rxjs-expand-reduce - Codesandbox Explore this online rxjs-expand-reduce sandbox and experiment with it yourself using our interactive online playground You can use it as a template to jumpstart your development with this pre-built solution
Angular RxJS Reference - takeWhile - what is it, how to use it takeWhile can be used to destroy the chain and release resources once a certain value gets through For example, you subscribe to the mousemove event when a mouse enters a box and want to unsubscribe when it leaves the box
RxJS - takeWhile The output Observable emits the source values until such time as the predicate returns false, at which point takeWhile stops mirroring the source Observable and completes the output Observable