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CSSCounterStyleRule: prefix property

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.

Value

A string

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 ".

css

@counter-style chapters {
  system: numeric;
  symbols: "0" "1" "2" "3" "4" "5" "6" "7" "8" "9";
  prefix: "Chapter ";
}

js

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].prefix); // "Chapter "

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
prefix 91 91 33 No 77 17 91 91 33 64 17 16.0

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https://developer.mozilla.org/en-US/docs/Web/API/CSSCounterStyleRule/prefix