Feature Flags | TanStack Redact Docs

redact() uses the full preset: all optional features enabled except native animation. Turn off only behavior your app does not need:

redact({ features: { hydration: false, classComponents: false } })
redact({ features: { viewTransitions: true } }) // experimental animation
redact({ preset: 'nano', features: { context: true } })

nano starts with every optional feature off. Overrides merge with the preset. Feature savings overlap and are not additive.

What each disabled feature removes

Flag	Behavior when false
activity	Hidden children unmount and lose state.
fragmentRefs	No Fragment DOM instance.
viewTransitions	No native snapshots or animation callbacks; the boundary retains state.
portal	Children render in place, not into the target container.
context	Providers do not propagate values; reads return the default.
suspense	No fallback UI; thrown thenables still retry on settlement.
memo	No prop-equality bailout.
forwardRef	No wrapper forwarding; ordinary ref props still work.
lazy	Only already-synchronous payloads resolve.
classComponents	Constructor, render, and setState only; no lifecycles or error boundaries.
hydration	hydrateRoot throws; use createRoot.