ruanyf/es-checker
A feature detection library for ECMAScript in node.js and browser. observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4083
- days_rel: n/a
- days_push: 2605
- n_releases_24m: 0
Adoption not part of the score
1019 stars · 151 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A feature detection library that checks how much of ECMAScript 6 (ES2015) a JavaScript runtime supports, usable from the command line, Node.js, or the browser. It exposes boolean flags for individual ES6 features like let/const, arrow functions, generators, and classes.
Use cases
- check which ES6 features my browser supports
- detect if node supports let and const before using them
- run es-checker from the command line to see ES6 support
- feature-test arrow functions and generators at runtime
- show a demo page of ECMAScript 2015 support
When to choose
- you need runtime ES6 feature detection in legacy environments or old browsers
- you want a quick CLI report of a JavaScript engine's ES6 support
When to avoid
- you target modern runtimes where ES6 is universally supported
- you need up-to-date detection of newer ECMAScript versions (ES2017+)
- you need an actively maintained dependency
Facets
library · maturity abandoned
developer-tools cli developer-tools programming-languages web-development browser cli cross-platform ecmascript es6 feature-detection javascript nodejs
3 sources
- readme: https://github.com/ruanyf/es-checker · fetched 2026-08-28 · 619f45d3a33b
- homepage: http://ruanyf.github.io/es-checker · fetched 2026-08-29 · 179ed96b1437
- registry_npm: https://registry.npmjs.org/es-checker · fetched 2026-08-29 · adba4a574e50
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ruanyf/es-checker | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="ruanyf/es-checker")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem