# Bootstrap

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

Repository: https://github.com/twbs/bootstrap
Canonical: https://ross.abutalabs.com/products/bootstrap
Homepage: https://getbootstrap.com
Language: MDX
License: MIT
License Family: permissive
Topics: css, bootstrap, javascript, html, scss, css-framework, sass
Last push: 2026-08-25T19:48:08+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 32, longevity 100
- inputs: {"age_days": 5514, "days_push": 8, "days_rel": 373, "gap_med": 36.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 174656, forks 78639 (observed 2026-08-28T04:12:24.447244+00:00)

## What it is
Bootstrap is the most popular HTML, CSS, and JavaScript framework for building responsive, mobile-first websites and web applications. It provides a comprehensive set of prebuilt components, a grid system, and Sass-based styling for faster front-end development.

## Use cases
- build a responsive website without writing custom css
- rapidly prototype a web app ui
- create a mobile-first landing page
- style forms, modals, and navbars with prebuilt components
- use a grid system for page layouts
- customize theme colors with sass variables

## When to choose
- you need a battle-tested, widely documented css framework with a huge ecosystem
- you want to ship a responsive ui quickly without a design system of your own
- your team wants consistent, prebuilt components like dropdowns, modals, and carousels

## When to avoid
- you need a highly custom, unique visual design out of the box
- you prefer utility-first styling like tailwind css
- you want a full application framework with state management rather than styling

## Facets
- artifact type: framework
- maturity: stable
- function: css-framework, ui-components, frontend-framework, templating
- domain: web-development, frontend, web-design
- platform: cross-platform
- tags: responsive-design, mobile-first, sass, scss, html, javascript-components, grid-system, web-server, nodejs

## Member repositories
- twbs/bootstrap (main) score 76
- twbs/bootstrap-sass (sdk) score 50
- twbs/bootstrap-rubygem (sdk) score 59

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:24.447244+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 2026-08-29T16:10:46.645318+00:00, confidence not recorded.
  - readme: https://github.com/twbs/bootstrap (fetched 2026-08-28T04:12:24.447244+00:00, sha f8489461748e)
- Data as of 2026-08-30T08:39:29.467469+00:00.