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fix: Update 'onCaughtError' type inference in 'RenderOptions' to work with React v19 #1401

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fix: Update 'onCaughtError' type inference in 'RenderOptions' to work with React v19 #1401

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2 changes: 1 addition & 1 deletion types/index.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,7 @@ export interface RenderOptions<
* @see {@link https://react.dev/reference/react-dom/client/createRoot#parameters createRoot#options}
*/
onCaughtError?: ReactDOMClient.RootOptions extends {
onCaughtError: infer OnCaughtError
onCaughtError?: infer OnCaughtError
}
? OnCaughtError
: never
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13 changes: 10 additions & 3 deletions types/test.tsx
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Expand Up @@ -266,9 +266,16 @@ export function testContainer() {
export function testErrorHandlers() {
// React 19 types are not used in tests. Verify manually if this works with `"@types/react": "npm:types-react@rc"`
render(null, {
// Should work with React 19 types
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-expect-error
// Should work with React 19 types but intentionally fails with React 18 types.
//
// > Why use `@ts-ignore` instead of `@ts-expect-error`?
// > Default React 19 types work error-free, causing TS compiler
// > to report `@ts-expect-error` as unused (requiring removal).
// > But for compatibility with React 18 types in tests,
// > we have to use `@ts-ignore` instead.
//
// eslint-disable-next-line @typescript-eslint/ban-ts-comment, @typescript-eslint/prefer-ts-expect-error
// @ts-ignore
onCaughtError: () => {},
})
render(null, {
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