@open-wa/hyperemitter

Source: packages/hyperemitter/README.md

@open-wa/hyperemitter is a typed event emitter used by Open-WA packages. It supports exact event names, + and # wildcard subscriptions, one-time listeners, catch-all listeners, and listener cleanup with an AbortSignal.

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import { HyperEmitter } from '@open-wa/hyperemitter';

type Events = {
  'message.received': { id: string; body: string };
  'session.state.changed': { state: string };
};

const events = new HyperEmitter<Events>();

events.on('message.received', (message) => {
  console.log(message.id, message.body);
});

events.emit('message.received', { id: 'message-id', body: 'Hello' });

The repository also contains a benchmark runner for comparing other emitter libraries. Its results are measurements from that runner, not a performance guarantee.

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Apache-2.0