footer Locate the bottom of the page (code sharing)

2021-07-26 06:52:43
OfStack
Without saying much, please look at the code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>footer Positioning </title>
<style>
  *{
    margin:0;
    padding: 0;
  }
  .box{
    width: 100%;
    height:300px;
    background: pink;
    margin-bottom: 30px;
  }
  .footer{
    background: red;
    width: 100%;
    height:30px;
  }
</style>
</head>
<body>
<div class="main">
<!-- Head start -->
  <div class="box">
  </div>
</div>
<!-- Bottom -->
<div class="footer">
</div>
<script type="text/javascript" src='http://libs.baidu.com/jquery/2.0.0/jquery.js'></script>
</body>
</html>
<script>
$(document).ready(function () {
  var theWindow = $(window);
  function resized() {
    var windowSize=window.devicePixelRatio;
  if(windowSize==1){ 
    var hg2 = $(window).height();
    var main = $('.main').outerHeight();
    var hg4 = $('.footer').outerHeight();
    var hg=hg2-hg4
      if( hg > main){
        $('.footer').css({"position":'fixed','bottom':0,'left':0,"z-index":999,"width":"100%"});
      }else{
        $('.footer').css({"position":'static'});
      }
  }else{
    $('.footer').css({"position":'static'});
  }
  }
  theWindow.resize(function () {
    resized();
  }).trigger('resize');
});
</script>