lovecoding
/
web0715


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* div{
            color: red;
        } */
        /* 以"."开头的选择器称为类选择器 */
        /* .div1{
            color: red;
        } */
         /* 以#开头的选择器为ID选择器 且是唯一的 */
        #divid{
            color: red;
        }
    </style>
</head>
<body>
    <div class="div1" id="divid">hello</div>
    <div>world</div>
    <div class="div1">你好</div>
    <div style="color:blue">世界</div>
</body>
</html>