CSS参考手册
选择 | Selectors
通用选择器 | Universal selectors
CSS 通用选择器(*
)匹配任何类型的元素。
* {
color: green;
}
从CSS3开始,星号可以与namespaces
结合使用:
-
ns|*
- 匹配命名空间ns中的所有元素
-
*|*
- 匹配所有元素
-
|*
-匹配所有没有声明命名空间的元素
语法
* { style properties }
星号对于简单的选择器是可选的。例如,*.warning
和.warning
是等价的。
实例
* [lang^=en] {
color: green;
}
*.warning {
color: red;
}
*#maincontent {
border: 1px solid blue;
}
.floating {
float: left
}
/* automatically clear the next sibling after a floating element */
.floating + * {
clear: left;
}
<p class="warning">
<span lang="en-us">A green span</span> in a red paragraph.</span>
</p>
<p id="maincontent" lang="en-gb">
<span class="warning">A red span</span> in a green paragraph.</span>
</p>
规范
Specification |
Status |
Comment |
---|---|---|
Selectors Level 4The definition of 'universal selector' in that specification. |
Working Draft |
No changes |
Selectors Level 3The definition of 'universal selector' in that specification. |
Recommendation |
Defines behavior regarding namespaces and adds hint that omitting the selector is allowed within pseudo-elements |
CSS Level 2 (Revision 1)The definition of 'universal selector' in that specification. |
Recommendation |
Initial definition |
浏览器兼容性
Feature |
Chrome |
Edge |
Firefox (Gecko) |
Internet Explorer |
Opera |
Safari |
---|---|---|---|---|---|---|
Basic support |
(Yes) |
(Yes) |
1.0 (1.7 or earlier) |
7 |
(Yes) |
(Yes) |
Combination with namespace support |
(Yes) |
(Yes) |
1.0 (1.7 or earlier) |
9 |
8 |
1.3 |
Feature |
Android |
Chrome for Android |
Edge |
Firefox Mobile (Gecko) |
IE Mobile |
Opera Mobile |
Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support |
? |
? |
(Yes) |
1.0 (1) |
? |
? |
? |
Combination with namespace support |
? |
? |
(Yes) |
? |
? |
? |
? |
选择 | Selectors相关
层叠样式表( Cascading Style Sheets )是一种用来表现 HTML 或 XML 等文件样式的计算机语言。CSS 不仅可以静态地修饰网页,还可以配合各种脚本语言动态地对网页各元素进行格式化。