Copy pageCopy pageCopy this page as Markdown for LLMsView as MarkdownView this page as plain textOpen in ClaudeAsk questions about this pageOpen in ChatGPTAsk questions about this pageOn this pageCSSRuleList-1CSSRuleList: {(): CSSRuleList; prototype: CSSRuleList;}; Type Declaration Returns CSSRuleList prototype prototype: CSSRuleList;