flex布局：垂直加水平居中
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| display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
|
div或img图片高度随宽度自适应
http://blog.csdn.net/zh_rey/article/details/69666232
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| .el-carousel__item{
width: 100%;
position:relative;
z-index:2;
display: block;
}
.el-carousel__item img{
position:absolute;
top:0;
bottom:0 ;
left:0 ;
right:0 ;
width:100% ;
margin:auto ;
z-index: 1 ;
*zoom:1 ;
}
.el-carousel__item:before {
content: "";
display: inline-block;
padding-bottom: 100%;
width: 0.1px;
vertical-align: middle;
}
.el-carousel__container{height: 100% !important}
|
scss语法
https://www.sassmeister.com/
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| @mixin center($width,$height)
{
width: $width;
height: $height;
position: absolute;
top: 50%;
left: 50%;
margin-top: -($height) / 2;
margin-left: -($width) / 2;
}
div
{
@include center(100px,80px);
}
p{
@include center(80,40px);
}
%spriteAll
{
bakckground:url(images/sprite.png) no-repeat;
color:blue;
}
.sprite-1
{
@extend %spriteAll;
background-position:0 -30px;
}
.sprite-2
{
@extend %spriteAll;
background-position:0 -60px;
}
$color1:red;
$color2:green;
$color3:blue;
body
{
color:$color1;
.column
{
color:$color2;
.content-title
{
color:$color3;
}
}
}
div
{
width:100px;
height:100px;
font:
{
family:Arial;
size:14px;
weight:bold;
}
}
div
{
width:(100px + 23px);
}
|