import { type OnBeforeUnloadEventHandlerNonNull } from "https://deno.land/x/windmill@v1.397.0/node_modules/evt/src/lib/types/lib.dom.ts";
Call Signatures
(event: Event): string | null
x/windmill/node_modules/evt/src/lib/types/lib.dom.ts>OnBeforeUnloadEventHandlerNonNull
import { type OnBeforeUnloadEventHandlerNonNull } from "https://deno.land/x/windmill@v1.397.0/node_modules/evt/src/lib/types/lib.dom.ts";