CSSStyleRule

Inherits properties from its ancestors CSSGroupingRule and CSSRule.

CSSStyleRule.selectorText

Returns the textual representation of the selector for this rule, e.g. "h1, h2".

CSSStyleRule.style Read only

Returns the CSSStyleDeclaration object for the rule.

CSSStyleRule.styleMap Read only

Returns a StylePropertyMap object which provides access to the rule's property-value pairs.

Inherits methods from its ancestors CSSGroupingRule and CSSRule.

The CSS includes one style rule. This will be the first CSSRule returned by document.styleSheets[0].cssRules. myRules[0] therefore returns a CSSStyleRule object representing the rule defined for h1.

h1 {
  color: pink;
}

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); // a CSSStyleRule representing the h1.