Consume a Stream of Events Using the FromEvent Operator in RxJS

Laurie Barth
InstructorLaurie Barth

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Published 3 years ago
Updated 2 years ago

Learn how you can use fromEvent as if it were addEventListener. Create an observable stream of actions on an HTML DOM element.

Instructor: [00:01] Import the fromEvent operator from RxJS. Next, create an observable using the fromEvent operator that listens to the entire document for a click event. Subscribe to the observable and pass in an observer that logs out each event. Now we can click on the document and see our event stream.

[00:33] If we change our observer to just type out clicked, we'll see similar behavior. Now, we can use document.getElementsByTagName to access the button on our page. We can then listen for clicks directly on the button. As we can see, this is similar to fromEvent listener, but using an observable.