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fix: flash of unstyled content (fouc) when fonts load #139

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ramboz opened this issue Apr 10, 2023 · 0 comments
Open

fix: flash of unstyled content (fouc) when fonts load #139

ramboz opened this issue Apr 10, 2023 · 0 comments
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bug Something isn't working 🛑 Blocked Issue is blocked by external dependency
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Phase 4 - Go-live

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ramboz commented Apr 10, 2023

When the page initially loads, we have a FOUC when the fonts get loaded which creates a visual shift, and adds some CLS.

We have a few options to fix this:

  1. load the critical fonts part of the LCP in the eager phase (but will impact performance)
  2. Adjust the fallback font and size-adjust to closely match the final font. See https://www.hlx.live/developer/font-fallback
@ramboz ramboz added the bug Something isn't working label Apr 10, 2023
@ramboz ramboz self-assigned this Apr 26, 2023
@ramboz ramboz mentioned this issue Apr 26, 2023
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@ramboz ramboz added the 🛑 Blocked Issue is blocked by external dependency label Apr 26, 2023
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feat: add font fallbacks to limit cls hlxsites/delta
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@ramboz