# ebidel/filer.js

A wrapper library for the HTML5 Filesystem API what reuses UNIX commands (cp, mv, ls) for its API.

Repository: https://github.com/ebidel/filer.js
Canonical: https://ross.abutalabs.com/products/filerjs
Language: JavaScript
License: NOASSERTION
License Family: other
Last push: 2019-04-11T12:59:23+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": 5551, "days_push": 2701, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1481, forks 151 (observed 2026-08-28T04:04:50.919597+00:00)

## What it is
filer.js is a well-tested JavaScript wrapper library for the HTML5 Filesystem API, which lets web applications read and write files in a sandboxed filesystem. Its API reuses familiar UNIX commands (cp, mv, ls) to make browser file I/O more approachable for developers.

## Use cases
- read and write files in a sandboxed browser filesystem
- list directory contents in a web app using ls-like API
- copy and move files in the browser with cp and mv commands
- manage persistent or temporary storage for a Chrome web app
- simplify the verbose HTML5 Filesystem API with familiar commands

## When to choose
- you are building a Chrome-only web app that needs sandboxed file I/O
- you prefer a UNIX-style API (cp, mv, ls) over the raw HTML5 Filesystem API
- you want a well-tested wrapper with a demo and documentation

## When to avoid
- you need cross-browser support, since the HTML5 Filesystem API only works in Chrome
- you need actively maintained software, as the project has not seen releases since 2019
- you need server-side or Node.js file system access

## Facets
- artifact type: library
- maturity: maintenance
- function: file-system
- domain: web-development, files, developer-tools
- platform: browser
- tags: html5-filesystem-api, unix-commands, sandboxed-filesystem, chrome-only, javascript

## Member repositories
- ebidel/filer.js (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:50.919597+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 2026-08-30T04:34:10.331020+00:00, confidence not recorded.
  - readme: https://github.com/ebidel/filer.js (fetched 2026-08-28T04:04:50.919597+00:00, sha 82ce5a48c5e9)
  - registry_npm: https://registry.npmjs.org/filer.js (fetched 2026-08-29T11:41:09.043777+00:00, sha 1778959cd1b6)
- Data as of 2026-08-30T08:39:29.467469+00:00.