07jquery的attr，hasClass,removeCla

作者: An的杂货铺 | 来源:发表于2019-03-11 15:10 被阅读0次

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .active {
            width: 200px;
            height: 200px;
            background-color: red;
        }
    </style>
</head>
<body>
    <button>切换样式</button>
    <div id="demo" class="one"></div>
    <script src="./jquery-1.12.1.min.js"></script>
    <script>
       console.log($('#demo').attr('id'));
       $('#demo').addClass('active');
       $('button').on('click',function(){
        if($('div').hasClass('active')){
           $('div').removeClass('active');
        }else{
          $('div').addClass('active')
        }
          //$('div').toggleClass('active'); 或者直接使用toggleClass
       })

    </script>
</body>
</html>