HTML元素居中
⾏内元素⽔平垂直居中 设置⽗级标签。 ⽔平居中： text-align: center 垂直居中： line-height：盒⼦⾼度
⽔平垂直都居中
<!DOCTYPE html>
<html>
<head>
<style>
.container {
position: relative;
width: 200px;
height: 200px;
border: 1px solid black;
}
.child {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 100px;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="child"></div>
</div>
</body>
</html>top: 50%;
left: 50%;
transform: translate(-50%, -50%);
这三个需要一起用实现居中
绝对定位 + 四个方向 margin: auto
<!DOCTYPE html>
<html>
<head>
<style>
.container {
position: relative;
width: 200px;
height: 200px;
border: 1px solid black;
}
.child {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;
width: 100px;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="child"></div>
</div>
</body>
</html>top: 0;
left: 0;
right: 0;
bottom: 0;
margin: auto;这5个需要一起用
flex 布局
<!DOCTYPE html>
<html>
<head>
<style>
.container {
display: flex;
justify-content: center;
align-items: center;
width: 200px;
height: 200px;
border: 1px solid black;
}
.child {
width: 100px;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="child"></div>
</div>
</body>
</html>display: flex;
justify-content: center;
align-items: center;这三个需要一起用
table-cell
<!DOCTYPE html>
<html>
<head>
<style>
.container {
display: table-cell;
text-align: center;
vertical-align: middle;
width: 200px;
height: 200px;
border: 1px solid black;
}
.child {
width: 100px;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="child"></div>
</div>
</body>
</html>display: table-cell;
text-align: center;
vertical-align: middle;这三个需要一起用
原文地址：https://blog.csdn.net/weixin_45596561/article/details/142463839
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