JavaScript received a lot of attention and acceptance after it introduced Promises in 2015.
Before promises, writing asynchronous code (involving input/output, API requests, database queries, etc.) was very difficult and unmanageable.

I'm baffled by the changes that happened around how to asynchronous code in JavaScript in a short period of time and I've written an article on it.

https://dev.to/gaurang847/the-odyssey-of-asynchronous-javascript-jlf