negative
Quick Summary for negative (@counter-style)
negative
descriptor lets you alter the representations of negative counter values, by providing a way to specify symbols to be appended or prepended to the counter representation when the value is negative.
Code Usage for negative (@counter-style)
/* <symbol> values */ negative: "-"; /* Prepends '-' if value is negative */ negative: "(" ")"; /* Surrounds value by '(' and ')' if it is negative */
More Details for negative (@counter-style)
negative
When defining custom counter styles, the negative
descriptor lets you alter the representations of negative counter values, by providing a way to specify symbols to be appended or prepended to the counter representation when the value is negative.
Syntax
/* <symbol> values */ negative: "-"; /* Prepends '-' if value is negative */ negative: "(" ")"; /* Surrounds value by '(' and ')' if it is negative */
Values
first<symbol>
This symbol will be prepended to the representation when the counter is negative.
second<symbol>
If present, this symbol will be appended to the representation when the counter is negative.
Description
If the counter value is negative, the symbol provided as value for the descriptor is prepended to the counter representation; and a second symbol if specified, will be appended to the representation. The negative descriptor has effect only if the system
value is symbolic
, alphabetic
, numeric
, additive
, or extends
, if the extended counter style itself uses a negative sign. If the negative descriptor is specified for other systems that don't support negative counter values, then the descriptor is ignored.
Formal definition
Related at-rule | @counter-style |
---|---|
Initial value | "-" hyphen-minus |
Computed value | as specified |
Formal syntax
<symbol> <symbol>?where
<symbol> = <string> | <image> | <custom-ident>
where
<image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>
where
<image()> = image( <image-tags>? [ <image-src>? , <color>? ]! )<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>? )<cross-fade()> = cross-fade( <cf-mixing-image> , <cf-final-image>? )<gradient> = <linear-gradient()> | <repeating-linear-gradient()> | <radial-gradient()> | <repeating-radial-gradient()> | <conic-gradient()>
where
<image-tags> = ltr | rtl<image-src> = <url> | <string><color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hwb()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color><image-set-option> = [ <image> | <string> ] [ <resolution> || type(<string>) ]<id-selector> = <hash-token><cf-mixing-image> = <percentage>? && <image><cf-final-image> = <image> | <color><linear-gradient()> = linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )<repeating-linear-gradient()> = repeating-linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )<radial-gradient()> = radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )<repeating-radial-gradient()> = repeating-radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )<conic-gradient()> = conic-gradient( [ from <angle> ]? [ at <position> ]?, <angular-color-stop-list> )
where
<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )<hwb()> = hwb( [<hue> | none] [<percentage> | none] [<percentage> | none] [ / [<alpha-value> | none] ]? )<side-or-corner> = [ left | right ] || [ top | bottom ]<color-stop-list> = [ <linear-color-stop> [, <linear-color-hint>]? ]# , <linear-color-stop><ending-shape> = circle | ellipse<size> = closest-side | farthest-side | closest-corner | farthest-corner | <length> | <length-percentage>{2}<position> = [ [ left | center | right ] || [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]? | [ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ] ]<angular-color-stop-list> = [ <angular-color-stop> [, <angular-color-hint>]? ]# , <angular-color-stop>
where
<alpha-value> = <number> | <percentage><hue> = <number> | <angle><linear-color-stop> = <color> <color-stop-length>?<linear-color-hint> = <length-percentage><length-percentage> = <length> | <percentage><angular-color-stop> = <color> && <color-stop-angle>?<angular-color-hint> = <angle-percentage>
where
<color-stop-length> = <length-percentage>{1,2}<color-stop-angle> = <angle-percentage>{1,2}<angle-percentage> = <angle> | <percentage>
Examples
Rendering negative counters
HTML<ol class="list" start="-3"> <li>One</li> <li>Two</li> <li>Three</li> <li>Four</li> <li>Five</li> </ol>
CSS @counter-style neg { system: numeric; symbols: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9"; negative: "(-" ")"; } .list { list-style: neg; }
ResultSpecifications
Specification |
---|
CSS Counter Styles Level 3 # counter-style-system |
See also
list-style
, list-style-image
, list-style-position
symbols()
, the functional notation creating anonymous counter styles.