import { addEventListener } from "https://deno.land/x/adka_server@0.1.5/deno.d.ts";
Registers an event listener in the global scope, which will be called
synchronously whenever the event type is dispatched.
addEventListener('unload', () => { console.log('All finished!'); });
...
dispatchEvent(new Event('unload'));
Parameters
callback: EventListenerOrEventListenerObject | null
optional
options: boolean | AddEventListenerOptions | undefined