Baseline Widely available
The read-only CSSStyleSheet property cssRules returns a live CSSRuleList which provides a real-time, up-to-date list of every CSS rule which comprises the stylesheet. Each item in the list is a CSSRule defining a single rule.
A live-updating CSSRuleList containing each of the CSS rules making up the stylesheet. Each entry in the rule list is a CSSRule object describing one rule making up the stylesheet.
Individual rules within the stylesheet can then be accessed by index:
const ruleList = document.styleSheets[0].cssRules;
for (let i = 0; i < ruleList.length; i++) {
processRule(ruleList[i]);
}
Rules can also be accessed using for...of:
const ruleList = document.styleSheets[0].cssRules;
for (const rule of ruleList) {
processRule(rule);
}
However, because CSSRule is not a proper array, you can't use forEach().
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