How to React Compiler

The speaker is Anton Nevsha, a front-end engineer with 11 years of commercial experience.

No, the React compiler is not the same as React 19. Installing React 19 alone will not provide the benefits of the React compiler.

To use the React compiler, you need to install the Babel plugin 'React Compiler' from NPM and specify it in the V configuration file.

During its beta phase, the React compiler may throw errors like 'to-do' or 'invariant,' indicating unfinished features or development.

The React compiler may execute hooks more often than expected, affecting memorization. Workarounds include renaming hooks or restructuring code to avoid unnecessary executions.

To see hidden error messages, enable the 'validate preserve existing memorization guarantees' flag in the plugin configuration.

The React compiler helps improve code structure, making components cleaner and simpler, though short-term performance gains may not be significant if hooks are already well-optimized.

The React compiler is a tool that offers features like automatic memorization and can optimize React components by detecting dependencies and recomputing outputs only when necessary.

The enable function outlining feature is responsible for extracting the JSX part from array map callbacks, but it has limitations, such as not tolerating variables declared outside the map callback scope.