JS实现瀑布流布局实例

程序员文章站 2022-04-08 21:10:20

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本文主要为大家详细介绍了JS实现瀑布流布局效果展示，具有一定的参考价值，感兴趣的小伙伴们可以参考一下，希望能帮助到大家。

html部分

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>瀑布流布局</title>
  <script src="wallpoll.js"></script>
  <link rel="stylesheet" href="wallpoll.css" rel="external nofollow" >
</head>
<body>
  <p id="main">
    <p class="box">
      <p class="pic">
        <img src="wallpoll/0.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/0.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/1.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/2.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/3.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/4.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/5.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/6.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/7.jpg" alt="">
      </p>
    </p>

    <p class="box">
      <p class="pic">
        <img src="wallpoll/8.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/9.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/10.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/11.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/12.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/13.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/14.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/15.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/16.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/17.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/18.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/19.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/20.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/21.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/22.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/23.jpg" alt="">
      </p>
    </p>
    <p class="box">
      <p class="pic">
        <img src="wallpoll/24.jpg" alt="">
      </p>
    </p>
  </p>
</body>
</html>

css部分

*{
  padding:0px;
  margin:0px;
}
.main{
  position:relative;
}
.box{
  padding:15px 0 0 10px;
  float:left;
}
.pic{
  padding:10px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-shadow: 0 0 5px #ccc;
  /*float:left;*/
}
img{
  width:170px;
  height:auto;
}

JS部分

window.onload=function(){
  waterfall('main','box');
  var dataInt={"data":[{"src":"0.jpg"},{"src":"1.jpg"},{"src":"2.jpg"},{"src":"3.jpg"},{"src":"4.jpg"}]}
  window.onscroll=function(){
    if(checkScrollSlide){
      for(var i=0;i<dataInt.data.length;i++){
        var oparent=document.getElementById("main");
        var box=document.createElement("p");
        box.className="box";
        oparent.appendChild(box);
        var pic=document.createElement("p");
        pic.className="pic";
        box.appendChild(pic);
        var img=document.createElement("img");
        img.src="wallpoll/"+dataInt.data[i].src;
        pic.appendChild(img);
      }
    }
    waterfall('main','box');
  }
}
function waterfall(parent,child){
  var oparent=document.getElementById(parent);
  var boxs=oparent.getElementsByClassName(child);
  var boxw=boxs[0].offsetWidth;
  var cols=Math.floor(document.documentElement.clientWidth/boxw);
  oparent.style.cssText="width:"+cols*boxw+"px;margin:0 auto";
  var harr=new Array();
  for(var i=0;i<boxs.length;i++){
    if(i<cols){
      harr.push(boxs[i].offsetHeight);
     }else{
      var minH=Math.min.apply(null,harr);
      var index=getMinhIndex(harr,minH);
      boxs[i].style.position="absolute";
      boxs[i].style.top=minH+"px";
      boxs[i].style.left=boxs[index].offsetLeft+"px";
      harr[index]+=boxs[i].offsetHeight;
    }
  }
}
function getMinhIndex(arr,val){
  for(var i in arr){
    if(arr[i]===val){
      return i;
    }
  }
}
function checkScrollSlide(){
  var oparent=document.getElementById("main");
  var boxs=oparent.getElementsByClassName("box");
  var lastBox=boxs[boxs.length-1];
  var height=lastBox.offsetTop+Math.floor(lastBox.offsetHeight/2);
  var scrollHeigth=document.documentElement.scrollTop || document.body.scrollTop;
  // console.log(scrollHeigth);
  var seeHeigth=document.documentElement.clientHeigth || document.body.clientHeigth;
  return seeHeigth+scrollHeigth>height?true:false;
}

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