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The "switchMap Exercise" Lesson is part of the full, Rx.js Fundamentals course featured in this preview video. Here's what you'd learn in this lesson:

Students are instructed to use switchMap to switch between an interval timer and NEVER based on the "Start" and "Stop" buttons.

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Transcript from the "switchMap Exercise" Lesson

>> So with that, what we kind of wanna do is see if we can get that working with our counter. Because we have a lot of the infrastructure in here. We had a play in a pause button, we had an observable that we care about. What we wanna do is now take, we wanna merge together those two buttons in our basic counter, right?

[00:00:19] And then we wanna switch between that interval observable and never based on the given state that we're in at a given point