Chrome adds experimental soft navigation Core Web Vitals to CrUX

Key points

• Three experimental fields in CrUX count soft navigations, available in BigQuery, the CrUX API, and the History API from the October 13 release.
• Most origins have little soft navigation traffic, so the change is expected to matter mainly for SPAs that update content without full reloads.
• Stable scores are unchanged; Chrome aims to end the experimental phase in May 2027, and Search Console will adopt the data then.
• On SPA-heavy sites, all three metrics score higher; the CrUX Vis toggle lets teams compare stable and experimental numbers side by side.

Why it matters for marketers: SPA-heavy sites should check the CrUX Vis toggle now, since experimental scores may shift before Search Console adopts them.