FastAPI app.frontend() now supports local development 💻️ fastapi dev: a missing frontend directory only shows a warning 👨‍🔬 fastapi run: exits with an error instead 🚨 ✨ new default check_dir="auto" ✨ new env var FASTAPI_ENV="development" fastapi.tiangolo.com/tutoria…

Jul 29, 2026 · 2:54 PM UTC

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Replying to @FastAPI
Hmm I don't quite understand how FastAPI's frontend differs from mounting static files?
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The main point is handling fallbacks for client-side routing: fastapi.tiangolo.com/tutoria…
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Replying to @FastAPI @kozo2
Gerard Sans | Axiom 🇬🇧
@gerardsans
Jul 29
> Me : Think again. More patiently. > Claude: Flagged . . .
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Replying to @FastAPI
I don't understand what is this what is this new frontend?
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Replying to @FastAPI
dont understand about this thing
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Replying to @FastAPI
FastAPI is getting better, but local dev still needs smoother error handling. Warnings are great, but errors can kill momentum , we need a way to keep iterating even when something’s off.
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