# h5bp/Effeckt.css

This repo is archived. Thanks!

Repository: https://github.com/h5bp/Effeckt.css
Canonical: https://ross.abutalabs.com/products/effecktcss
Homepage: http://h5bp.github.io/Effeckt.css
Language: CSS
License: MIT
License Family: permissive
Archived: true
Last push: 2019-03-01T16:28:55+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": 4810, "days_push": 2742, "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 10811, forks 1345 (observed 2026-08-28T04:10:44.376763+00:00)

## What it is
Effeckt.css is a CSS library of performant, hardware-accelerated transitions and animations for UI elements like modals, buttons, list items, and page transitions. It is an archived HTML5 Boilerplate project that is no longer maintained.

## Use cases
- add subtle css transitions to modals and dialogs
- animate buttons and list items at 60fps on mobile web
- css page transition effects
- jank-free ui animations using transforms and opacity
- curated set of classy css animation effects

## When to choose
- you need lightweight, CSS-only transition effects with no JavaScript dependency
- you target mobile web and need hardware-accelerated, jank-free animations
- you want a curated collection of modal, button, and list item effects to copy from

## When to avoid
- you need an actively maintained library with modern browser support
- you want JavaScript-driven or framework-integrated animation (e.g. React Spring, Framer Motion)
- you need effects beyond the curated set, such as complex scroll or physics-based animation

## Facets
- artifact type: library
- maturity: abandoned
- function: animation, ui-components, css-framework
- domain: web-development, frontend, web-design
- platform: browser, cross-platform
- tags: css-animations, transitions, mobile-web, performance, archived

## Member repositories
- h5bp/Effeckt.css (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:44.376763+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 2026-08-29T17:17:39.139655+00:00, confidence not recorded.
  - readme: https://github.com/h5bp/Effeckt.css (fetched 2026-08-28T04:10:44.376763+00:00, sha c5419b3312c0)
  - homepage: http://h5bp.github.io/Effeckt.css (fetched 2026-08-29T08:16:41.321239+00:00, sha e9b707cce85a)
- Data as of 2026-08-30T08:39:29.467469+00:00.