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CSSSupportsRule

The CSSSupportsRule interface describes an object representing a single CSS @supports at-rule. It implements the CSSConditionRule interface, and therefore the CSSRule and CSSGroupingRule interfaces with a type value of 12 (CSSRule.SUPPORTS_RULE).

Syntax

The syntax is described using the WebIDL format.

interface CSSSupportsRule : CSSConditionRule {
}

Properties

As a CSSConditionRule and therefore a CSSRule and a CSSGroupingRule, CSSSupportsRule also implements the properties of these interfaces. It has no specific properties.

Methods

As a CSSConditionRule and therefore a CSSRuleand a CSSGroupingRule, CSSSupportsRule also implements the methods of that interface. It has no specific methods.

Specification

Specification	Status	Comment
CSS Conditional Rules Module Level 3 The definition of 'CSSSupportsRule' in that specification.	Candidate Recommendation	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	No	Yes	17 Disabled 17 Disabled From Firefox 17 to 19, methods and properties were defined on `CSSSupportsRule`. From version 20, they were on `CSSConditionRule`. Disabled From version 17: this feature is behind the `layout.css.supports-rule.enable` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	12.1	No