ee-typed

ee-typed

TypeScript version of the nodejs events module.

Usage

This is just the built-in nodejs event emitter with type information added, so you can use it like the official docs:

// Add the -ts suffix to the imported module
import { EventEmitter } from 'ee-typed';

// Specify the types of all your events
type Events = {
  event(): void;
};

// Include the Events type as a generic below
class MyEmitter extends EventEmitter<Events> {}

const myEmitter = new MyEmitter();
myEmitter.on('event', () => {
  console.log('an event occurred!');
});
myEmitter.emit('event');

myEmitter.emit(42);
// Error: Argument of type '42' is not assignable to parameter of
//        type '"event"'. ts(2345)

Based on typed-emitter

This package builds on typed-emitter.

typed-emitter has the advantage of being a type-only library, so it adds zero bytes to your bundle. However, that approach requires you to import the regular events library and then cast to the provided type.

This library provides the actual class with the appropriate cast, which I feel is simpler. Worthy of the few dozen bytes it adds to your bundle I'd say.