The CSSPropertyRule interface of the CSS_Properties_and_Values_API represents a single CSS @property rule.


Inherits properties from its ancestor CSSRule.

CSSPropertyRule.inherits Read only
Returns the inherit flag of the custom property.
CSSPropertyRule.initialvalue Read only
Returns the initial value of the custom property.
CSSPropertyRule.name Read only
Returns the name of the custom property.
CSSPropertyRule.syntax Read only
Returns the literal syntax of the custom property.


No specific methods; inherits methods from its ancestor CSSRule.


This stylesheet contains a single @property rule. The first CSSRule returned will be a CSSPropertyRule with the properties and values as defined by the rule in CSS.

@property --property-name {
  syntax: '<color>';
  inherits: false;
  initial-value: #c0ffee;
let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); //a CSSPropertyRule


CSS Properties and Values API Level 1 (CSS Properties and Values API 1)
# the-css-property-rule-interface

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