基于JavaScript实现瀑布流布局

本文实例为大家分享了js实现瀑布流布局的具体代码，供大家参考，具体内容如下

1、html+css+js代码：

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<script type="text/javascript">
window.onload = function(){

waterfall("main","pin");

var dataint = {'data':[{'src':'1.jpg'},{'src':'2.jpg'},{'src':'3.jpg'},{'src':'4.jpg'}]};

window.onscroll = function(){
  if (checkscrollside()) {
    var oparent = document.getElementById('main');
    for (var i = 0; i < dataint.data.length; i++) {
      var opin = document.createElement('div');
      opin.className = 'pin';
      oparent.appendChild(opin);
      var o<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a> = document.createElement('div');
      o<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.className = '<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>';
      opin.appendChild(o<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>);
      var oimg = document.createElement('img');
      oimg.src = './images/' +dataint.data[i].src;
      o<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>.appendChild(oimg);
    }
    waterfall('main','pin');
  };
}

}

//parent为父元素的id，pin为子元素id
function waterfall(parent,pin){
var oparent = document.getElementById(parent);
var apin = getclassobj(oparent,pin);//获取id为oparent的类名为pin的元素
var ipinw = apin[0].offsetWidth;
var num = Math.floor(document.documentElement.clientWidth/ipinw);
oparent.style.csstext = 'width:' + ipinw*num + 'px;margin:0 auto;';

var pinharr = [];
for( var i = 0;i < apin.length; i++)
{
  var pinh = apin[i].offsetHeight;
  if (i < num) {
    pinharr[i] = pinh;
  }
  else{
    var minh = Math.min.apply(null,pinharr);
    var minhindex = getminhindex(pinharr,minh);
    apin[i].style.position = 'absolute';
    apin[i].style.top = minh +'px';
    apin[i].style.left = apin[minhindex].offsetLeft + 'px';
    pinharr[minhindex] += apin[i].offsetHeight; 
  }

}

}

//获取id为parent的类名为classname的元素
function getclassobj(parent,classname){

var obj = parent.getElementsByTagName('*');
var pins = [];
for (var i = 0; i < obj.length; i++) {
  if (obj[i].className == classname) {
    pins.push(obj[i]);
  }
};
return pins;

}

function getminhindex(arr,minh){
for(var i in arr){
if (arr[i] == minh) {
return i;
}
}
}

function checkscrollside(){
var oparent = document.getElementById('main');
var apin = getclassobj(oparent,'pin');
var lastpinh = apin[apin.length - 1].offsetTop + Math.floor(apin[apin.length - 1].offsetHeight/2);
var scrollTop = document.documentElement.scrollTop||document.body.scrollTop;
var documenth = document.documentElement.clientHeight;
return(lastpinh<scrollTop + documenth)?true:false;
}

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<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/16.jpg"&gt;
  </div>
</div>
<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/17.jpg"&gt;
  </div>
</div>
<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/18.jpg"&gt;
  </div>
</div>
<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/19.jpg"&gt;
  </div>
</div>

<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/20.jpg"&gt;
  </div>
</div>
<div class="pin"&gt;
  <div class="<a href="https://www.jb51.cc/tag/Box/" target="_blank" class="keywords">Box</a>"&gt;
    <img src="images/21.jpg"&gt;
  </div>
</div>