# staltz/rxmarbles

Interactive diagrams of Rx Observables

Repository: https://github.com/staltz/rxmarbles
Canonical: https://ross.abutalabs.com/products/rxmarbles
Homepage: http://www.rxmarbles.com
Language: JavaScript
License: BSD-3-Clause
License Family: permissive
Archived: true
Last push: 2021-10-26T12:15:21+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4431, "days_push": 1772, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4196, forks 545 (observed 2026-08-28T04:08:38.870983+00:00)

## What it is
RxMarbles is a web application providing interactive diagrams of Rx Observables, letting users drag marbles on input streams to see how operators react. It is built with Cycle.js and hosted at rxmarbles.com.

## Use cases
- learn how RxJS operators transform streams
- visualize observable marble diagrams interactively
- teach reactive programming concepts to a team
- experiment with operator behavior by dragging inputs
- share direct links to specific operator examples

## When to choose
- you want an interactive, visual way to understand Rx operators
- you are teaching or learning reactive programming
- you need a reference of marble diagrams for Rx operators

## When to avoid
- you need actively maintained or updated tooling
- you need diagrams for operators beyond the current set
- you want a programmatic library rather than a learning webapp

## Facets
- artifact type: application
- maturity: maintenance
- function: data-visualization, animation, ui-components
- domain: education, frontend, web-development, tutorials
- platform: browser
- tags: reactive-programming, rxjs, observables, interactive-learning, cyclejs, marble-diagrams, web-server, javascript

## Member repositories
- staltz/rxmarbles (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:38.870983+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:22:34.529861+00:00, confidence not recorded.
  - readme: https://github.com/staltz/rxmarbles (fetched 2026-08-28T04:08:38.870983+00:00, sha 0c1fe7b3b6bf)
  - homepage: http://www.rxmarbles.com (fetched 2026-08-29T09:13:13.429758+00:00, sha 0a0dff12e28b)
- Data as of 2026-08-30T08:39:29.467469+00:00.