javascript瀑布流

Posted 2020-10-06 王超元
tags:
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<!DOCTYPE html>
<html>
    <head>
    <meta charset="utf-8">
    <title>哇，瀑布流啊</title>
    <style type="text/css">
    
       @media screen and (min-width:1550px){
            .waterfall-container {    
                 width:1400px;            
            }
        }
        
        @media screen and (max-width:1549px) and (min-width:1366px){
            .waterfall-container {
                 width:1200px;            
            }
        }
        @media screen and (max-width:1365px) and (min-width:700px) {
            .waterfall-container {
                 width:500px;            
            }
        }
        
        @media screen and (max-width:699px) {
            .waterfall-container {
                 width:350px;            
            }
        }
        
        .waterfall-container{                 
            top: 0;
            float:left;            
            display:inline;
            position:relative;
        }
        
        .water-molecule {
             position:absolute;
             border: solid 1px #ccc;
             padding: 10px;
             width: 200px;
             top: 0px;
             left: 0px;
             -webkit-transition: all .7s ease-out .1s;
             -moz-transition: all .7s ease-out .1s;
             -o-transition: all .7s ease-out .1s;
             transition: all .7s ease-out .1s
        }
        img { width: 100%; }
    
        
    </style>
    </head>
    <body >
        <div>
            哟，好拽的瀑布流！！！
        </div>
        <div style="position:relative">
            <div style="left:0; float:left; display:inline; width:100px">
            
                <ul id="mediaSet">
                    <li><a href="#">1300px</a></li>
                    <li><a href="#">1100px</a></li>
                    <li><a href="#">900px</a></li>
                    <li><a href="#">600px</a></li>
                </ul>
            
            </div>
            <div class="waterfall-container">
                  <div class="water-molecule"><a href="images/temp_img02.jpg"><img src="images/temp_img02.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img03.jpg"><img src="images/temp_img03.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img04.jpg"><img src="images/temp_img04.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img09.jpg"><img src="images/temp_img09.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img05.jpg"><img src="images/temp_img05.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img06.jpg"><img src="images/temp_img06.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img07.jpg"><img src="images/temp_img07.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img08.jpg"><img src="images/temp_img08.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img09.jpg"><img src="images/temp_img09.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img10.jpg"><img src="images/temp_img10.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img11.jpg"><img src="images/temp_img11.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img12.jpg"><img src="images/temp_img12.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img13.jpg"><img src="images/temp_img13.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img14.jpg"><img src="images/temp_img14.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img15.jpg"><img src="images/temp_img15.jpg"/></a> </div>
                  <div class="water-molecule"><a href="images/temp_img15.jpg"><img src="images/temp_img15.jpg"/></a> </div>
                  
            </div>
        </div>

    <script type="text/javascript">
    
        function minColunmnIndex (arr) {
            var minColumn = 0;
            var min = arr[minColumn];
            for (var i = 1,len=arr.length; i < len; i++) {
                var temp = arr[i];
                if (temp < min) {
                    minColumn = i;
                    min = temp;
                };
            };
            return minColumn;
        }
        
        Object.extend = function(destination, source) {
            for (var property in source) {
                destination[property] = source[property];
            }
            return destination;
        }
    
        function waterWall(container,settings){    
        
            var _settings = {
                margin:10,
                cellClass:"water-molecule"            
            };
            if(typeof settings != "undefined"){
                _settings = Object.extend(_settings,settings);
            }
            var margin = _settings.margin;
            var boxes = document.getElementsByClassName(_settings.cellClass);
            var wContainer = container;
            var boxWidth = boxes[0].offsetWidth + margin;
            
            function waterfall () {
                var columnHeight=[];
                var waterFallWith = container.offsetWidth;
                var n = parseInt(waterFallWith/boxWidth);
                var columnNum = n == 0 ? 1 : n;
                var baseLeft = wContainer.offsetLeft;
                for (var i = 0,l=boxes.length; i <l ; i++) {
                    if (i<columnNum) {
                        columnHeight[i]=boxes[i].offsetHeight+margin;
                        boxes[i].style.top = 0;
                        boxes[i].style.left =  i*boxWidth+margin+‘px‘;
                    } else{
                        var innsertColumn = minColunmnIndex(columnHeight),
                            imgHeight = boxes[i].offsetHeight+ margin;
                        boxes[i].style.top = columnHeight[innsertColumn]+‘px‘;
                        boxes[i].style.left = innsertColumn*boxWidth+margin+‘px‘;
                        columnHeight[innsertColumn] +=imgHeight; 
                    };

                };
            };                
            
            var wf = {
                master: container,
                waterfall:waterfall
            }
            
            return wf;
        }
        var wf = new waterWall(document.getElementsByClassName("waterfall-container").item(0));
        window.onload = function(){wf.waterfall();};
        window.onresize = function(){
            wf.master.style.width = null;
            wf.waterfall();
        };
    
        
        document.getElementById("mediaSet").addEventListener("click",function(ev){
            var link  = ev.target,
            width = link.text;
            wf.master.style.width = width;
            wf.waterfall();
            
        },false);
        
    </script>
</body>
</html>
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