GoogleChrome/web-vitals
Essential metrics for a healthy site. observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 99
- 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: 2354
- days_rel: n/a
- days_push: 7
- n_releases_24m: 0
Adoption not part of the score
8593 stars · 521 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
A tiny (~3KB) JavaScript library from Google for measuring Web Vitals metrics (CLS, INP, LCP, FCP, TTFB) on real users in the browser, matching how Chrome measures them. It reports metrics via callbacks so results can be sent to analytics endpoints.
Use cases
- measure core web vitals on real users
- track CLS LCP INP in production
- send page performance metrics to analytics
- monitor real user performance of my website
- collect RUM performance data in the browser
- report web vitals to google analytics
When to choose
- you need field (real-user) Web Vitals measurements matching Chrome's methodology
- you want a tiny, dependency-free metrics library for any website
- you want to pipe Core Web Vitals into your own analytics or RUM backend
When to avoid
- you need lab/synthetic load testing rather than real-user measurement
- you need a full RUM platform with dashboards rather than a measurement library
- you need server-side or non-browser performance monitoring
Facets
library · maturity active
analytics monitoring developer-tools web-development frontend performance analytics browser web-vitals core-web-vitals rum performance-metrics cls lcp inp real-user-monitoring nodejs
5 sources
- readme: https://github.com/GoogleChrome/web-vitals · fetched 2026-08-28 · 8a493b3d7fcc
- homepage: https://web.dev/vitals · fetched 2026-08-29 · adfac481a596
- site_page: https://web.dev/about · fetched 2026-08-29 · d223d27e33e8
- site_page: https://web.dev/articles/vitals-measurement-getting-started · fetched 2026-08-29 · c127e87c3ef8
- site_page: https://web.dev/articles/lab-and-field-data-differences · fetched 2026-08-29 · e036866da089
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| GoogleChrome/web-vitals | main | 77 |
For agents
markdown · JSON · MCP: product_card(name="GoogleChrome/web-vitals")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem