# substance/substance

A JavaScript library for web-based content editing.

Repository: https://github.com/substance/substance
Canonical: https://ross.abutalabs.com/products/substance
Homepage: https://substance.io
Language: JavaScript
License: MIT
License Family: permissive
Topics: text-editor, editing, html, xml, annotations, publishing, javascript
Last push: 2026-04-02T16:06:07+00:00

## Health v2 (maintenance only)
Score: 57/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 75, release rhythm 8, longevity 100
- inputs: {"age_days": 4031, "days_push": 153, "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 2733, forks 121 (observed 2026-08-28T04:07:16.171798+00:00)

## What it is
Substance is a JavaScript library for building web-based content editing experiences. It provides building blocks for creating custom text editors and web-based publishing systems.

## Use cases
- build a custom rich text editor in the browser
- create a web-based publishing platform
- add structured content editing with annotations to a web app
- implement collaborative document editing UI
- edit HTML or XML documents in the browser

## When to choose
- you need fine-grained control over a custom web text editor
- you are building a publishing or annotation-focused editing tool
- you want a library of editor building blocks rather than a turnkey editor

## When to avoid
- you just need a ready-made WYSIWYG editor with minimal setup
- you need a native desktop or mobile editor
- you want a heavily maintained project with a large active community

## Facets
- artifact type: library
- maturity: maintenance
- function: editor, ui-components, templating
- domain: web-development, frontend, text-editors
- platform: browser
- tags: content-editing, text-editor, annotations, html, xml, publishing, javascript, nodejs

## Member repositories
- substance/substance (main) score 57

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:16.171798+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 2026-08-30T02:14:30.545703+00:00, confidence not recorded.
  - readme: https://github.com/substance/substance (fetched 2026-08-28T04:07:16.171798+00:00, sha 38e0ade673a2)
- Data as of 2026-08-30T08:39:29.467469+00:00.