import { type OnBeforeUnloadEventHandler } from "https://deno.land/x/evt@v2.5.3/lib/types/lib.dom.ts";
definition: OnBeforeUnloadEventHandlerNonNull | null
import { type OnBeforeUnloadEventHandler } from "https://deno.land/x/evt@v2.5.3/lib/types/lib.dom.ts";