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Project	Deployment	Preview	Updated (UTC)
react-window	Ready	Preview	Oct 26, 2025 8:39pm

Just tested this and it works with React 18.3+ and 19.0+ but it fails with React <= 18.2:

src/App.tsx:15:25 - error TS2339: Property 'index' does not exist on type '{}'.

15 function RowComponent({ index, style }: RowComponentProps<object>) {

The underlying cause of which is:

Module '"react"' has no exported member 'JSX'.ts(2305)

Replacing the JSX return type with ReactElement<any, any> causes a different underlying issue for CellComponentProps and RowComponentProps that also breaks the build:

Type 'ReactNode' is not assignable to type 'ReactElement<any, any> | null'.

Though I think that one can be fixed by changing the return type annotation for cellComponent and rowComponent to also be ReactElement.

Wow! This is very kind of you. Thanks, @Andarist!

Always happy to help out :)