CSSCounterStyleRule: fallback property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2023.
The fallback property of the CSSCounterStyleRule interface gets and sets the value of the fallback 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 fallback gives us the value "disc".
css
@counter-style box-corner {
system: fixed;
symbols: ◰ ◳ ◲ ◱;
suffix: ": ";
fallback: disc;
}
js
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].fallback); // "disc"
Specifications
| Specification |
|---|
| CSS Counter Styles Level 3 # dom-csscounterstylerule-fallback |