Challenge we solve
How we solve Missing Font Display, Swap
In our experience, missing font display, swap means a @font face declaration doesn't specify the swap value, so by default the browser follows the "block" behavior in many rendering engines, hiding text for up to a few seconds while the custom web font loads. This happens when developers add web fonts without configuring the font display property. The result is an invisible text flash (FOIT) that delays perceived content readiness and directly hurts the Largest Contentful Paint and Cumulative Layout Shift metrics used in Core Web Vitals and page experience ranking.
How we solve Missing Font Display, Swap
In our experience, missing font display, swap means a @font face declaration doesn't specify the swap value, so by default the browser follows the "block" behavior in many rendering engines, hiding text for up to a few seconds while the custom web font loads. This happens when developers add web fonts without configuring the font display property. The payoff is an invisible text flash (FOIT) that delays perceived content readiness and directly hurts the Largest Contentful Paint and Cumulative Layout Shift metrics used in Core Web Vitals and page experience ranking.
Why this happens (and how we fix it)
In our experience, web font loading defaults to "block" behavior in most rendering engines unless a developer explicitly sets font display, swap in the @font face rule, and that property is easy to miss because the font still renders correctly, just later than it should. It usually gets skipped when fonts are added through a page builder or a third party font hosting snippet that doesn't expose font display as a configurable option, leaving the default block behavior in place without anyone deciding on it.
What it costs you while it goes unfixed
In our experience, visitors on a slower connection see invisible text for up to several seconds while the custom font downloads, a flash of invisible text that delays the point where the page feels loaded even if the layout is technically already there. That directly inflates Largest Contentful Paint, since the browser is holding back visible text as an asset, and it can trigger layout shift once the swap finally happens, both of which are Core Web Vitals metrics Google uses as a page experience ranking signal.
How we resolve it
01 Diagnose
We audit your current setup and identify the root cause.
02 Fix
We implement targeted corrections using proven methods.
03 Verify
We confirm the issue is resolved and monitor for recurrence.
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