元のコード:
center.html
:
<!DOCTYPE html>
<html lang="Zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Center</title>
<link rel="stylesheet" href="center.css">
</head>
<body>
<div class="father">
<div class="son"></div>
</div>
</body>
</html>
center.css
:
body {
background-color: #6ed0ff;
}
.father {
background-color: #be33ec;
border-radius: 20px;
box-shadow: 0 0 15px rgb(0, 0, 0);
margin: 100px auto;
width: 300px;
height: 300px;
}
.son {
background-color: #fcff00;
border-radius: 20px;
box-shadow: 0 0 10px rgb(0, 0, 0);
width: 100px;
height: 100px;
}
元の効果:
親ボックスに対する子ボックスの垂直方向のセンタリング効果を実現するには、次の手順に従います。
1.1。 grid
.father {
display: grid;
}
.son {
align-self: center;
justify-self: center;
}
2. absolute
+ネガティブmargin
.father {
position: relative;
}
.son {
position: absolute;
left: 50%;
top: 50%;
margin-left: -50px;
margin-top: -50px;
}
3. absolute
+transform
.father {
position: relative;
}
.son {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
}
4. absolute
+margin: auto
.father {
position: relative;
}
.son {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
margin: auto;
}
5.5。 flex
.father {
display: flex;
justify-content: center;
align-items: center;
}
6. margin
+transfrom
.father {
overflow: hidden;
}
.son {
margin: 50% auto;
transform: translateY(-50%);
}
7。 table-cell
.father {
display: table-cell;
text-align: center;
vertical-align: middle;
}
.son {
display: inline-block;
}
8. inline-block
+vertical-align
.father {
text-align: center;
line-height: 300px;
}
.son {
display: inline-block;
vertical-align: middle;
}