目录
1. flex弹性盒子
<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>
.father {
display: flex;
justify-content: center;
align-items: center;
width: 500px;
height: 500px;
border: 1px solid #ccc;
}
.son {
width: 100px;
height: 100px;
background-color: pink;
}
</style>
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
</body>2. 利用 相对定位 + translate
<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>
.box {
position: absolute;
top: 50%;
left: 50%;
width: 100px;
height: 100px;
background-color: pink;
transform: translate(-50%, -50%);
}
</style>
</head>
<body>
<div class="box"></div>
</body>3. 利用绝对定位 + margin: auto;
<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>
.box {
position: fixed;
left: 0;
right: 0;
top: 0;
bottom: 0;
margin: auto;
width: 100px;
height: 100px;
background-color: pink;
}
</style>
</head>
<body>
<div class="box"></div>
</body>4. 父标签添加弹性盒子，子标签外边距设为auto
<!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>
* {
padding: 0;
margin: 0;
}
body,
html {
width: 100%;
height: 100%;
}
.bigBox {
display: flex;
width: 100%;
height: 100%;
}
.smallBox {
width: 300px;
height: 300px;
background-color: pink;
margin: auto;
}
</style>
</head>
<body>
<div class="bigBox">
<div class="smallBox">上下左右居中</div>
</div>
</body>
</html>原文链接：https://blog.csdn.net/qq_52845451/article/details/126574126
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