# Semantic UI

Semantic is a UI component framework based around useful principles from natural language.

Repository: https://github.com/Semantic-Org/Semantic-UI
Canonical: https://ross.abutalabs.com/products/semantic-ui
Homepage: http://www.semantic-ui.com
Language: JavaScript
License: MIT
License Family: permissive
Topics: ui, ui-components, flexbox, css-framework, dropdown, button, popup, sidebar, tooltip, semantic
Last push: 2024-11-27T21:01:48+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4895, "days_push": 644, "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 51027, forks 4855 (observed 2026-08-28T04:12:11.821683+00:00)

## What it is
Semantic UI is a CSS/JS UI component framework offering 50+ elements with deep theming via 3000+ CSS variables and LESS-based variable inheritance. It ships as core, CSS-only, LESS-only packages plus official integrations like Semantic UI React.

## Use cases
- build responsive websites with prebuilt ui components
- theme a component library with css variables
- add dropdowns, popups, and sidebars to a website
- use semantic ui components in react
- style a site with a flexbox-friendly css framework

## When to choose
- you want highly customizable theming with css variables and less
- you need a mature, production-ready component set without a heavy js framework
- you are maintaining an existing semantic ui codebase or using semantic-ui-react

## When to avoid
- you are starting a new project needing active development and modern tooling
- you want a react-first component library with typescript support
- you need tailwind-style utility classes rather than semantic class names

## Facets
- artifact type: framework
- maturity: maintenance
- function: ui-components, css-framework, frontend-framework, theme
- domain: web-development, frontend, web-design
- platform: cross-platform
- tags: semantic-ui, less, theming, flexbox, javascript, react-bindings, web-server, nodejs

## Member repositories
- Semantic-Org/Semantic-UI (main) score 23
- Semantic-Org/Semantic-UI-React (sdk) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:11.821683+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 2026-08-29T16:19:49.492030+00:00, confidence not recorded.
  - readme: https://github.com/Semantic-Org/Semantic-UI (fetched 2026-08-28T04:12:11.821683+00:00, sha e25354dba454)
- Data as of 2026-08-30T08:39:29.467469+00:00.