/Web APIs

CSSStyleSheet: cssRules property

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++) {

Rules can also be accessed using for...of:

const ruleList = document.styleSheets[0].cssRules;

for (const rule of ruleList) {

However, because CSSRule is not a proper array, you can't use forEach().


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
cssRules 1 12 1 9 ≤12.1 1 4.4 18 4 ≤12.1 1 1.0

See also

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