2021-10-14
1477
#rxjs#typescript
Emmanuel John
70910
Oct 14, 2021 ⋅ 5 min read

Using RxJS Observables to transform data in TypeScript

Emmanuel John I'm a full-stack software developer, mentor, and writer. I am an open source enthusiast. In my spare time, I enjoy watching sci-fi movies and cheering for Arsenal FC.

Recent posts:

The different ways to use CSS :has(), with examples

The CSS :has() pseudo-class is a powerful new feature that lets you style parents, siblings, and more – writing cleaner, more dynamic CSS with less JavaScript.

Daniel Schwarz
Oct 24, 2025 ⋅ 7 min read

Kombai AI: The AI agent built for frontend development

Kombai AI converts Figma designs into clean, responsive frontend code. It helps developers build production-ready UIs faster while keeping design accuracy and code quality intact.

Jude Miracle
Oct 23, 2025 ⋅ 7 min read

The Replay (10/22/25): AI-assisted coding, Wasm 3.0, and more

Discover what’s new in The Replay, LogRocket’s newsletter for dev and engineering leaders, in the October 22nd issue.

Matt MacCormack
Oct 22, 2025 ⋅ 29 sec read
Where AI-assisted coding accelerates development — and where it doesn’t

Where AI-assisted coding accelerates development — and where it doesn’t

John Reilly discusses how software development has been changed by the innovations of AI: both the positives and the negatives.

John Reilly
Oct 22, 2025 ⋅ 12 min read
View all posts

2 Replies to "Using RxJS Observables to transform data in TypeScript"

  1. Svelte is a much better system for Observables. It requires setting up its dev tools. As it compiles observable code according to how it is being used.

    With rxjs, never ever use subscribe or unsubscribe yourself. Leave it to a framework such as Angular. Don’t put yourself in a place that a memory leak could happen. Even if it never does. Knockout.js deprecation is a good example why.

  2. Yes, this is something I agree with.
    Managing subscriptions ourselves can be risky because we might forget to unsubscribe from the Observable, resulting in a memory leak.

    Svelte manages our subscriptions on our behalf. This, in my opinion, makes it one of the most reactive frameworks.

    Considering Node.js where there are no native Observables, we are left to manage subscriptions ourselves.

Leave a Reply

Would you be interested in joining LogRocket's developer community?

Join LogRocket’s Content Advisory Board. You’ll help inform the type of content we create and get access to exclusive meetups, social accreditation, and swag.

Sign up now