Mastering RxJS: Building State with scan() Operator
technology•Jun 16, 2026

Mastering RxJS: Building State with scan() Operator

In this article, we'll explore the scan() operator in RxJS, which allows us to build state by accumulating values over time. We'll start with simple examples and gradually move to more complex scenarios, including Redux-like state management.

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Key summary

This article is the third part of a series on RxJS, focusing on building state with the scan() operator, from simple counters to complex Redux-like state management.

TL;DR

  • RxJS scan() operator explained
  • Building state with observables
  • From counters to Redux-like state management
  • Accumulating values over time
  • State management with RxJS
  • Reactive programming in JavaScript
  • Angular and React integration
  • Understanding RxJS operators

This content is automatically summarized using AI. For full context, always refer to the original article.

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