一、前言
不得不说css真强大，总结了几个常用的css特殊效果
二、主要内容
1、几个特殊效果
$green = #02a774;
$yellow = #F5A100;
$bc = #e4e4e4;
// 一像素下边框
bottom-border-1px($color)
position relative
border none
&:after
content ''
position absolute
left 0
bottom 0
width 100%
height 1px
background-color $color
transform scaleY(0.5)
// 一像素上边框
top-border-1px($color)
position relative
&::before
content ''
position absolute
z-index 200
left 0
top 0
width 100%
height 1px
background-color $color
//根据像素比缩放1px 像素边框
@media only screen and (-webkit-device-pixel-ratio: 2 )
.border-1px
&::before
transform scaleY(.5)
@media only screen and (-webkit-device-pixel-ratio: 3 )
.border-1px
&::before
transform scaleY(.333333)
//根据像素比来使用2x 图3x 图
bg-image($url)
background-image: url($url + "@2x.png")
@media (-webkit-min-device-pixel-ratio: 3),(min-device-pixel-ratio: 3)
background-image: url($url + "@3x.png")
//清除浮动
clearFix()
*zoom 1
&::after
content ''
display block
clear both
2、使用2x 3x图做五星
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> .star.star-24 .star-item { width: 10px; height: 10px; margin-right: 3px; background-size: 10px 10px; } .star.star-24 .star-item:last-child { margin-right: 0; } .star.star-24 .star-item.on { background-image: url("../images/stars/star24_on@2x.png"); } @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) { .star.star-24 .star-item.on { background-image: url("../images/stars/star24_on@3x.png"); } } .star.star-24 .star-item.half { background-image: url("../images/stars/star24_half@2x.png"); } @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) { .star.star-24 .star-item.half { background-image: url("../images/stars/star24_half@3x.png"); } } .star.star-24 .star-item.off { background-image: url("../images/stars/star24_off@2x.png"); } @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) { .star.star-24 .star-item.off { background-image: url("../images/stars/star24_off@3x.png"); } } span{ display: inline-block; } </style> </head> <body> <div class="star star-24"> <span class="star-item on"></span> <span class="star-item on"></span> <span class="star-item on"></span> <span class="star-item half"></span> <span class="star-item off"></span> </div> </body> </html>