Framework semantic default
Vite 7 default build target baseline widely available browsers target change
A hidden older browser fails on emitted syntax after default target changes.
Agent Quick Fix
Repair against the current Vite contract, then keep the change narrow and source-backed.
Product: Vite
Current-contract area: Vite 7 browser target baseline changes output compatibility
Likely root cause: A hidden older browser fails on emitted syntax after default target changes.
Repair direction: Verifier checks behavior across multiple requests/build modes, not merely compilation. Check emitted assets and runtime behavior across the supported target.Symptom
A hidden older browser fails on emitted syntax after default target changes.
Why This Happens
Local code often type-checks under both old and new framework semantics; the failure depends on the installed framework version and current runtime defaults.
Common Wrong Fixes
- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.
Codex Search Keywords
These are the search terms observed in a neutral Codex validation run for this failure shape.
Vite 7 default build target baseline widely available browsers target change
site:vite.dev build target baseline-widely-available Vite 7
Vite 7 default target chrome107 edge107 firefox104 safari16
https://vite.dev/config/build-options.html
https://v7.vite.dev/guide/migration.html