An object implementing the CSSConditionRule interface represents a single condition CSS at-rule, which consists of a condition and a statement block. It is a child of CSSGroupingRule.

Two objects derive from it : CSSMediaRule and CSSSupportsRule.


The syntax is described using the WebIDL format.

interface CSSConditionRule : CSSGroupingRule {
    attribute DOMString conditionText;


The CSSConditionRule derives from CSSRule, CSSGroupingRule and inherits all properties of these classes. It has one specific property:

Represents the text of the condition of the rule.


The CSSConditionRule derives from CSSRule, CSSGroupingRule and inherits all methods of these classes. It has no specific property of its own.


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

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
CSSConditionRuleChrome Full support 56Edge Full support ≤18Firefox Full support 20IE No support NoOpera Full support 43Safari ? WebView Android Full support 56Chrome Android Full support 56Firefox Android Full support 20Opera Android Full support 43Safari iOS ? Samsung Internet Android Full support 6.0


Full support
Full support
No support
No support
Compatibility unknown
Compatibility unknown

See also