# dinbror/blazy

Hey, be lazy! bLazy.JS is a lightweight pure JavaScript script for lazy loading and multi-serving images. It's working in all modern browsers including IE7+.

Repository: https://github.com/dinbror/blazy
Canonical: https://ross.abutalabs.com/products/blazy
Homepage: http://dinbror.dk/blazy
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2019-12-11T09:39:19+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4787, "days_push": 2457, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2591, forks 339 (observed 2026-08-28T04:07:02.953854+00:00)

## What it is
bLazy is a lightweight pure JavaScript library (under 1.4KB gzipped) for lazy loading and multi-serving images, iframes, videos, and other src-based elements. It supports srcset, the picture element, retina serving, and background images without any third-party dependencies.

## Use cases
- lazy load images as the user scrolls
- serve responsive images with srcset and picture element
- serve retina images on high-dpi devices
- lazy load iframes and HTML5 videos
- reduce bandwidth and speed up page load
- lazy load background images

## When to choose
- you need a tiny dependency-free lazy loader for legacy browsers including IE7+
- you want multi-serving of responsive/retina images in an older codebase without native loading=lazy support

## When to avoid
- you target only modern browsers - native loading="lazy" and IntersectionObserver cover most needs
- you need an actively maintained library - the last release was in 2019 and the demo site is down

## Facets
- artifact type: library
- maturity: abandoned
- function: image-processing, ui-components
- domain: web-development, frontend, performance
- platform: browser
- tags: lazy-loading, responsive-images, srcset, vanilla-js, no-dependencies, retina-images, javascript

## Member repositories
- dinbror/blazy (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:02.953854+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 2026-08-30T02:22:18.630827+00:00, confidence not recorded.
  - readme: https://github.com/dinbror/blazy (fetched 2026-08-28T04:07:02.953854+00:00, sha d4546221729e)
  - homepage: http://dinbror.dk/blazy (fetched 2026-08-29T10:04:48.524678+00:00, sha c2c769a533b2)
  - registry_npm: https://registry.npmjs.org/blazy (fetched 2026-08-29T10:04:48.533550+00:00, sha 30a93b35d6f5)
- Data as of 2026-08-30T08:39:29.467469+00:00.