Web/API/CSSStyleSheet/cssRules

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.

Syntax

var rules = cssStyleSheet.cssRules;

Value

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.

Examples

Individual rules within the stylesheet can then be accessed by index:

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

for (let i=0; i < ruleList.length; i++) {
  processRule(ruleList[i]);
}

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

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

for (let rule of ruleList) {
  processRule(rule);
}

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

Specifications

Specification	Status	Comment
CSS Object Model (CSSOM)The definition of 'CSSStyleSheet.cssRules' in that specification.	Working Draft

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`cssRules`	Chrome Full support Yes	Edge Full support 12	Firefox Full support 1	IE Full support 9	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 4	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support: Full support