react/compiler
lauren 888ea60d8e
[compiler][repro] Postfix operator is incorrectly compiled (#33508)
This bug was reported via our wg and appears to only affect values
created as a ref.

Currently, postfix operators used in a callback gets compiled to:

```js
modalId.current = modalId.current + 1; // 1
const id = modalId.current; // 1
return id;
```

which is semantically incorrect. The postfix increment operator should
return the value before incrementing. In other words something like this
should have been compiled instead:

```js
const id = modalId.current; // 0
modalId.current = modalId.current + 1; // 1
return id;
```

This bug does not trigger when the incremented value is a plain
primitive, instead there is a TODO bailout.
2025-06-11 14:40:42 -04:00
..
apps/playground [compiler]: fix link compiler & 4 broken tests from path containing spaces (#33409) 2025-06-09 08:40:27 -07:00
docs Update DEVELOPMENT_GUIDE.md (#32281) 2025-03-13 11:45:26 -04:00
fixtures [cleanup] Remove compiler runtime-compat fixture library (#31430) 2024-11-05 14:14:39 -05:00
packages [compiler][repro] Postfix operator is incorrectly compiled (#33508) 2025-06-11 14:40:42 -04:00
scripts Remove leftover Rust script (#33314) 2025-05-20 12:20:51 -04:00
.eslintrc.js [compiler:codegen] Wrap non-ascii characters in JsxExpressionContainer 2024-06-21 10:08:15 -04:00
.gitignore Remove leftover Rust script (#33314) 2025-05-20 12:20:51 -04:00
CHANGELOG.md [compiler] Update changelog for 19.1.0-rc.2 (#33207) 2025-05-15 10:34:11 -04:00
package.json [compiler] Update rimraf (#32868) 2025-04-14 15:15:14 -04:00
README.md Update readme and other docs 2024-05-06 14:53:47 -07:00
yarn.lock [mcp] Fix package.json (#33101) 2025-05-02 13:56:01 -04:00

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.