<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
.father {
300px;
height: 300px;
display: flex;
}
.child {
margin: auto;
}
.father1 {
300px;
height: 300px;
position: relative;
}
.child1 {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
.father2 {
300px;
height: 300px;
display: flex;
justify-content: center;
align-items: center;
}
.child2 {}
</style>
<body>
<!-- flexbox布局 -->
<div class="father">
<div class="child">
qweeeeeeeeeee
</div>
</div>
<!-- 子绝父相 -->
<div class="father1">
<div class="child1">
qweeeeeeeeeee
</div>
</div>
<!-- flex布局 -->
<div class="father2">
<div class="child2">
qweeeeeeeeeee
</div>
</div>
</body>
</html>