Synchronous Executors – Completing the Pub/Sub Picture (opens in new tab)

In the previous articles, we explored two pillars of event‑driven communication: Fire‑and‑forget events – broadcasting that something happened. Callback messages – asynchronous requests that return a result via an observable. These two patterns cover the vast majority of use cases. But there is a third, often overlooked category: synchronous operations – those that must return a value immediately, without waiting for a promise or a stream. In many frontend applications, synchronous calls are ...