# orbitjs/orbit

Composable data framework for ambitious web applications.

Repository: https://github.com/orbitjs/orbit
Canonical: https://ross.abutalabs.com/products/orbitjs-orbit
Homepage: https://orbitjs.com
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-01-31T20:23:18+00:00

## Health v2 (maintenance only)
Score: 52/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 65, release rhythm 8, longevity 100
- inputs: {"age_days": 4801, "days_push": 214, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2340, forks 133 (observed 2026-08-28T04:06:38.619091+00:00)

## What it is
Orbit is a composable TypeScript data framework for orchestrating access, transformation, and synchronization across multiple data sources such as REST servers, WebSockets, IndexedDB, and in-memory stores. It provides Git-like deterministic change tracking, offline support with queued sync, and optimistic/pessimistic request coordination for web applications.

## Use cases
- sync data between a REST API and local IndexedDB cache
- build an offline-first web app that queues changes while offline
- implement undo/redo editing in a client-side app
- manage a client-side ORM with a shared schema across sources
- fork and merge immutable data stores for branching caches
- coordinate optimistic and pessimistic updates across data sources

## When to choose
- your app needs offline support with automatic synchronization when back online
- you need to coordinate data across multiple sources like REST, WebSocket, and local storage
- you want deterministic change tracking with fork/merge semantics
- you need undo/redo or optimistic UI patterns in a data-heavy SPA

## When to avoid
- you need a simple REST client with minimal data layer complexity
- your project requires a battle-tested 1.0 release rather than a 0.x version
- you want a full backend ORM for server-side relational databases
- your team cannot invest in learning a niche data framework with a small community

## Facets
- artifact type: framework
- maturity: active
- function: orm, state-management, caching, data-science, serialization, middleware
- domain: web-development, frontend, backend, databases
- platform: browser, cross-platform
- tags: client-side-orm, offline-first, data-synchronization, typescript, undo-redo, optimistic-ui, data-sources, offline, nodejs

## Member repositories
- orbitjs/orbit (main) score 52

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:38.619091+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 2026-08-30T02:37:25.744634+00:00, confidence not recorded.
  - readme: https://github.com/orbitjs/orbit (fetched 2026-08-28T04:06:38.619091+00:00, sha e946f92dc1ab)
  - homepage: https://orbitjs.com (fetched 2026-08-29T10:18:11.899465+00:00, sha 80b134a9a076)
  - site_page: https://orbitjs.com/docs/intro (fetched 2026-08-29T10:18:11.901895+00:00, sha 6e694a7aac60)
  - site_page: https://orbitjs.com/docs/api (fetched 2026-08-29T10:18:11.903945+00:00, sha 0fba69e174d6)
  - site_page: https://orbitjs.com/docs/0.16/intro (fetched 2026-08-29T10:18:11.905876+00:00, sha 76108323ef6c)
  - site_page: https://orbitjs.com/docs/0.15/intro (fetched 2026-08-29T10:18:11.907831+00:00, sha d1c068bd62ff)
- Data as of 2026-08-30T08:39:29.467469+00:00.