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e63d3d1491
- Updated all directly defined dependencies to the latest React 19 Beta - `package.json`: used `resolutions` to force React 19 for `react-is` transitive dependency - `package.json`: postinstall script to patch fbt for the React 19 element Symbol - Match on the message in Snap to exclude a React 19 warning that `act` should be imported from `react` instead (from inside `@testing-library/react`) - Some updated snapshots, I think due to now recovering behavior of `useMemoCache`, please review. In a next step, we can do the following. I excluded it since it from here as it made the PR unreviewable on GitHub. - Snapshots now use `react/compiler-runtime` as in prod, so the different default in Snap is no longer needed.
React Compiler
React Compiler is a compiler that optimizes React applications, ensuring that only the minimal parts of components and hooks will re-render when state changes. The compiler also validates that components and hooks follow the Rules of React.
More information about the design and architecture of the compiler are covered in the Design Goals.
More information about developing the compiler itself is covered in the Development Guide.