CSSCounterStyleRule：additiveSymbols 属性
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2023年9月.
CSSCounterStyleRule 接口的 additiveSymbols 属性用于获取或设置 additive-symbols 描述符的值。如果描述符没有设置值，此属性返回空字符串。
值
一个字符串。
示例
以下示例展示了 @counter-style 样式的规则。在 JavaScript 中，myRules[0] 为 @counter-style 规则，additiveSymbols 返回值为“ V 5, IV 4, I 1”。
css
@counter-style additive-symbols-example {
system: additive;
additive-symbols:
V 5,
IV 4,
I 1;
}
js
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0].additiveSymbols); // " V 5, IV 4, I 1"
规范
| Specification |
|---|
| CSS Counter Styles Level 3 # dom-csscounterstylerule-additivesymbols |