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react/compiler/packages/babel-plugin-react-compiler
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lauren 4ab827b869
[compiler] Dedupe @babel/types (#32581) 
Extracting portions of #32416 for easier review. This PR dedupes
@babel/types to resolve to 7.26.3, for compatibility in the root
workspace where eslint-plugin-react-hooks resides.

I also needed to update @babel/preset-typescript in snap.

The compiler changes in HIR and ReactiveScopes were needed due to types
changing. Notably, Babel [added support for optional chaining
assignment](https://github.com/babel/babel/pull/15751) (currently [Stage
1](https://github.com/tc39/proposal-optional-chaining-assignment)), so
in the latest versions of @babel/types, AssignmentExpression.left can
now also be of t.OptionalMemberExpression.

Given that this is in Stage 1, the compiler probably shouldn't support
this syntax, so this PR updates HIR to bailout with a TODO if there is a
non LVal on the lhs of an Assignment Expression.

There was also a small superficial SourceLocation change needed in
`InferReactiveScopeVariables` as Babel 8 changes were [accidentally
released in
7](https://github.com/babel/babel/issues/10746#issuecomment-2699146670).
It doesn't affect our analysis so it seems fine to just update with the
new properties.

---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/32581).
* #32582
* __->__ #32581

Co-authored-by: michael faith <michaelfaith@users.noreply.github.com>

Co-authored-by: michael faith <michaelfaith@users.noreply.github.com>
2025-03-12 17:02:10 -04:00
..
scripts [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00
src [compiler] Dedupe @babel/types (#32581) 2025-03-12 17:02:10 -04:00
jest.config.js Compiler: unfork prettier config (#30205) 2024-07-18 17:00:24 -04:00
package.json [compiler] Dedupe @babel/types (#32581) 2025-03-12 17:02:10 -04:00
README.md
tsconfig.json [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00
tsup.config.ts [compiler] Migrate compiler packages to tsup (#32550) 2025-03-07 16:41:55 -05:00

README.md

babel-plugin-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.

This package contains the React Compiler Babel plugin use in projects that make use of Babel. You can find instructions for using this plugin here: https://react.dev/learn/react-compiler