mirror of
https://github.com/zebrajr/react.git
synced 2025-12-07 12:20:38 +01:00
5f4c5c920f
React uses function identity to determine whether a given JSX expression represents the same type of component and should reconcile (keep state, update props) or replace (teardown state, create a new instance). This PR adds off-by-default validation to check that developers are not dynamically creating components during render.
The check is local and intentionally conservative. We specifically look for the results of call expressions, new expressions, or function expressions that are then used directly (or aliased) as a JSX tag. This allows common sketchy but fine-in-practice cases like passing a reference to a component from a parent as props, but catches very obvious mistakes such as:
```js
function Example() {
const Component = createComponent();
return <Component />;
}
```
We could expand this to catch more cases, but this seems like a reasonable starting point. Note that I tried enabling the validation by default and the only fixtures that error are the new ones added here. I'll also test this internally. What i'm imagining is that we enable this in the linter but not the compiler.
ghstack-source-id: e7408c0a55478b40d65489703d209e8fa7205e45
Pull Request resolved: https://github.com/facebook/react/pull/32683
|
||
|---|---|---|
| .. | ||
| scripts | ||
| src | ||
| jest.config.js | ||
| package.json | ||
| README.md | ||
| tsconfig.json | ||
| tsup.config.ts | ||
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