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Based on https://github.com/facebook/react/pull/30995 ([rendered diff](https://github.com/jackpope/react/compare/inline-jsx-2...jackpope:react:inline-jsx-3?expand=1)) ____ Some apps still use `react.element` symbols. Not only do we want to test there but we also want to be able to upgrade those sites to `react.transitional.element` without blocking on the compiler (we can change the symbol feature flag and compiler config at the same time). The compiler runtime uses `react.transitional.element`, so the snap fixture will fail if we change the default here. However I confirmed that commenting out the fixture entrypoint and running snap with `react.element` will update the fixture symbols as expected.
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.