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• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

<frequency-percentage> CSS data type represents a value that can be either a <frequency> 或 <percentage> . Frequency values, e.g. the pitch of a speaking voice, are not currently used in any CSS properties.

句法

The value of a <frequency-percentage> is either a <frequency> 或 <percentage> ; see their individual reference pages for details about their syntaxes.

描述

Use in calc()

Where a <frequency-percentage> is specified as an allowable type, this means that the percentage resolves to a frequency and therefore can be used in a calc() 表达式。

范例

Valid percentage values

90% Positive percentage
+90% Positive percentage with leading +
-90% Negative percentage — not valid for all properties that use percentages
					

Invalid percentage values

90 % No space is allowed between the number and the unit
					

Valid frequency values

12Hz     Positive integer
4.3Hz    Non-integer
14KhZ    The unit is case-insensitive, though non-SI capitalization is not recommended.
+0Hz     Zero, with a leading + and a unit
-0kHz    Zero, with a leading - and a unit
					

Invalid frequency values

12.0     This is a <number>, not an <frequency>, because it is missing a unit.
7 Hz     No space is allowed between the number and the unit.
0        Although unitless zero is an allowable <length>, it's an invalid <frequency>.
					

规范

规范	状态	注释
CSS Values and Units Module Level 4 The definition of '<frequency-percentage>' in that specification.	编者草案
CSS Values and Units Module Level 3 The definition of '<frequency-percentage>' in that specification.	候选推荐	定义 <frequency-percentage> . Adds calc()

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. 更新 GitHub 上的兼容性数据

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
<frequency-percentage>	Chrome 不支持 No	Edge 不支持 No	Firefox 不支持 No	IE 不支持 No	Opera 不支持 No	Safari 不支持 No	WebView Android 不支持 No	Chrome Android 不支持 No	Firefox Android 不支持 No	Opera Android 不支持 No	Safari iOS 不支持 No	Samsung Internet Android 不支持 No

图例

不支持

不支持

另请参阅

• CSS data types
• CSS Values and Units
• Related CSS data types:
  • <frequency>
  • <percentage>

元数据

• 最后修改： Sep 29, 2020

相关话题

1. CSS
2. CSS 参考
3. CSS Types
4. 特性

   1. <angle-percentage>
   2. <angle>
   3. <basic-shape>
   4. <blend-mode>
   5. <custom-ident>
   6. <dimension>
   7. <frequency-percentage>
   8. <frequency>
   9. <gradient>
   10. <image>
   11. <integer>
   12. <length-percentage>
   13. <length>
   14. <number>
   15. <percentage>
   16. <ratio>
   17. <resolution>
   18. <shape>
   19. <string>
   20. <time-percentage>
   21. <time>
   22. <transform-function>
   23. <url>
   24. color
   25. flex
   26. ident
   27. position