前端学习记录4

2023-10-27 08:09:40

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        #div1{width:300px;heigh:300px;background: red;}
        #div1:hover{background: black}
        #div2{width: 100px;height: 100px;background: green;}
        #div1:hover>#div2{background: blue;}
    </style>
</head>
<body>
<div id="div1">
<div id="div2">
<div id="div3"></div>
</div>
</div>
<span>4必须是1紧邻着的下一个弟弟</span>
<div id="div4"></div>

</body>
</html>

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