use subscribe to implement PubSub like postbox

[nmocruz]

I was wondering is was a good idea extend the subscribe to subscribe to topics strings like PubSub, and add a publish method that could trigger the callback.

[gnaeus]

knockout-decorators already have same concept — @event decorator. It also uses ko.subscribable() under the hood. The key difference from knockout postbox that events are strongly typed:

class Events {
  @event first: () => void;
  @event second: (word: string, index: number) => void;
}

export default new Events();

import events from "./events";

subscribe(events.first, () => {
  // do something
});

subscribe(events.second, (word, index) => {
  // TypeScript infers that typeof word === "sting"
  // and typeof index === number;
  console.log(word.charAt(index));
})

[nmocruz]

cool :)