Collection
Collection
常用居中类：flex-container-center
效果图——
代码：
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>居中</title>
</head>
<body>
<style>
.flex-container-center {
display: flex;
display: -webkit-flex;
width: 80%;
height: 300px;
border: 1px solid cadetblue;
}
.flex-container-center div {
width: 50%;
height: 100px;
border: 1px solid cornflowerblue;
margin: auto;
}
</style>
<h5>项目在容器内绝对居中</h5>
<div class="flex-container-center">
<div>
这是容器内的项目
</div>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例