Use when configuring SSR environments, edge workers, custom environments, or migrating to the Vite 6+ environment model. Prevents using the Environment API on Vite 5 (where it does not exist) and misconfiguring per-environment vs shared plugin scoping. Covers per-environment build and dev settings,
Use when configuring SSR environments, edge workers, custom environments, or migrating to the Vite 6+ environment model. Prevents using the Environment API on Vite 5 (where it does not exist) and misconfiguring per-environment vs shared plugin scoping. Covers per-environment build and dev settings, EnvironmentOptions interface, custom environment providers, shared vs per-environment plugins, confi