用 CSS 将一个容器居中
欢迎访问新站点: https://www.yidiankuaile.com/post/css-center
- position + margin
- display:table-cell
- position+transform
- flex;align-items:center;justtify-contennt:center
- display:flex;margin:auto
- 纯position
- 兼容低版本浏览器，不固定宽高
1.position + margin
1
2
3
4
|
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
.wrap {
width: 200px;
height: 200px;
background: yellow;
position: relative;
}
.wrap .center {
width: 100px;
height: 100px;
background: green;
margin: auto;
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
}
|
兼容性：主流浏览器均支持，IE6不支持
2.display:table-cell
1
2
3
4
|
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
.wrap{
width: 200px;
height: 200px;
background: yellow;
display: table-cell;
vertical-align: middle;
text-align: center;
}
.center{
display: inline-block;
vertical-align: middle;
width: 100px;
height: 100px;
background: green;
}
|
3.position + transform
1
2
3
4
|
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
.wrap {
position: relative;
background: yellow;
width: 200px;
height: 200px;
}
.center {
position: absolute;
background: green;
top:50%;
left:50%;
-webkit-transform:translate(-50%,-50%);
transform:translate(-50%,-50%);
width: 100px;
height: 100px;
}
|
兼容性：ie9以下不支持 transform，手机端表现的比较好。
4.flex;align-items: center;justify-content: center
1
2
3
4
|
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
| /* css */
.wrap {
background: yellow;
width: 200px;
height: 200px;
display: flex;
align-items: center;
justify-content: center;
}
.center {
background: green;
width: 100px;
height: 100px;
}
|
移动端首选
5.display:flex;margin:auto
1
2
3
4
| <!-- html -->
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
| /* css */
.wrap {
background: yellow;
width: 200px;
height: 200px;
display: flex;
}
.center {
background: green;
width: 100px;
height: 100px;
margin: auto;
}
|
移动端首选
6.纯position
1
2
3
4
| <!-- html -->
<div class="wrap">
<div class="center"></div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
| /* css */
.wrap {
background: yellow;
width: 200px;
height: 200px;
position: relative;
}
/**方法一**/
.center {
background: green;
position: absolute;
width: 100px;
height: 100px;
left: 50px;
top: 50px;
}
/**方法二**/
.center {
background: green;
position: absolute;
width: 100px;
height: 100px;
left: 50%;
top: 50%;
margin-left:-50px;
margin-top:-50px;
}
|
兼容性：适用于所有浏览器
方法一计算公式如下：
子元素（conter）的left值计算公式：left=(父元素的宽 - 子元素的宽 ) / 2=(200-100) / 2=50px;
子元素（conter）的top值计算公式：top=(父元素的高 - 子元素的高 ) / 2=(200-100) / 2=50px;
方法二计算公式：
left值固定为50%;
子元素的margin-left= -（子元素的宽/2）=-100/2= -50px;
top值也一样，固定为50%
子元素的margin-top= -（子元素的高/2）=-100/2= -50px;
7.兼容低版本浏览器，不固定宽高
1
2
3
4
5
6
|
<div class="table">
<div class="tableCell">
<div class="content">不固定宽高，自适应</div>
</div>
</div>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
.table {
height: 200px;
width: 200px;
display: table;
position: relative;
float:left;
background: yellow;
}
.tableCell {
display: table-cell;
vertical-align: middle;
text-align: center;
*position: absolute;
padding: 10px;
*top: 50%;
*left: 50%;
}
.content {
*position:relative;
*top: -50%;
*left: -50%;
background: green;
}
|
发表于
，并被添加「
css 」标签，最后修改于
本文链接：https://lidong.me/blog/css-center/