When defining custom counter styles, the range
descriptor lets the author specify a range of counter values over which the style is applied. If a counter value is outside the specified range, then the fallback style will be used to construct the representation of that marker.
Syntax
/* Keyword value */ range: auto; /* Range values */ range: 2 5; range: infinite 10; range: 6 infinite; range: infinite infinite; /* Multiple range values */ range: 2 5, 8 10; range: infinite 6, 10 infinite;
Values
auto
- The range depends on the counter system:
- For cyclic, numeric, and fixed systems, the range is negative infinity to positive infinity.
- For alphabetic and symbolic systems, the range is 1 to positive infinity.
- For additive systems, the range is 0 to positive infinity.
- For extends systems, the range is whatever auto would produce for the extended system; if extending a complex predefined style (§7 Complex Predefined Counter Styles), the range is the style’s defined range.
[ [ | infinite ]{2} ]#
- Defines a comma-separated list of ranges. For each individual range, the first value is the lower bound and the second value is the upper bound. A range is inclusive, that means it always contains both, the lower and upper bound numbers. If infinite is used as the first value in a range, it represents negative infinity; if it is used as the second value, it represents positive infinity. The range of the counter style is the union of all the ranges defined in the list. If the lower bound of any range is higher than the upper bound, the entire descriptor is invalid and will be ignored.
Description
The value of the range descriptor can be either auto or a comma separated list of lower and upper bounds specified as integers.
If value is auto, then for cyclic, numeric, and fixed system, the range will be from negative infinity to positive infinity. For alphabetic and symbolic systems, range will be from 1 to positive infinity. For additive systems, auto will result in the range 0 to positive infinity. For extends systems, the range is whatever auto will produce for the extended system.
When range is specified as integers, the value infinite
can be used to denote infinity. If infinite is specified as the first value in a range, then it is interpreted as negative infinity. If used as upper bound, it is taken as positive infinity.
Formal definition
Related at-rule | @counter-style
|
Initial value | auto
|
Computed value | as specified |
Formal syntax
[ [ <integer> | infinite ]{2} ]# | auto
Examples
Setting counter style over a range
<ul class="list">
<li>One</li>
<li>Two</li>
<li>Three</li>
<li>Four</li>
<li>Five</li>
<li>Six</li>
<li>Seven</li>
<li>Eight</li>
<li>Nine</li>
<li>Ten</li>
</ul>
@counter-style range-multi-example {
system: cyclic;
symbols: "\25A0" "\25A1";
range: 2 4, 7 9;
}
.list {
list-style: range-multi-example;
}
The above list will display as follows:
1. One □. Two ■. Three □. Four 5. Five 6. Six ■. Seven □. Eight ■. Nine 10. Ten
Specifications
Specification | Status | Comment |
---|---|---|
CSS Counter Styles Level 3The definition of 'range' in that specification. | Candidate Recommendation | Initial definition |
Browser compatibility
The compatibility table in 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
range
|
Chrome
No support No |
Edge
No support No |
Firefox
Full support 33 |
IE
No support No |
Opera
No support No |
Safari
No support No |
WebView Android
No support No |
Chrome Android
No support No |
Firefox Android
Full support 33 |
Opera Android
No support No |
Safari iOS
No support No |
Samsung Internet Android
No support No |
Legend
- Full support
- Full support
- No support
- No support
See also
list-style
,list-style-image
,list-style-position
symbols()
, the functional notation creating anonymous counter styles.
range by Mozilla Contributors is licensed under CC-BY-SA 2.5.