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>Documenttitle>
<style type="text/css">
.box>div{
color: red;
width: 50px;
height: 20px;
border: solid;
}
style>
head>
<body>
<div class="box">
<p>
<div>你好div>
p>
div>
body>
html>
你审查元素 会发现 p 被解析 成两个 p了 。 因为 不建议 使用p元素 包裹div
<!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 type="text/css">
.box>div {
color: red;
width: 50px;
height: 20px;
border: solid;
}
</style>
</head>
<body>
<div class="box">
<div>666</div>
<span>
<div>你好</div>
</span>
</div>
</body>
</html>