js addClass has no effect {code...}

jquery selects elements. If it is a class, add a dot. Preview: https://ityanxi.github.io/seg...

$("footer").addClass("fixed-bottom"); No, it should be $(".footer").addClass("fixed-bottom")

Footer should use the class selector $(".footer") Welcome to my website to learn more JavaScript knowledge: http://www.aizelasi.club/arch...

Solved, thanks JackHuang crp205 Turner It should be $(".footer").addClass("fixed-bottom")

js addClass not working

js addClass has no effect

<html>
  <head>
    <style type="text/css">
      html,body{margin:0;padding: 0;}
      .header{background-color: #ffe4c4;}
      .main{background-color: #bdb76b;}
      .footer{background-color: #ffc0cb;}

      /* 动态为footer添加类fixed-bottom */
      .fixed-bottom {position: fixed;bottom: 0;width:100%;}
    </style>

    <script src="http://libs.baidu.com/jquery/1.7.2/jquery.min.js"></script>
    <script type="text/javascript">
      $(function(){
          function footerPosition(){
              $("footer").removeClass("fixed-bottom");
              var contentHeight = document.body.scrollHeight,//网页正文全文高度
                  winHeight = window.innerHeight;//可视窗口高度，不包括浏览器顶部工具栏
              if(!(contentHeight > winHeight)){
                  //当网页正文高度小于可视窗口高度时，为footer添加类fixed-bottom
                  $("footer").addClass("fixed-bottom");
              } else {
                  $("footer").removeClass("fixed-bottom");
              }
          }
          footerPosition();
          $(window).resize(footerPosition);
      });
    </script>
  </head>


  <body>
    <p class="header">header</p>
    <p class="main">main content</p>
    <p class="footer">footer</p>
  </body>
</html>

给我你的怀抱2727 days ago987

js addClass not working

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