Preact 11.0.0-rc.0 released!

NewsBot · 10 August 2026 08:20

Preact 11.0.0-rc.0 has been released.

Features

implement use in compat (#5186, thanks @JoviDeCroock)

Implement getServerSnapshot for useSyncExternalStore (#4979, thanks @ssssota)

Support createPortal in core (#5168, thanks @JoviDeCroock)

Add useEffectEvent hook to compat (#5141, thanks @Mesoptier)

Correctness

Leverage moveBefore rather than insertBefore when available (#5161, thanks @JoviDeCroock)

Avoid mutating user-provided style objects when appending px (#5117, thanks @JSap0914)

Fix reusing template element content (#5192, thanks @JoviDeCroock)

Fix dirty child strict equality bailout (#5193, thanks @JoviDeCroock)

Add the constructor in when cloning VNodes (#5195, thanks @JoviDeCroock)

Defer passive effect cleanup on unmount (#5196, thanks @JoviDeCroock)

Performance

Compute minimal child moves with a longest increasing subsequence (#5174, thanks @JoviDeCroock)

Batch updates in flushSync (#5175, thanks @JoviDeCroock)

Avoid traversing retained subtrees (#5183, thanks @JoviDeCroock)

Reduce core bundle size in v11 (#5167, thanks @JoviDeCroock)

Reduce bundle size before release candidates go live (#5197, thanks @JoviDeCroock)

Hoist _children into a local in constructNewChildrenArray (#5198, thanks @JoviDeCroock)

Reduce Preact core compressed size (#5199, thanks @JoviDeCroock)

Maintenance

Bump reported React version to 19.0.0 (#5171, thanks @JoviDeCroock)

Remove debug re-throw (#5190, thanks @JoviDeCroock)

Commit pending hook state in options._render (#5187, thanks @JoviDeCroock)

Remove straggler forwarded (#5178, thanks @JoviDeCroock)

Derive document from parentDom instead of threading it (#5180, thanks @JoviDeCroock)

Remove redundant portal children guard (#5179, thanks @JoviDeCroock)

Restore _bits mangle for Preact ISO (#5200, thanks @JoviDeCroock)

Update contribution build commands (#5166, thanks @Minsecrus)

Remove unused dependencies (#5160, thanks @JoviDeCroock)

Avoid Trusted…

Link: Release 11.0.0-rc.0 · preactjs/preact · GitHub