Subscription

// Step 1. Import
import Event from "https://deno.land/x/subscription";

// Step 2. Create a new event.
const myEvent = new Event();

// Step 3. Subscribe to the event.
myEvent.subscribe(() => console.log("Hello"));

// Step 4. Dispatch the event.
await myEvent.dispatch();

const listener = myEvent.listener();
for await (const [] of listener)
{
    console.log("Hello");
}
listener.close();

const greeter = new Event<[ name: string ]>();

myEvent.subscribe(name => console.log("Hello %s!", name));

myEvent.dispatch("Sam");
myEvent.dispatch("John");
myEvent.dispatch("Sarah");
myEvent.dispatch("Zoe");

// Hello Sam!
// Hello John!
// Hello Sarah!
// Hello Zoe!