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Joseph Savona
7f3826e8e4
For now we just reject all calls of impure functions, and the validation is off by default. Going forward we can make this more precise and only reject impure functions called during render. Note that I was intentionally imprecise in the return type of these functions in order to avoid changing output of existing code. We lie to the compiler and say that Date.now, performance.now, and Math.random return unknown mutable objects rather than primitives. Once the validation is complete and vetted we can switch this to be more precise.
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.