How Chrome’s Soft Navigation Metrics Change SPA SEO Tracking
Google’s new soft‑navigation metrics in CrUX separate SPA page‑change data from the initial load. Learn how to use them for better SEO and Core Web Vitals reporting.
Google announced experimental soft‑navigation metrics for LCP, INP and CLS in the Chrome User Experience Report (CrUX) on October 13, 2026. The metrics count in‑app page changes that a single‑page application (SPA) makes without a full reload. They are available via BigQuery, the CrUX API and the CrUX Vis toggle.
Why it matters: before this change CrUX only measured the first load of an SPA. All subsequent interactions were rolled into that single measurement, inflating or deflating the scores for the landing URL. With the new fields—experimental_largest_contentful_paint_with_softnavs, experimental_interaction_to_next_paint_with_softnavs and experimental_cumulative_layout_shift_with_softnavs—each soft navigation gets its own data point.
Who sees a difference?
The source notes that about 70 % of origins in CrUX have little or no soft‑navigation traffic, so most sites probably won’t notice much of a change. Sites that rely heavily on soft navigations—especially the top 1,000 sites where 35 % on Android and 42 % on desktop have more than half of page views as soft navigations—are the ones that will see a shift in their experimental scores.
What the metrics reveal
- LCP with soft navigations tends to improve for SPA‑heavy sites because follow‑up clicks are faster than a full page reload.
- INP now measures responsiveness per page view rather than the slowest interaction across a session, roughly doubling Android pass rates for sites that rely mainly on soft navigations.
- CLS groups layout‑shift events by view instead of session, bringing SPA‑heavy desktop sites in line with multi‑page sites.
How to start using the data
- Open CrUX Vis and enable the “Include soft navigations” toggle to compare experimental and stable scores side‑by‑side.
What to do now for SEO
- Audit your SPA’s navigation flow. Identify any routes where large JavaScript bundles load on soft navigation and consider code‑splitting or lazy‑loading to keep LCP low.
- Add or refine `rel=preload` and `rel=preconnect` hints for assets that are required on the next view, helping the browser render the next page fragment faster.
- Feed any significant shifts back to Chrome via the web‑vitals feedback group, as the metrics are still experimental and Chrome welcomes user feedback.
Why SEO services matter now
Interpreting the new soft‑navigation data requires a mix of technical SEO, performance engineering and ongoing monitoring. Our SEO Services can help you:
- Set up automated CrUX queries that surface soft‑navigation LCP, INP and CLS for every key route in your SPA.
- Conduct a performance audit focused on in‑app transitions, recommending code‑splitting, caching strategies and resource hints.
- Create a reporting framework that tracks both experimental and stable Core Web Vitals, so you can act before the metrics graduate to stable status in May 2027.
Next step
Enable the soft‑navigation toggle in CrUX Vis today, pull the experimental metrics for your most‑visited SPA routes, and share the findings with your SEO team or agency. If you need help turning those numbers into actionable fixes, reach out to our SEO Services team.
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Frequently asked questions.
No. The source states that if your site doesn’t use JavaScript to dynamically swap content and update the URL without a full reload, you won’t see any changes in the metrics.
Chrome plans to conclude the experimental status in May 2027, subject to feedback, after which Search Console is expected to adopt the new data.
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