CSSPropertyRule

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The CSSPropertyRule interface of the CSS Properties and Values API represents a single CSS @property rule.

Instance properties

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.

Instance methods

No specific methods; inherits methods from its ancestor CSSRule.

Examples

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.

css

@property --property-name {
  syntax: "<color>";
  inherits: false;
  initial-value: #c0ffee;
}

let myRules = document.styleSheets[0].cssRules;
console.log(myRules[0]); //a CSSPropertyRule

Specifications

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

Browser compatibility

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