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本文档使用
php.cn手册 发布
文字
语法：
image-set() = image-set( <image-set-option># )
<image-set-option> = [ <image> | <string> ] <resolution>
说明：
image-set() 可以根据用户设备的分辨率匹配合适的图像。
为不同的设备分配合适得图像;
示例
div { background-image: image-set( "test.png" 1x, "test-2x.png" 2x, "test-print.png" 600dpi ); }
上述代码将会为普通屏幕使用 test.png，为高分屏使用 test-2x.png，如果更高的分辨率则使用 test-print.png，比如印刷。
兼容性：
| IE | Firefox | Chrome | Safari | Opera | iOS Safari | Android Browser | Android Chrome |
|---|---|---|---|---|---|---|---|
| 6.0-11.0 | 2.0-38.0 | 4.0-20.0 | 3.1-5.1 | 15.0-28.0-webkit- #1 | 3.2-5.1 | 2.1-4.3 | 18.0-20.0 |
| 21.0-43.0-webkit- #1 | 6.0-8.1-webkit- #1 | 6.0-8.1-webkit- #1 | 4.4-4.4.4-webkit- #1 | 21.0-43.0-webkit- #1 |
需要注意的是，目前这些浏览器支持的语法是：image-set( <url> | <string> )，写法如下：
示例
div { background-image: image-set( url(test.png) 1x, url(test-2x.png) 2x ); }