Asynchronous Programming in NestJS

In programming, synchronous and asynchronous operations define how tasks are executed. Synchronous tasks run one after another in a predictable sequence. Asynchronous tasks allow tasks to run independently and concurrently. They don’t block the execution flow, enabling the program to continue working on other tasks while waiting for the completion of async tasks. Asynchronous code is essential for handling tasks with potentially long execution times, such as network requests or database queries.

Async and await

NestJS has good support for async functions. To define an asynchronous function in NestJS, we can use the async and await keywords. Below is a contrived example: