jquery判断某个div是否进入可视区域

发布时间：2015-10-14, 16:03:36 分类：HTML | 编辑 off 网址 | 辅助

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根据div的top和滚动条top判断，参照lazyload做了个demo如下
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script language="javascript" src="/js/jquery-1.4.4.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
<!--//
$(document).ready(function(){
 $(window).bind("scroll", function(event){
  $("div").each(function(){
   var fold = $(window).height() + $(window).scrollTop();
   if( fold <= $(this).offset().top){
    $(this).trigger("appear");
   }
  });
 });
 
 $("div").each(function(){
  if( $(window).height() > $(this).offset().top){
   $(this).html("出现在可视区域");
  }
  $(this).one("appear",function(){
   $(this).html("出现在可视区域");
  });
 });
});
//-->
</script>
</head>

<body>
<div>111</div>
<div>1111</div>
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<div showed = "N">111111111111</div>
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<div showed = "N">111111111111</div>
</body>
</html>

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我把jquery.lazyload.js给改了，做成了一个我要的效果的

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jquery判断某个div是否进入可视区域

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