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 pageUIEvent-1UIEvent: {(type, eventInitDict?): UIEvent; prototype: UIEvent;}; Type Declaration Parameters ParameterTypetypestringeventInitDict?UIEventInit Returns UIEvent prototype prototype: UIEvent;