lovecoding
/
VIP20


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>

        h2{
            background: red;
        }
        #myh2{
            background: green;
        }
        .aa{
            background: pink;
        }
    </style>
</head>
<body>

    <!-- 选择器的优先级 
    style内联样式 > id选择器 > class类选择器 | 伪类 > 标签选择器
    1000         100          10                   1

    id的永远高于class 

    #ul1 .aa{  110

    }
    -->
    <h2 id="myh2" class="aa" >hahahahah</h2>

    
</body>
</html>