mirror of
https://github.com/zebrajr/react.git
synced 2025-12-06 12:20:20 +01:00
a78bbf9dbc
We previously didn't track context variables in the hoistable values
sidemap of `propagateScopeDependencies`. This was overly conservative as
we *do* track the mutable range of context variables, and it is safe to
hoist accesses to context variables after their last direct / aliased
maybe-assignment.
```js
function Component({value}) {
// start of mutable range for `x`
let x = DEFAULT;
const setX = () => x = value;
const aliasedSet = maybeAlias(setX);
maybeCall(aliasedSet);
// end of mutable range for `x`
// here, we should be able to take x (and property reads
// off of x) as dependencies
return <Jsx value={x} />
}
```
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/31582).
* #31583
* __->__ #31582
|
||
|---|---|---|
| .. | ||
| apps/playground | ||
| crates | ||
| docs | ||
| fixtures | ||
| packages | ||
| scripts | ||
| .eslintrc.js | ||
| .gitignore | ||
| Cargo.lock | ||
| Cargo.toml | ||
| package.json | ||
| README.md | ||
| rust-toolchain.toml | ||
| rustfmt.toml | ||
| yarn.lock | ||
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.