CSSStyleRule.styleMap

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styleMap CSSStyleRule StylePropertyMap

StylePropertyMap

styleMap StylePropertyMap.set()

const stylesheet = document.styleSheets[0];

Object.values(stylesheet.cssRules).forEach((block) => {
  if (block.selectorText === "button") {
    block.styleMap.set("--mainColor", "black");
  }
});


CSS Typed OM Level 1 # dom-cssstylerule-stylemap

MDN

MDN 202382

GitHub

CSS (CSSOM)
CSSStyleRule
1. CSSGroupingRule
2. CSSRule
CSSOM
1. CSS
2. CSS
6. CSS value serialization