lovecoding
/
VIP20


			
				
					
						
						
							1234567891011121314151617181920212223242526272829303132
							<!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>
        div{
            background: red;
        }
        /* 伪元素 after在div内容的后边添加一个伪元素 行元素 */
        div::after{
            content:"呵呵";
            background: green;
            
        }
        div::before{
            content:'嘻嘻'
        }
    </style>
</head>
<body>
    <div>

        哈哈哈哈哈哈
        <!-- 添加一个元素 -->
        <!-- <span>我是元素</span> -->
    </div>

</body>
</html>