CSSCounterStyleRule.prefix

The prefix property of the CSSCounterStyleRule interface gets and sets the value of the prefix descriptor. If the descriptor does not have a value set, this attribute returns an empty string.

Syntax

let prefix = CSSCounterStyleRule.prefix;
CSSCounterStyleRule.prefix = a;

Value

A CSSOMString

Examples

The following example shows a @counter-style rule. In JavaScript, myRules[0] is this @counter-style rule, returning prefix gives us the value "Chapter ".

@counter-style chapters {
  system: numeric;
  symbols: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9";
  prefix: 'Chapter ';
}
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].prefix); // "Chapter "

Specifications

Specification
CSS Counter Styles Level 3 (CSS Counter Styles 3)
# dom-csscounterstylerule-prefix

Browser compatibility

BCD tables only load in the browser