observer-pattern

You implement publish/subscribe communication by creating an Observable class with subscribe, unsubscribe, and notify methods. This enables multiple observers to receive event data and react to state changes without tight coupling.

The observer pattern works by allowing components to subscribe to an observable. When state changes occur, the observable notifies all subscribed observers, enabling reactive UI updates without components directly referencing each other.

Use the observer pattern for asynchronous workflows when multiple components need to respond to state synchronization or cross-component notifications. It allows observers to react independently to emitted events as they occur.

Yes, the Observable API provides explicit subscribe and unsubscribe methods. This allows you to dynamically attach and detach observers during the component lifecycle to control which objects receive event notifications.

The best way to decouple state synchronization is implementing an Observable API. Observers subscribe to state updates, and the observable notifies them when changes occur, ensuring cross-component notifications remain decoupled.

You should avoid the observer pattern when components require synchronous, tightly coupled execution or when event flow becomes too complex to trace. It is designed for decoupled, event-driven communication rather than direct sequential processing.