JL Kruger
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43 lines
953 B
Markdown
43 lines
953 B
Markdown
---
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title: React 19 API Changes
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impact: MEDIUM
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impactDescription: cleaner component definitions and context usage
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tags: react19, refs, context, hooks
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---
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## React 19 API Changes
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> **⚠️ React 19+ only.** Skip this if you're on React 18 or earlier.
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In React 19, `ref` is now a regular prop (no `forwardRef` wrapper needed), and `use()` replaces `useContext()`.
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**Incorrect (forwardRef in React 19):**
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```tsx
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const ComposerInput = forwardRef<TextInput, Props>((props, ref) => {
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return <TextInput ref={ref} {...props} />
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})
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```
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**Correct (ref as a regular prop):**
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```tsx
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function ComposerInput({ ref, ...props }: Props & { ref?: React.Ref<TextInput> }) {
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return <TextInput ref={ref} {...props} />
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}
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```
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**Incorrect (useContext in React 19):**
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```tsx
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const value = useContext(MyContext)
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```
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**Correct (use instead of useContext):**
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```tsx
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const value = use(MyContext)
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```
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`use()` can also be called conditionally, unlike `useContext()`.
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