Event List

When working with a long list of events, you may decide to access them by name. Modern TypeScript lets you do this, while still controlling the event type, with the help of keyof, as shown in the example below.

class Events {
    first = new SubEvent<number>();
    second = new SubEvent<string>();
    third = new SubEvent<boolean>();

    get<K extends keyof Events>(key: K) {
        return this[key];
    }
}

Then after creating the class:

const events = new Events();

you can access each event via a string, with strongly-typed subscription:

events.get('first').subscribe((data: number) => {

});

events.get('second').subscribe((data: string) => {

});

events.get('third').subscribe((data: boolean) => {

});