Why Ant Design v6 matters
Ant Design v6 is a technical, performance-first upgrade. It modernizes the styling engine around CSS variables, raises the minimum React version to 18, and introduces a zeroRuntime mode that can dramatically reduce runtime cost and bundle size. If you maintain a production UI built on Ant Design, planning an Ant Design v6 migration is a great opportunity to remove legacy workarounds and optimize theming and CSS delivery — but the change also has concrete gotchas that will bite if you rush it.
Before you upgrade: hard preconditions
Treat v6 as a checkpoint you must pass before flipping the switch:
Upgrade to React 18 or newer. v6 drops support for React ≤17.
