re: I'm Tracy Lee, a RxJS Core Team member and Google Developer Expert, ask me anything![FINISHED] VIEW POST


RxJS is definitely a very powerful tool. But in my every day usages of async related things, I've never felt that I need to use something as powerful as RxJS to do it (instead opting to use something like async/await, promises, etc). Other than very specific use cases like making drag and drop ridiculously easy, RxJS really just felt like it was just killing a fly with a bazooka.

Do you have other examples of when you would prefer to use RxJS instead of other async related libraries?


Yeah well honestly with RxJS the benefit is that you are moving your business logic into a domain specific language - so it's much easier to copy/paste code into new frameworks and libraries without large rewrites. You're also essentially future proofing your code two ways. The first is - RxJS provides an abstraction in the form of Observable for you so that you can easily change out the inputs at a later time. The second is - later on, it's much easier to add on functionality by just adding on another operator or chaining together a set of things, again, without having to rewrite your code much.

I'd say it's super smart to kill all the flies with a bazooka because later on you may be thankful you have that abstraction in place.

Also it's just more declarative and easier to read.

I always use RxJS so I don't have other recs on other libraries! :)


One of the selling points of React is to just write JS, no need to decipher a DSL. Why doesn’t RxJS take this approach?


Depends what your working on. When I worked in FinTech you have a large stream of events coming down the pipe. Something like Rx works very well for this.


Yes! For things like backpressure, multi plex web sockets, exponential backoff, cancellation - all these are great use cases for RxJS.

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