CSSPropertyRule

Baseline 2024

Newly available

Since July 2024, this feature works across the latest devices and browser versions. This feature might not work in older devices or 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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