// https://drafts.csswg.org/css-animations-1/#interface-csskeyframesrule
[Exposed=Window]
interface CSSKeyframesRule : CSSRule {
    attribute CSSOMString name;
    readonly attribute CSSRuleList cssRules;
    readonly attribute unsigned long length;

    getter CSSKeyframeRule (unsigned long index);
    [FIXME] undefined appendRule(CSSOMString rule);
    [FIXME] undefined deleteRule(CSSOMString select);
    [FIXME] CSSKeyframeRule? findRule(CSSOMString select);
};
