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fix: prevent sub-app FOUC on in-fragment navigation - #132
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oto-macenauer-absa
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Oct 27, 2026
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tested, lgtm, thx!
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What
Navigating between pages inside the embedded knowledge base flashed unstyled
content for a moment. Sub-app CSS is an external
<link>, which only blockspaint during a real page load - so hard loads were fine, but the client-side
router swap revealed the new page before its stylesheet applied. While standalone
Astro waits for new styles our embedded swap didn't.
Now the host view transition holds the old frame until the swapped-in
stylesheets have loaded, then crossfades to the styled page.
Changes
src/scripts/embedded-transitions.js— wait for pending stylesheets (with a2s timeout) inside the host
startViewTransitioncallback before revealingthe new page.
Closes #131