State Management · Senior · Question 72 of 75

When is an event bus better than shared state for cross-feature communication?

✓Correct answer: For one-off notifications ("order placed", "show toast") where listeners react but nobody needs the value later
2For data that components need to read at any time
3Never - events are always worse

Explanation

Storing transient events in state leads to flags that must be reset. Events decouple producers and consumers; persistent facts belong in state.

Further reading

Test yourself

Take the State Management · Senior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.