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 pageCSSUnitValue-1CSSUnitValue: {(value, unit): CSSUnitValue; prototype: CSSUnitValue;}; Type Declaration Parameters ParameterTypevaluenumberunitstring Returns CSSUnitValue prototype prototype: CSSUnitValue;