feat: add perEnvironmentWatchChangeDuringDev
#20996
Merged
+38
−8
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Description
watchChangehook was called only for the client environment for backward compat. But there was no way to opt-in to per-environment behavior like we have withperEnvironmentStartEndDuringDev. This PR addsperEnvironmentWatchChangeDuringDevflag to opt-in to the new behavior.Ported the rolldown unrelated part of vitejs#463