useChannelEffect

Side-effect counterpart to useChannel. Instead of returning a reactive buffer, it invokes onEvent once per event for as long as the calling scope is alive — the idiomatic place for analytics, logging, and other fire-and-forget side effects.

useChannelEffect(stream, ["lifecycle", "tools"], {
  replay: false,
  onEvent(event) {
    sendAnalytics(event);
  },
  onError(error) {
    logger.error(error);
  },
});

Reactive channels / target / enabled re-bind the subscription when they change. The underlying subscription is shared (ref-counted) with any matching useChannel consumer. replay defaults to false (live-only); events buffered before the effect attaches are not re-delivered.

Must be called from a component setup() (or another effect scope) so the subscription is torn down on onScopeDispose.