类选择器 | Class selectors
Class selectors
CSS 类选择器根据其class属性的内容匹配元素。
/* All elements with class="spacious" */
.spacious {
margin: 2em;
}
/* All <li> elements with class="spacious" */
li.spacious {
margin: 2em;
}
语法
.class_name { style properties }
请注意，这相当于以下内容attribute selector：
[class~=class_name] { style properties }
实例
CSS
div.classy {
background-color: skyblue;
}
HTML
<div class="classy">This div has a special class on it!</div>
<div>This is just a regular div.</div>
结果
规范
| Specification | Status | Comment |
|---|---|---|
| Selectors Level 4The definition of 'class selectors' in that specification. | Working Draft | No changes |
| Selectors Level 3The definition of 'class selectors' in that specification. | Recommendation | |
| CSS Level 2 (Revision 1)The definition of 'child selectors' in that specification. | Recommendation | |
| CSS Level 1The definition of 'child selectors' 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) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | ? | ? | (Yes) | ? | ? | ? | ? |
