<dimension> CSS 数据类型是一个带有单位的<number>，例如：10px
CSS使用度量值来描述距离 (<length>)，时间(<time>)，频率(<frequency>)，分辨率(<resolution>)以及其他量。
格式
<dimension> 的格式是一个<number>后紧随一个是标记符的单位，单位大小写不敏感。
Examples
合法的度量值
12px 12像素 1rem 1 rem 1.2pt 1.2点 2200ms 2200毫秒 200hz 200赫兹 200Hz 200赫兹(单位大小写不敏感)
非法的度量值
12 px 单位必须紧随数字，不能有空格 12"px" 单位是标识符，不能加引号
规范
| Specification | 状态 | 说明 |
|---|---|---|
| CSS Values and Units Module Level 4 <dimension> |
Editor's Draft | 添加 cap, ic, lh, rlh, vi, vb |
| CSS Values and Units Module Level 3 <dimension> |
Candidate Recommendation | 添加 ch, rem, vw, vw, vmin, vmax, Q |
| CSS Level 2 (Revision 1) <dimension> |
Recommendation | Defined under Numbers and Length |
| CSS Level 1 <dimension> |
Recommendation | Initial definition under "length units" |
浏览器兼容性
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <dimension> | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 5 | Opera Full support 3.5 | Safari Full support 1 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support