Decorators are helpful for anything you want to transparently wrap with extra functionality. These include memoization, enforcing access control and authentication, instrumentation and timing functions, logging, rate-limiting, and the list goes on.
Because twenty-five other explanations weren't enough, here I will explain JavaScript promises. This tutorial is intended for people who already understand JavaScript.
With all the new libraries and frameworks it is pretty hard to keep up with all of them, and that is if you can even decide which ones are worth spending time over.
When it comes to applications intended to last, I think we all want to have simple code that’s easier to maintain. Where we often really disagree is how to accomplish that.
T. Ugawa, S. Marr, and R. Jones. Proceedings of the 14th ACM SIGPLAN International Workshop on Virtual Machines and Intermediate Languages, page 11. ACM, (Dec 5, 2022)