The State of Web Vitals

JavaScript frameworks on React sites

Field data PhoneDesktopAll Scope All sites October 2026 edition · Desktop field outcomes · React sites only
React Scoped to 9,570 sites out of 210,902 analyzed (frameworks) Compare with all sites →
No React slice for this metric in this edition — the slice contract does not cover it for frameworks (or the served data predates it). The fleet view has it.
Related signals Consent platforms → Ad networks on page → Third-party categories → Optimization plugins → By Arjen Karel · 9,570 crawled React sites (1,979 with desktop Chrome field data, October 2026) · How we measured