# phosphorjs/phosphor

The PhosphorJS Library

Repository: https://github.com/phosphorjs/phosphor
Canonical: https://ross.abutalabs.com/products/phosphor
Language: TypeScript
License: BSD-3-Clause
License Family: permissive
Archived: true
Last push: 2019-12-14T06:45:42+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4194, "days_push": 2454, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1046, forks 165 (observed 2026-08-28T04:03:21.653343+00:00)

## What it is
PhosphorJS is a TypeScript library providing widgets, layouts, collections, signaling, and messaging primitives for building rich web UIs. The project is archived and no longer maintained.

## Use cases
- build dockable panel layouts in a web app
- widget toolkit for typescript single-page apps
- signaling and messaging primitives for frontend components
- custom dom layout containers
- build desktop-like web interfaces

## When to choose
- you need a proven widget/layout library and are comfortable maintaining a fork yourself
- you're working on an existing codebase already built on PhosphorJS

## When to avoid
- starting a new project - the repo is archived with no updates since 2019
- you want community support or bug fixes
- consider active forks like Lumino instead

## Facets
- artifact type: library
- maturity: abandoned
- function: ui-components, state-management, middleware
- domain: frontend, web-development, developer-tools
- platform: browser, cross-platform
- tags: widget-toolkit, dom-layout, signaling, typescript, archived, nodejs

## Member repositories
- phosphorjs/phosphor (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:21.653343+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 2026-08-30T07:01:59.107258+00:00, confidence not recorded.
  - readme: https://github.com/phosphorjs/phosphor (fetched 2026-08-28T04:03:21.653343+00:00, sha a5e8b9ff43d0)
  - registry_npm: https://registry.npmjs.org/phosphor (fetched 2026-08-29T13:02:38.767812+00:00, sha 0156bd1a3c7b)
- Data as of 2026-08-30T08:39:29.467469+00:00.