docs(upgrade-guide): add Vite overlay stacking and layer order caveats#22848
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docs(upgrade-guide): add Vite overlay stacking and layer order caveats#22848johnleider wants to merge 1 commit into
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Summary
Two real-world v3→v4 migration issues that aren't currently documented in the upgrade guide, sourced from a production migration.
Vite dev-mode overlay z-index — Vite's dep pre-bundler can split Vuetify's overlay modules across two module graphs, creating two
useStackinstances. The result is overlays rendered inside dialogs stay at z-index 2000 instead of auto-stacking. Documents the symptom, root cause, and fix (optimizeDeps.include+ cache clear). Production builds are not affected.Layer order declaration import timing — The
@layerorder statement must be imported before any Vuetify styles, or the browser establishes layer priority from first-seen order. Documents the correct entrypoint pattern and explains the failure mode.