jpg" alt="">

             </div>

         </div>

 </div>

CSS

 * {

     margin: 0;

     padding: 0;

 }

 #main {

     position: relative;

 }

 .box {

     padding:15px 0 0 15px;

     float:left;

 }

 .pic {

     padding: 10px;

     border: 1px solid #ccc;

     border-radius: 5px;

     box-shadow: 0px 0px 5px #ccc;

     img {

         width:165px;

         height:auto;

     }

 }

JavaScript

 $(window).on("load",function () {

     waterfall();

     var dataInt = { "data":[{"src":"7.jpg"},{"src":"8.jpg"},{"src":"9.jpg"},{"src":"6.jpg"}]}

     //Simulate json data; < br / >
     $(window).on("scroll",function () {

         if(checkScrollSlide){

             $.each(dataInt.data,function (key,value) {

                 var oBox=$("<div>").addClass("box").appendTo($("#main"));

                 //JQuery supports continuous affix and implicit iteration. < br / >
                 var oPic=$("<div>").addClass('pic').appendTo($(oBox));

                 $("<img>").attr("src","images/"+$(value).attr("src")).appendTo(oPic);

             });

             waterfall();

         }

     })

 });

 //Flow layout main function; < br / >
 function waterfall () {

     var $boxs=$("#main>div");

     //Gets the immediate child element div.box under the #main element; < br / >
     //Gets the width of each column; < br / >
     var w=$boxs.eq(0).outerWidth();

     //OuterWidth () gets the width including padding and border; < br / >
     //var w=$boxs.eq(0).width();

     //Width () can only get the width defined for an element; < br / >
     var cols=Math.floor($(window).width()/w);

     //How many columns; < br / >
     $("#main").width(w*cols).css("margin","0 auto");

     //Set the width and center style of the #main element. < br / >
     var hArr=[];

     //The set of heights of each column; < br / >
     $boxs.each(function (index,value) {

     //Each box element is traversed; < br / >
     //To find the lowest point of all previous elements, then set this element below the lowest point; < br / >
         var h=$boxs.eq(index).outerHeight();

         //The height of each box element is 

         if (index<cols) {

             hArr[index]=h;

             //Determines the height of the first element in each column; < br / >
         } else{

             var minH=Math.min.apply(null,hArr);

             //Gets the minimum height in the column height array; < br / >
             var minHIndex=$.inArray(minH,hArr);

             //The $.inarray () method gets the index value of the element (minH) in the array (hArr). < br / >
             //console.log(value);

             //The value is the DOM object of all the box elements after the first line! ; < br / >
             $(value).css({

             //$(value): convert DOM object into jQuery object, then continue to use jQuery method; < br / >
                 "position":"absolute",

                 "top":minH+"px",

                 "left":minHIndex*w+"px"

             });

             hArr[minHIndex]+=$boxs.eq(index).outerHeight();

             //The height of the lowest height element + the height of the element just added to the lowest height = the new column height; < br / >
         };

     });

     // console.log(hArr);

 };

 function checkScrollSlide () {

     var $lastBox=$("#main>div").last();

     var lastBoxDis=$lastBox.offset().top+Math.floor($lastBox.outerHeight()/2);

     var scrollTop=$(window).scrollTop();

     var documentH=$(window).height();

     return (lastBoxDis<scrollTop+documentH)?true:false;

 }

Explain it in detail and refer to the notes carefully, so I won't pull it out on its own.