# toss/frontend-fundamentals

Essential principles for frontend development

Repository: https://github.com/toss/frontend-fundamentals
Canonical: https://ross.abutalabs.com/products/frontend-fundamentals
Homepage: https://frontend-fundamentals.com
Language: TypeScript
License: MIT
License Family: permissive
Topics: code-quality, frontend, bundling, guideline
Last push: 2026-03-08T05:00:01+00:00

## Health v2 (maintenance only)
Score: 53/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 71, release rhythm 35, longevity 44
- inputs: {"age_days": 623, "days_push": 178, "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 1991, forks 209 (observed 2026-08-28T04:06:03.126131+00:00)

## What it is
Frontend Fundamentals (FF) is a community-driven collection of essential principles for building reliable, maintainable, and accessible frontend applications, published as a multilingual documentation site. It covers code quality, bundling behavior, accessibility (a11y), and debugging fundamentals with concrete do's and don'ts.

## Use cases
- learn principles for judging frontend code quality
- understand why bundling differs between dev and production
- review UI code for accessibility best practices
- set shared code standards for a frontend team
- improve code review skills with real improvement examples
- debug persistent frontend bugs by revisiting fundamentals

## When to choose
- you want curated, principle-based guidelines for writing maintainable frontend code
- your team is establishing shared frontend coding standards
- you need concrete accessibility do's and don'ts for UI code review

## When to avoid
- you need a runnable library, framework, or tool rather than documentation
- you need exhaustive framework-specific tutorials instead of general principles

## Facets
- artifact type: learning-resource
- maturity: active
- function: documentation, developer-tools
- domain: frontend, web-development, tutorials, developer-tools, accessibility
- platform: cross-platform
- tags: frontend-guidelines, code-quality, bundling, accessibility, debugging, best-practices, code-review, web-server

## Member repositories
- toss/frontend-fundamentals (main) score 53

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:03.126131+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 2026-08-30T03:02:43.045159+00:00, confidence not recorded.
  - readme: https://github.com/toss/frontend-fundamentals (fetched 2026-08-28T04:06:03.126131+00:00, sha 342e89e6d4a9)
  - homepage: https://frontend-fundamentals.com (fetched 2026-08-29T10:42:47.993775+00:00, sha 7096e880223c)
- Data as of 2026-08-30T08:39:29.467469+00:00.