Create a waterfall effect using JavaScript-JS Tutorial-php.cn

Create a waterfall effect using JavaScript

巴扎黑

Release： 2017-08-17 14:04:05

Original

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The example in this article shares the specific code for realizing the waterfall flow effect in js for your reference. The specific content is as follows
Front-end content:
Use Javascript and four p's to put the photo into the four p's

<!DOCTYPE html>
<html>
 <head> 
  <meta charset="UTF-8" /> 
  <title>Title</title> 
  <style>  .container {
   width: 1000px;
   margin: 0 auto;
   background-color: lightgray;  }  
  .item {
   width: 24%;
   margin-right: 10px;   float: left;  }  .item img{
   width: 100%;  }  
 </style>
 </head>
 <body>
  {#将内容放在container中#}
  <p>
   {# 将图片内容放入四个item中，形成四个item#} 
   <p></p> 
   <p></p> 
   <p></p> 
   <p></p> 
  </p>
  <script src="/static/js/jquery-2.1.4.min.js"></script>
  <script>
$(function() {
    {#网页加载时自动执行#
    }
    var obj = new ScrollImg();
    obj.fetchImg();
    obj.scrollEvent();
}) {#定义对象#
}
function ScrollImg() {
    this.nid = 0; {#取照片方法#
    }
    this.fetchImg = function() {
        var that = this $.ajax({
            url: &#39;/get_imgs.html&#39;,
            type: &#39;GET&#39;,
            {#传输数据，已经取了多少照片，后台可以依据，继续取照片#
            }
            data: {
                &#39;nid&#39;: that.nid
            },
            dataType: &#39;JSON&#39;,
            success: function(args) {
                if (args.status) {
                    var img_list = args.data;
                    $.each(img_list,
                    function(index, obj) {
                        var eqv = that.nid % 4;
                        var tag = document.createElement(&#39;img&#39;) tag.src = &#39;/&#39; + obj.img_dir;
                        console.log(eqv) $(&#39;.container&#39;).children().eq(eqv).append(tag) that.nid += 1;
                    })
                }
            }
        })
    } {#监听滚动条，当滚到底部时，自动加载数据#
    }
    this.scrollEvent = function() {
        var that = this;
        $(window).scroll(function() {
            var srollTop = $(window).scrollTop();
            var winHeight = $(window).height();
            var docHeight = $(document).height();
            if (srollTop + winHeight >= docHeight - 2) {
                that.fetchImg();
            }
        })
    }
}
</script>
 </body>
</html>

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Backend content:
Based on Django's FBV, function view, reading data and processing ajax requests
def get_imgs(request):
# Get the photos that have been obtained Number
index = request.GET.get('nid')
#Get the QuerySet collection object and get the 10-digit data after index

imgs_list = models.Student.objects.values(&#39;id&#39;,&#39;img_dir&#39;,&#39;name&#39;)[index:index+10]imgs_list = list(imgs_list)

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#Transfer status and Data content

ret = { &#39;status&#39;:True, &#39;data&#39;:imgs_list}return JsonResponse(ret)

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