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Implementing waterfall flow layout based on JavaScript_javascript skills

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May 16, 2016 pm 03:20 PM

javascript Waterfalls flow

The example in this article explains the detailed code for implementing waterfall flow layout in native JavaScript and shares it with you for your reference. The specific content is as follows

Rendering:

Specific code:

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <link rel="stylesheet" type="text/css" href="css/style.css">
  <script type="text/javascript" src="js/app.js"></script>
</head>
<body>
  <div id="container">
    <div class="box">
       <div class="box_img"> <img src="images/1.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/2.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/3.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/4.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/5.jpg" alt=""></div>
    </div>
  <div class="box">
       <div class="box_img"> <img src="images/6.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/7.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/8.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/9.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/10.jpg" alt=""></div>
    </div>

    <div class="box">
       <div class="box_img"> <img src="images/1.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/2.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/3.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/4.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/5.jpg" alt=""></div>
    </div>
  <div class="box">
       <div class="box_img"> <img src="images/6.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/7.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/8.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/9.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/10.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/1.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/2.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/3.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/4.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/5.jpg" alt=""></div>
    </div>
  <div class="box">
       <div class="box_img"> <img src="images/6.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/7.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/8.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/9.jpg" alt=""></div>
    </div>
    <div class="box">
       <div class="box_img"> <img src="images/10.jpg" alt=""></div>
    </div>


  </div>
</body>
</html>

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CSS code:

*{
   margin: 0px;
   padding: 0px;
}

#container{
   position: relative;
}

.box{
   padding: 5px;
   float: left;
}
.box_img{
   padding: 5px;
   border: 1px solid #cccccc;
   box-shadow: 0 0 5px #ccc;
   border-radius: 5px;
}

.box_img img{
   width: 150px;
   height:auto;
}

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js code:

window.onload=function(){
   imgLocation("container","box");
   var imgData={
     "data":[
       {"src":"2.jpg"},
       {"src":"3.jpg"},
       {"src":"4.jpg"},
       {"src":"5.jpg"},
       {"src":"6.jpg"},
       {"src":"7.jpg"},
       {"src":"8.jpg"},
     ]
   };
   window.onscroll=function(){
    if (checkFlag()) {
      var cparent=document.getElementById("container");
      for (var i = 0; i < imgData.data.length; i++) {
         var ccontent=document.createElement("div");
         ccontent.className="box";
         cparent.appendChild(ccontent);
         var boximg=document.createElement("div");
         boximg.className="box_img";
         ccontent.appendChild(boximg);
         var img=document.createElement("img");
         img.src="images/"+imgData.data[i].src;
         boximg.appendChild(img);
      } 
       imgLocation("container","box");
    }
   }
}

function checkFlag(){
   var cparent=document.getElementById("container");
   var ccontent=getChildnode(cparent,"box");
   var lastContentHeight=ccontent[ccontent.length-1].offsetTop;
   var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;
   var pageHeight=document.documentElement.clientHeight||document.body.clientHeight;
   if (lastContentHeight<scrollTop+pageHeight) {
    return true;
   }
}
function imgLocation(parent,content){
     var cparent=document.getElementById(parent);
     var ccontent=getChildnode(cparent,content);
     var imgWidth=ccontent[0].offsetWidth;
     var cols=Math.floor(document.documentElement.clientWidth/imgWidth);
     cparent.style.cssText="width:"+imgWidth*cols+"px;margin:0 auto";

   //把第二排的左起第一张图片放到第一排高度最小的那张下面
     var imgHeightArr=[];
     for (var i = 0; i < ccontent.length; i++) {
        if (i<cols) {
            imgHeightArr[i]=ccontent[i].offsetHeight;          
        }else{
            var minHeight=Math.min.apply(null,imgHeightArr);
            var minHeightIndex=getMinHeightLoc(imgHeightArr,minHeight);
            console.log("minHeightIndex"+minHeightIndex);
      ccontent[i].style.position="absolute";
      ccontent[i].style.top=minHeight+"px";
      ccontent[i].style.left=ccontent[minHeightIndex].offsetLeft+"px";
      imgHeightArr[minHeightIndex]=imgHeightArr[minHeightIndex]+ccontent[i].offsetHeight;
        console.log(imgHeightArr[i]);
        console.log("高度最低:"+minHeight);
        }

    }

}

function getChildnode(parent,content){
   var contentArr=[];
   var allcontent=parent.getElementsByTagName("*");
  for (var i = 0; i < allcontent.length; i++) {
   if(allcontent[i].className==content){
      contentArr.push(allcontent[i]);
   }
  };

  return contentArr;
}

function getMinHeightLoc(imgHeightArr,minHeight){
   for(var i in imgHeightArr){
      if (imgHeightArr[i]==minHeight) {
       return i;
      }
   }
}

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I hope this article will be helpful to everyone learning JavaScript programming.

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