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
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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