CSSCounterStyleRule.range

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

A CSSOMString

The following example shows a @counter-style rule. In JavaScript, myRules[0] is this @counter-style rule, returning range gives us the value "2 4, 7 9".

@counter-style range-multi-example {
  system: cyclic;
  symbols: "\25A0" "\25A1";
  range: 2 4, 7 9;
}

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].range); // "2 4, 7 9"