What is CLS by browser search
CLS by browser search shows how Cumulative Layout Shift (CLS) behaves based on whether the user triggered their browser’s in-page search (typically with Ctrl+F or ⌘+F) during the session.
While in-page search may seem unrelated to layout shifts, it often reveals issues on long or dynamically structured pages — especially if searching causes content to jump, expand, or load late.
Healthy CLS by browser search sample
In a healthy experience:
Both searchers and non-searchers experience low CLS
Content remains visually stable when a user searches for terms
No hidden or collapsed content shifts position unexpectedly when revealed via search
This suggests your layout is structured well, responsive to interaction, and doesn’t rely on late loading or on-demand expansion of key elements.
Unhealthy CLS by browser search sample
When CLS is worse during in-page search:
Lazy-loaded sections (like accordions or expandable FAQs) may suddenly shift visible layout when matched text is revealed
Searching causes the page to jump to anchors or headings, triggering shifts if surrounding elements aren’t properly sized
Font or layout reflows could still be occurring, especially if search happens early in the session
If non-search sessions show higher CLS, it could reflect foundational layout issues that affect all users — not just those interacting with search.
Resolving unhealthy CLS by browser search
Go-to action plan to resolve an unhealthy CLS by browser search:
Ask Uxi to analyze your CLS by browser search values and suggest improvements
Use Filters to isolate pages where search causes layout movement.
Simulate CLS of the suspected lens to see if fixing it will resolve the CLS by browser search. If yes, this is where the resolution focus should be.
Use an automated CLS optimization tool like Navigation AI to improve your CLS by browser search values
Once you’ve improved CLS, set an alert to be the first to know if it starts worsening again.
Try it yourself
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