代码语言:javascript复制
<!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 type="text/css">
*{
margin: 0;
padding: 0;
}
ul
{
list-style: none;
width: 600px;
height: 600px;
border: 1px solid red;
margin: 100px auto;
display: flex;
flex-direction: column;/*用于修改主轴起点的位置*/
align-items: center;/*告诉浏览器排版好的伸缩项需要和侧轴的center对齐。*/
}
ul>li
{
width: 100px;
height: 100px;
font-size: 30px;
background: red;
line-height: 100px;
text-align: center;
}
ul>li:nth-child(2)
{
background: blue;
}
ul>li:nth-child(3)
{
background: yellow
}
</style>
</head>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
</body>
</html>