Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The <frequency-percentage> CSS data type represents a value that can be either a <frequency> or a <percentage>. Frequency values, e.g. the pitch of a speaking voice, are not currently used in any CSS properties.
The value of a <frequency-percentage> is either a <frequency> or a <percentage>; see their individual reference pages for details about their syntaxes.
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() expression.
90% Positive percentage +90% Positive percentage with leading + -90% Negative percentage — not valid for all properties that use percentages
90 % No space is allowed between the number and the unit
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
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>.
| Specification |
|---|
| CSS Values and Units Module Level 5 # mixed-percentages |
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
frequency-percentage |
No |
No |
No
See bug 741643.
|
No |
No |
No |
No |
No |
No
See bug 741643.
|
No |
No |
No |