Async Local Storage in JavaScript

Async local storage is a new API in JavaScript that allows you to define a store inside a function, which can be accessed anywhere down the call stack. It provides a way to share data between multiple function calls without passing references or values manually. It is particularly useful for logging and tracing request IDs, user sessions, and user preferences. It can also simplify console logging by storing data like show numbers and accessing it in different functions. However, using async local storage may present some challenges, such as testing and potential memory leaks if not handled properly.