2.0.0-beta.3

[shuding]

Highlights

Better React 18 Support (#1962)

This is, for developers that use SWR, it will just work out of the box.

Brought to you by @promer94 and @shuding, this release includes a core refactoring that improves React 18 support by adopting APIs like useSyncExternalStore and startTransition internally. Especially when rendering UIs concurrently with React 18, this new SWR version ensures stronger UI consistency.

Worth note that the current stable 1.x version of SWR still works well in React 18.

This core change isn't breaking and does not affect React <=17 apps.

Breakings

Avoid using Suspense on the server-side (#1931)

When using suspense: true with SWR on the server-side (including pre-rendering in Next.js), it's now required to provide the initial data via fallbackData or fallback. This means that you can't use Suspense to fetch data on the server side as of today, but either doing fully client-side data fetching, or fetch the data via the framework (such as getStaticProps in Next.js).

While Suspense for libraries is still experimental, this behavior might change before the 2.0 stable release. More discussions can be found here: #1906.

What's Changed

• breaking: Throw error when using suspense on the server side without fallback in React 18 by @shuding in breaking: Throw error when using suspense on the server side without fallback in React 18 #1931
• feat: Improved React 18 support by @promer94 in Improved React 18 support #1962
• fix: Fix cache types by @chibicode in Fix cache types #1961
• fix: Remove mount check for react18 by @promer94 in remove mount check for react18 #1927
• fix: Mutate args for useSWRInfinite hook by @sanjeev29 in fix: mutate args for useSWRInfinite hook #1947
• fix: Import with-selector with extension from useESE by @huozhi in build: import with-selector with extension from useESE #1967
• fix: Bug fixes by @shuding in Bug fixes #1968
• fix: Fix race conditions related to optimistic UI by @shuding in Fix race conditions related to optimistic UI #1970
• type: Extends useConfig cache interface by @promer94 in type: extends useConfig cache interface #1938
• type: Fix type regressions by @promer94 in types: fix type regressions #1966
• chore: Don't check unused vars with underscore prefix by @huozhi in lint: dont check unused vars with underscore prefix #1939
• chore: Upgrade to jest 28 by @huozhi in test: upgrade to jest 28 #1942
• chore: Faster type checking by @shuding in chore: Faster type checking #1969
• chore: Fix codesanbox ci import error by @promer94 in fix: try fix codesanbox ci import error #1971

New Contributors

• @chibicode made their first contribution in Fix cache types #1961
• @sanjeev29 made their first contribution in fix: mutate args for useSWRInfinite hook #1947

Full Changelog: 2.0.0-beta.1...2.0.0-beta.3

---

This discussion was created from the release 2.0.0-beta.3.