zertosh/invariant
invariant observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4361
- days_rel: n/a
- days_push: 1724
- n_releases_24m: 0
Adoption not part of the score
1230 stars · 71 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A tiny JavaScript library mirroring Facebook's `invariant` helper that throws descriptive errors in development and generic errors in production. It is widely used as a dependency in React ecosystem packages.
Use cases
- assert a condition is true and throw otherwise
- provide detailed error messages in dev but generic ones in production
- strip error messages from production bundles via minification
- validate function arguments in libraries
When to choose
- you need a tiny, battle-tested assertion helper compatible with browserify/envify
- you want dev-only descriptive errors that minify away in production
When to avoid
- you want rich assertion APIs with many matchers (use chai or assert)
- you need TypeScript-native assertion functions with type narrowing
Facets
library · maturity maintenance
error-handling testing developer-tools web-development browser cross-platform assertions invariant-condition minification-friendly facebook-mirror javascript nodejs
2 sources
- readme: https://github.com/zertosh/invariant · fetched 2026-08-28 · d31e0314d892
- registry_npm: https://registry.npmjs.org/invariant · fetched 2026-08-29 · 368e29bcca93
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| zertosh/invariant | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="zertosh/invariant")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem