Test Introduction to RxJS
Test RxJS with answers to assess your knowledge and prepare for job interviews. Assess your technical level in 20 minutes.
Test details
RxJS is the ReactiveX implementation for JavaScript.
It was an implementation of the watcher pattern. After its development, later programming libraries were developed around major languages such as .NET and JavaScript.
The ReactiveX project was originally started by Matthew Podwysocki and others as an independent open source project for Microsoft.
It was then quickly used by companies like Netflix with RxJava.
Currently the main maintainer of RxJS is Ben Lesh. (previously developer at Google and Netflix)
Test author : Amine Boucham
Amine Boucham is an independent developer at MyLabz (Previously a developer for NGE-Connect), having discovered reactive programming during his first mission, he is trying to become an expert in this field.
This concept is not always clearly understood and its importance is underestimated so he tries to bring the benefits of using this programming paradigm in business.
Sample question
I wana listen to an input field in order to offer auto-completion to my user.
const input = document.getElementById(id)
fromEvent(input, 'keydown').pipe(
***************,
map(e => e.target.value)
)
By which operator can I replace ******* to avoid making an API call each time the user presses a key?
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