Engrain by ByteRush

JS.16.10 Senior

Observable, signals and store

Comes up in: Coding, Low-level design

This concept is being written. It gets the full five steps — explanation, predict, interview angle, practice with tests, and review cards. Here is exactly what it will cover, so you can study it elsewhere in the meantime.

What it covers

  • minimal observable (subscribe/unsubscribe)
  • signal with computed and effect (dependency tracking)
  • Redux-like createStore(reducer) with subscribe and middleware

Words you will know

signalreactivestoremiddleware

What you will practise

  • implement createStore and a tiny signals library

Interview questions this answers

  • Implement a Redux-style store with subscribe.