What's a good existing way to deal with this use-case? Is there a useful library that wraps setTimeout / other logic to determine the quality of a user's internet connection in case of very poor connectivity (2G etc) ?
The way to handle this case is to use Promise.race with 2 promises. The first promise is your logic. The second promise is rejected after a timeout. For more detail read the section "never calling the callback" from "you don't know js" book on "async" in chapter 3
https://github.com/getify/You-Dont-Know-JS/blob/master/async...
In react native, NetInfo has an api to detect network changes and I use that to stop all my setIntervals and start again with a different set of args, including wait time before calling again.
