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October 2, 2022 02:50
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Example of a forward ref generic component in React 18
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| import React, { ForwardedRef, forwardRef, MouseEvent } from 'react'; | |
| type ClickableListProps<T> = { | |
| items: T[]; | |
| onSelect: ( | |
| item: T, | |
| event: MouseEvent<HTMLButtonElement, globalThis.MouseEvent>, | |
| ) => void; | |
| }; | |
| function ClickableListInner<T>( | |
| props: ClickableListProps<T>, | |
| ref: ForwardedRef<HTMLUListElement>, | |
| ) { | |
| return ( | |
| <ul ref={ref}> | |
| {props.items.map((item, i) => ( | |
| <li key={i}> | |
| <> | |
| <button onClick={(e) => props.onSelect(item, e)}>Select</button> | |
| {item} | |
| </> | |
| </li> | |
| ))} | |
| </ul> | |
| ); | |
| } | |
| const ClickableList = forwardRef(ClickableListInner) as <T>( | |
| props: ClickableListProps<T> & { ref?: ForwardedRef<HTMLUListElement> }, | |
| ) => ReturnType<typeof ClickableListInner>; | |
| export default ClickableList; |
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I think they just showed another approach for the
ClickableListInner.The forwardRef is exactly the same as the first snippet